|
| You may search our web site for all documents containing
matching words or patterns. |
Click on the picture
to Order Information
|
- Bitter Harvest (Carbon Tetrachloride and Well Water)
- Contaminated Tap Water
- Controversy Swirls around Toilet-to-Tap Project
- Dirty tap water risk for pregnant women
- Dog waste poses threat to water
- Drugged Drinking Water
- Drinking Water Industry Standards
- FBI says al-Qaida after water supply
- Five Hidden Dangers of Your Morning Shower
- Hunt for Endocrine Disrupters Is On
- Outbreaks of The Toxic Pfiesteria Piscicida Micororanism
- Roanoke considers ultraviolet treatment system at Crystal Spring
- Water-Quality Data for Pharmaceuticals, Hormones, and Other Organic Wastewater Contaminants in U.S. Streams, 1999-2000
- 2000 Kansas Water Assessment
To
top of page
Bitter
Harvest (Carbon Tetrachloride and Well Water)
Carbon
tetrachloride was used to protect grain from rodents;
Now
it taints well water in the Midwest, and perhaps in Colorado
Denver Post Staff Writer
Sunday, April 14, 2002 -
FRANKFORT, Kan. - Sixteen years ago, the U.S. government polluted
the town's main drinking water supply with a toxic industrial
solvent. The town shut down the well and warned away visitors
with a bright red-and-white sign: Not For Human Or Animal
Consumption.
Today the sign has faded pink. The well remains polluted.
And the federal government still won't do anything about its
mess.
Intended in the 1950s and 1960s to keep grain safe from rats,
a U.S. Department of Agriculture program that doused food
stockpiles with a chemical, carbon tetrachloride, has become
a blight on the Great Plains.
Frankfort is one of 115 towns that the USDA has admitted contaminating
- so far. No one at the USDA knows where the pollution stops.
Though USDA officials say that as many as 4,400 rural facilities
were part of the program, the agency has yet to test most.
In fact, the agency can't even say how many have been tested
for carbon tetrachloride, which the Centers for Disease Control
classifies as a probable carcinogen. The USDA says it's doing
all it can with a limited budget.
In Colorado alone, the pollution-plagued program used more
than 2,100 silos and storage bins. But only a few dozen ever
have been checked for contamination, and the USDA admits it
hasn't located hundreds that were dismantled years ago.
No one has conducted comprehensive health studies to judge
whether pollution harmed those who drank and breathed it.
"The USDA created a big problem here, but they haven't done
a thing to fix it," said Dave Staley, water manager for Frankfort,
a northeastern Kansas town of 850. "It's Washington bureaucrats.
What can I say?"
Even before its main well turned bad, Frankfort, like many
farm towns, was fighting for survival.
Since World War II, the town has lost half its population.
Of the remaining residents, one of every three is 65 or older.
The rundown opera house and bakery were torn down to make
a parking lot for Main Street businesses that increasingly
lose customers to a city shopping mall 48 miles away.
When USDA pollution first afflicted Frankfort in 1986, the
town pressed two backup wells into service. But years of heavy
pumping are taking a toll. In the past two years, water production
from the backup wells dropped 60 percent, and town officials
fear their supply is running dry.
Officials from another federal agency charge that the USDA
works slowly.
Awaiting a "public outcry'
"The only way USDA will respond is if there's a public outcry,"
said Victor Lyke of the Kansas City regional office of the
U.S. Environmental Protection Agency. "The USDA has not been
easy to work with. They don't want to clean the sites willingly.
They put out fires - damage control."
The manager of the USDA's pollution-response program conceded
some problems but vowed to do better.
"A lot of this stuff happened 30 to 40 years ago, and there
are very few records associated with it," said Steve Gilmore
of the USDA in Washington. "We're doing the best we can with
the funds we've been allocated."
The USDA official said his program typically gets $3 million
to $5 million a year.
In this fight, there's more at stake than just safe tap water.
Who to call?
For more information about how to test your home well for
contamination, call Christopher Dann of the Colorado Department
of Public Health and Environment: (303) 692-3281.
Rural officials worry that the stigma of pollution on their
towns will make it even harder to withstand the farm economy's
latest downturn. "It's very hard to keep a small-town community
going these days," said Frankfort Mayor Sharon Owen. "We don't
need to have bad water on top of everything else we're dealing
with."
From the front window of her six-room City Hall, the mayor
sees her town's economic plight.
Where five grocery stores once thrived, only the J&R IGA
survives today. The Kennedy Motors Ford dealership, which
opened in 1915, stopped selling new cars last winter. The
last new business in town, Elsie Grace's Gift and Bake Shop,
opened three years ago.
Even the town's grain silo, once one of Kansas' largest, has
been dismantled.
Like small-town economic woes, the roots of the carbon tetrachloride
contamination problem run decades deep.
In the 1950s and 1960s, new fertilizers, pesticides and agricultural
equipment boosted production of grain crops such as corn,
wheat and milo. But soaring crop yields soon caused a market
glut - and falling prices for farmers.
So the USDA, and its subsidiary, the Commodity Credit Corp.,
started buying tons of grain to help bolster prices. That
grain was stockpiled at 4,400 silos, Quonset huts and bins
across America.
To keep rodents and insects at bay, the Commodity Credit Corp.
often doused grain - and the area around grain storage bins
- with a chemical called Activated 80-20 Grain Fumigant. The
fumigant was so powerful that a worker could spray it on top
of a 100-foot grain elevator and know that the chemical would
kill all pests, from top to bottom, within three days.
In 1979 alone, the government and farmers sprayed 28 million
pounds of the fumigant.
Activated 80-20 was 80 percent carbon tetrachloride, an industrial
solvent.
The federal government banned the sale of carbon tetrachloride
in 1985 for environmental reasons. By that time, streams of
the chemical had seeped from the government grain storage
bins into groundwater and dozens of home and community wells.
Health officials say it's unsafe to drink water laced with
more than 5 parts per billion of carbon tetrachloride. But
in parts of Kansas and Nebraska, some people unknowingly drank
carbon tetrachloride at levels 100 times worse than the health
standard, federal records show.
Carbon tetrachloride pollution is especially troublesome because
it is hard for an average person to detect. At the concentrations
found in most drinking-water wells, the chemical is colorless,
odorless and tasteless. Well tests for it and other volatile
organics can cost hundreds of dollars each.
The federal government requires city and town water supplies
to be tested regularly for a variety of chemicals, including
carbon tetrachloride. But there is no similar requirement
for private wells. That means many rural homeowners don't
check for carbon tetrachloride pollution.
That can be a risky omission. At low levels, carbon tetrachloride
can cause serious liver and kidney damage. At extremely high
levels, it causes comas and death.
In Kansas and Nebraska, state officials regularly check water
quality in the private wells of rural residents. That's how
they found many USDA-polluted wells.
In Colorado, however, no such program exists. So it's unclear
whether Colorado's rural residents are drinking polluted water
from private wells, as was the case in neighboring states.
"We have no budget for that at all, and we have no statutory
authority to do it," said David Holm, water quality manager
for the Colorado Department of Public Health and Environment.
Seven known locations
Colorado officials said carbon tetrachloride has been found
in municipal water supplies of seven rural towns - Springfield,
Burlington, Seibert, Bristol, Johnstown, Cheyenne Wells and
Arriba - but the pollutant was at such low levels that it
met the national health standard.
A 1960 USDA memo listed 2,185 Commodity Credit Corp. silos
with more than 8 million bushels of grain in Colorado. Many
of those silos no longer exist, and the USDA has screened
few former grain-storage sites for possible pollution.
Denver regional EPA officials say they want to learn more
about the issue in Colorado and call for more cooperation
among federal, state and local officials to find tainted private
wells.
"Our problem is finding the bull's-eye," said Sabrina Forrest
of the Denver regional EPA office.
Residents and regulators in other states have struggled to
persuade USDA to clean up its mess.
In Navarre, Kan., carbon tetrachloride was discovered at levels
50 times worse than health standards in 1990. It took three
years before the USDA started supplying residents with bottled
water for drinking and cooking.
Even then, residents said they still had to bathe in polluted
water. A simple shower in contaminated water can be worse
than drinking contaminated water, health studies show, because
the hot water gives off a toxic gas that can be inhaled.
The USDA didn't get all Navarre residents a permanent, clean-water
supply until April 2001 - 11 years after the pollution was
discovered. The agency has announced no plans to clean up
its Navarre pollution, which remains beneath homes.
In other neighborhoods across America, toxic gas from the
same chemical wafted up from the groundwater and into living
rooms, threatening residents' health.
But the USDA has yet to test a single home for toxic gas health
threats. In fact, USDA program manager Gilmore said he was
not familiar with toxic gas risks and requested a copy of
a recent Denver Post news series on the issue.
The lingering contamination breeds fear among Navarre residents
such as Jim Johnson, a retired artificial inseminator for
a livestock company who raised four children in a home where
the well was polluted with 373 parts per billion of carbon
tetrachloride - 75 times worse than health standards.
"Our stomachs were hurting, but we didn't know anything,"
Johnson said. "Now when somebody here dies of cancer, you
wonder: Was it the water that did it?"
Neither the state nor federal government has conducted health
studies in areas polluted by the USDA.
The pollution also has exacted a heavy social toll. Fewer
than 200 people live in Navarre, half as many as in the 1970s.
The sole remaining business is the farmers' co-op, a former
source of carbon tetrachloride.
Navarre residents with polluted wells now clash with farmers
who sold the USDA the crops that led to so much pollution.
"It's just horrible what this pollution has done to our little
town," said Naomia Johnson, Jim Johnson's wife of 48 years.
"People are at each other. The president of the Lions Club
called to give me hell. The co-op is the last thing going
here, and they don't like it when it gets blamed for contaminating
the water."
In Frankfort, town officials have tried for 16 years to make
the USDA decontaminate the town's main well.
At one point, the USDA suggested that the town take polluted
water and mix it with clean water from the two replacement
wells, state and local officials said, but the town rejected
the plan.
"We want a good, clean water supply, just like we had before,"
said Owen, the Frankfort mayor. "What's so wrong about that?"
------------------------------------------------------------------------
Mark Obmascik can be reached at Mobmascik@denverpost.com or
303-820-1415.
All contents Copyright 2002 The Denver Post or other copyright
holders. se.
To
top of page
Dirty
tap water risk for pregnant women
January 8, 2002 Posted: 2:20 PM EST (1920 GMT)
WASHINGTON (AP) -- Millions of Americans have been drinking
tap water contaminated with chemical byproducts from chlorine
that are far more than what studies suggest may be safe for
pregnant women, two environmental groups say in a new study.
Chlorine is commonly used to disinfect drinking water. When
it is added to water that contains organic matter such as
runoff from farms or lawns, however, it can form compounds
such as chloroform that can cause illness.
The study released Tuesday by the Environmental Working Group
and Public Interest Research Groups identified areas that
may have increased health risks including miscarriage, neural
tube defects and reduced fetal growth from women drinking
chlorination byproducts.
"By failing to clean up rivers and reservoirs that provide
drinking water for hundreds of millions of Americans, EPA
and the Congress have forced water utilities to chlorinate
water that is contaminated with animal waste, sewage, fertilizer,
algae and sediment," the report says.
Jane Houlihan, EWG's research director, said the report also
shows how that cleanup failure has "a direct impact on human
health." Pregnant women need to drink plenty of water, she
said, but they can reduce their exposure to potential risks
through simple measures such as home filters and purchasing
bottled water.
One expert on environmental health cautioned that the link
between the byproducts and pregnancy risks is suggestive,
not conclusive.
Still, if the pregnancy studies are proved, millions could
be at risk, said Dr. Robert Morris, an environmental epidemiologist
at Tufts University School of Medicine in Boston.
"That body of literature isn't necessarily conclusive but
people ought to be aware of it," Morris said. "It's pretty
clear that some of these compounds can be pretty bad actors.
The fact that these levels are as high as they are is certainly
something to be concerned about."
The environmental groups combed water quality records in 29
states and the District of Columbia and matched them with
various research into birth defects and miscarriages conducted
by state and federal agencies and universities.
The groups said the places statistically most at risk due
to chlorination byproducts were those that are populous, lacked
buffers from urban sprawl and were downstream from agricultural
sites. But women in small towns generally face twice the risk
from drinking high levels of the byproducts, Houlihan said.
Matching high rates doesn't prove the environmental risk caused
the health problems, however. Also, the results are limited
because, among other reasons, such health records do not exist
in some states.
The Environmental Protection Agency already has decided that
some chlorination byproducts pose health risks and instituted
stricter standards on January 1 for seven of them: five haloacetic
acids, bromate and chlorite. The agency also began requiring
a reduction by one-fifth of the allowable level for trihalomethanes,
another chemical produced by adding chlorine to dirty water.
EPA studies showed that reducing the level of trihalomethanes
might mean 2,332 fewer cases of bladder cancer per year, down
from its estimate of up to 9,300 annual cases caused by trihalomethanes.
While the environmental groups said the majority of water
suppliers were meeting the current and future drinking water
health standards, they also found that since 1995 more than
11 million people in 1,044 communities were being served water
contaminated with chlorination byproducts for 12 months in
a row at levels above the new legal limit.
To reduce the risks, the groups said, the federal government
should provide billions of dollars more for cleaning up sources
of contaminated water and providing more buffer areas that
can filter potential contaminants from farmland and urban
areas.
Copyright 2002 The Associated Press.
To top of
page
Dog
waste poses threat to water
For as long as the dog has been man's best friend, dog waste
has posed a menace to man's nose and foot. Now science has
revealed a more unsavory truth: It's an environmental pollutant.
In the mid-1990s, scientists
perfected methods for tracking the origin of nasty bacteria
in streams and seawater. From Clearwater, Fla., to Arlington,
Va., to Boise the trail has led straight to the hunched-up
dog and to owners who don't pick up after their pets.
At some beaches, dogs help
raise bacteria levels so high that visitors must stay out
of the water. Goaded by such studies, some cities have directed
as much as $10,000 in the last few years to encourage dog
owners to clean up after their pets. A few municipalities
have started issuing citations to those who ignore pet clean-up
ordinances.
Many dog lovers are in denial
about their pooches' leavings. But researchers have named
the idea that areas used by dogs pump more bacteria into waterways
the "Fido hypothesis."
Dogs are only one of many
fixtures of suburban America that add to water pollution.
Lawn fertilizers, rinse water from driveways and motor oil
commonly end up in streams and lakes.
But unlike those sources,
dogs generate disease-causing bacteria that can make people
sick. Studies done in the last few years put dogs third or
fourth on the list of contributors to bacteria in contaminated
waters. "Dogs are one of our usual suspects," says Valerie
Harwood, a microbiologist at the University of South Florida.
"At certain sites, we find their effect to be significant."
It doesn't take a Ph.D.
to figure out that dog do is nasty. But it took science to
determine how nasty it is.From mutt to blue-blooded champion,
all dogs harbor so-called coliform bacteria, which live in
the gut. The group includes E. coli, a bacterium that can
cause disease, and fecal coliform bacteria, which spread through
feces. Dogs also carry salmonella and giardia. Environmental
officials use measurements of some of these bacteria as barometers
of how much fecal matter has contaminated a body of water.
This wouldn't matter if
pet dogs were as rare as pet chinchillas. But four in 10 U.S.
households include at least one dog, according to the American
Pet Products Manufacturers Association. The association's
statistics also show that Americans owned 54.6 million dogs
in 1996 and 68 million dogs in 2000. Of that total, 45% were
"large" dogs 40 pounds or more.
Those numbers add up to
a lot of kibble. That wouldn't matter if all dog owners also
owned a pooper-scooper. But several studies have found that
roughly 40% of Americans don't pick up their dogs' feces (women
are more likely to do so than men).
New analysis provides answers.
The environmental impact
of dog waste went unrecognized for decades. Then scientists
developed lab techniques to determine the origin of fecal
bacteria contaminating water. One method is a variant of DNA
fingerprinting. Another method looks at the antibiotic resistance
of microbes from different species.
Scientists caution that
the methods are still new. They are able to distinguish between
major and minor sources of pollution, but they can't say with
precision whether dogs contribute 20% or 30% of the pollution
in a stream. "There's inherently some error," says Don Stoeckel,
a microbiologist for the Ohio district of the U.S. Geological
Survey who's studying bacteria-tracking methods. "I think
the best (they) can do is give you some evidence of the magnitude
of each source."
Nonetheless, Stoeckel says,
the analytical tools do provide useful information. Researchers
have studied dozens of waterways. Wild birds and humans usually
head the roster of who's fouling the water. But in some areas,
dogs make significant deposits.
 |
At Morro Bay, Calif.,
for example, dogs contribute roughly 10% of the E. coli,
says Christopher Kitts, a microbiologist at California
Polytechnic State University-San Luis Obispo. "And that
can be the difference between a beach closing and a
beach not closing," he says.
Places where dogs dirty the water:
|
 |
Stevenson Creek in
Clearwater, Fla. Residents were worried that a sewage
treatment plant contaminated the creek. But when Harwood
tested the water, she found that dogs, along with leaky
septic tanks and wild animals, were to blame for high
bacteria counts. Dog feces probably washed out of yards
by the creek, Harwood says.
|
 |
Four Mile Run in Arlington
and Fairfax counties, Va. Studies show that dogs add
to the contamination in this suburban Washington, D.C.
stream. Officials calculate that the 12,000 dogs living
in Four Mile Run's watershed leave behind more than
5,000 pounds of "solid waste" every day.
|
 |
Boise River in Boise.
The river suffers from high bacteria levels that make
it unsuitable for swimming.Testing of streams and drainpipes
flowing into the river showed that in urban areas, dogs
were a leading culprit. In some spots, dogs and cats
account for even more of the bacteria than human feces
from dysfunctional septic tanks and leaky sewage
pipes do.
|
Fines
don't sway some
Even where dogs aren't the
prime offenders, they're one of the few polluters authorities
have control over. At many California beaches, for example,
seagulls and other birds are most responsible for high bacteria
levels. But federal laws protect birds.
That leaves dogs. Officials
know that they have a lot of educating to do before people
realize their pooch can be a canine sewage pipe. Some people
find it humiliating to carry a plastic bag.
A survey by the Center for Watershed Protection in 1999 found
that of the 41% of respondents who rarely or never clean up
after their dogs, 44% would refuse to do so in the face of
fines and neighbors' complaints. Reasons included, "because
it eventually goes away," "small dog, small waste," and "just
because."
So more cities may follow
the lead of Laguna Beach, Calif., a wealthy beach enclave.
The city provides pooper-scoopers at the local dog park. But
many people "don't take care of their little friends," says
Victor Hillstead, the city's parks and buildings manager.
So the city hired Entre-Manure,
poop-scooping service based in nearby Dana Point whose motto
is "#1 in the #2 Business." Since the city's contract started
in January, the service has collected 187 pounds of dog waste
from the city. "I'm real proud of that fact," says Craig Stern,
founder and chief picker-upper. "That's pollution that'll
never reach the ocean."
To
top of page
Contaminated
Tap Water
From: http://www.newsday.com/
By John Heilprin, Associated Press Writer, January 8, 2002
Washington - Millions of Americans have been drinking tap
water contaminated with chemical byproducts from chlorine
that are far more than what studies suggest may be safe for
pregnant women, two environmental groups say.
Chlorine is commonly used to disinfect drinking water. When
it is added to water that contains organic matter such as
runoff from farms or lawns, however, it can form compounds
such as chloroform that can cause illness.
The study released Tuesday by the Environmental Working Group
and Public Interest Research Groups identified areas that
may have increased health risks including miscarriage, neural
tube defects and reduced fetal growth from women drinking
chlorination byproducts.
"By failing to clean up rivers and reservoirs that provide
drinking water for hundreds of millions of Americans, EPA
and the Congress have forced water utilities to chlorinate
water that is contaminated with animal waste, sewage, fertilizer,
algae and sediment," the report says.
Jane Houlihan, EWG's research director, said the report also
shows how that cleanup failure has "a direct impact on human
health." Pregnant women need to drink plenty of water, she
said, but they can
reduce their exposure to potential risks through simple measures
such as home filters and purchasing bottled water.
However, C.T. Howlett Jr., executive director of the Chlorine
Chemistry Council, said government agencies found no compelling
link between reproductive hazards and chlorinated water.
He said chlorine has been added to drinking water for more
than a century, and the environmental groups' study "may unnecessarily
alarm the public and, in particular, pregnant women, about
risks that are not supported by scientific evidence."
Catherine C. Milbourn, a spokeswoman for the Environmental
Protection Agency, said, "EPA has standards in place for these
byproducts and has set even stricter standards in 2002 that
local water providers are beginning to implement."
Milbourn added that the EPA "has an ongoing health research
program to provide additional scientific insight into the
potential risks posed by disinfection byproducts."
Still, if the pregnancy studies are proved, millions could
be at risk, said Dr. Robert Morris, an environmental epidemiologist
at Tufts University School of Medicine in Boston.
"That body of literature isn't necessarily conclusive but
people ought to be aware of it," Morris said. "It's pretty
clear that some of these compounds can be pretty bad actors.
The fact that these levels
are as high as they are is certainly something to be concerned
about."
The environmental groups
combed water quality records in 29 states and the District
of Columbia and matched them with various research into birth
defects and miscarriages conducted by state and federal agencies
and universities.
The groups said the places statistically most at risk due
to chlorination byproducts were those that are populous, lacked
buffers from urban sprawl and were downstream from agricultural
sites. But
women in small towns generally face twice the risk from drinking
high levels of the byproducts, Houlihan said.
Matching high rates doesn't prove the environmental risk caused
the health problems, however. Also, the results are limited
because, among other reasons, such health records do not exist
in some states.
To
top of page
Drugged
Drinking Water
Environmental Health Perspectives
Volume 108, Number 10, October 2000
We should no longer think of water as a gift of nature
but an industry which needs investment.
o Drugged Drinking Water
o Controversy Swirls around Toilet-to-Tap Project
Drugs and personal care products that are excreted from or
washed off the body naturally end up in the sewage that flows
into sewer systems and septic tanks, but where do they go
from there?
Scientists are beginning
to monitor the extent of pharmaceutical and personal care
products (PPCPs) in the aquatic environment and their consequences.
What they're finding is that, through leaching from septic
tanks and escaping intact through sewage treatment processes,
some of these substances are ending up back in the drinking
water.
Germany has been at the forefront of PPCP monitoring. Studies
conducted there during the past 10 years confirmed the presence
of PPCPs in treated and untreated sewage effluent, surface
water, groundwater, and drinking water. Most commonly found
were anti-inflammatory and pain-killing drugs, cholesterol-lowering
drugs, anticonvulsants, and sex hormones from oral contraceptives.
Samples from 40 German rivers and streams turned up residues
of 31 different PPCPs, according to a report presented at
the March 2000 American Chemical Society meeting in San Francisco,
California, by Thomas Ternes, a chemist at the Institute for
Water Research and Water Technology in Wiesbaden.
Researchers worldwide have discovered more than 60 different
PPCPs in water sources, according to Christian Daughton, chief
of the Environmental Chemistry Branch of the U.S. Environmental
Protection Agency (EPA) Environmental Sciences Division in
Las Vegas, Nevada. In addition to the drugs noted above, the
list includes antineoplastics, beta-blockers, bronchodilators,
lipid regulators, hypnotics, antibiotics, antiseptics, X-ray
contrast agents, sunscreen agents, caffeine, and fragrances
such as synthetic musks. Most PPCPs are detected at concentrations
ranging from parts per trillion to parts per billion, and
originate in treated and untreated sewage, says Daughton,
who coauthored an article on PPCPs in the December 1999 issue
of EHP Supplements.
North American researchers are just beginning to look at the
issue of PPCPs. Studies presented at the June 2000 Emerging
Issues Conference sponsored by the National Ground Water Association,
held in Minneapolis, Minnesota, indicate that the problem
exists here, too. For example, environmental scientist Chris
Metcalfe of Trent University in Peterborough, Ontario, detected
the drugs aspirin, ibuprofen, indomethacin, bezafibrate (a
cholesterol regulator), and carbamazepine (an anticonvulsant)
in 10 pre- and post-treatment samples from sewage treatment
plants in eastern Canada. The sewage treatment process in
place removed some drugs that were easily biodegradable or
more amenable to removal by activated charcoal, degradative
microbes, or sand filtration, but others were resistant to
degradation.
Metcalfe is just beginning to analyze the effects of cholesterol-lowering
drugs, estrogens, and anticonvulsants on fish in the Great
Lakes. All three drug types can potentially interfere with
normal reproduction and development in fish living downstream
from sewage treatment plants. His laboratory studies show
that estrogen compounds at parts-per-trillion exposures feminize
male fish and disrupt the development of the circulatory system,
eyes, and bladder. He says it's too soon to know whether PPCPs
adversely affect wild fish populations.
In one of the first studies in the United States to report
the occurrence of drugs in drinking water, environmental engineer
Glen Boyd had his students at Tulane University in New Orleans,
Louisiana, sample water from the Mississippi River, a local
lake, and city tap water. Their preliminary experiment targeted
the pain reliever naproxen, the sex hormone estrone, and clofibric
acid, a major bioactive metabolite from certain anticholesterol
drugs. All three were detected at varying concentrations in
most of the samples. "The big unknown," says Boyd, "[is whether
PPCPs] present a health concern now or in the future." He
notes that, although the number of peer-reviewed papers on
the topic is limited, government agencies concerned with water
quality in the United States and professional organizations
serving the water and wastewater communities are beginning
to acknowledge PPCPs as an emerging environmental issue.
The long-term outcome of humans ingesting subtherapeutic doses
of numerous drugs as well as any dose at all of substances
not meant to be ingested remains a major unaddressed issue.
"In areas of water scarcity, we'll see more and more reuse
of treated sewage to meet drinking water needs," predicts
Daughton, thereby increasing the likelihood that PPCPs will
end up in drinking water. Extensive monitoring of the occurrence
of PPCPs and their concentration trends over time is required
to ensure safe water supplies in the future. Then toxicologists
need to determine if the kinds and amounts of PPCPs that occur
affect people and other living creatures. This subject will
require collaboration between the Food and Drug Administration
and the EPA, says Daughton, since the former usually does
not address environmental concerns and the latter generally
does not deal with drug issues. -Carol Potera
To
top of page
Controversy
Swirls around Toilet-to-Tap Project
California officials are receiving a tidal wave of reactions
to a proposition to reclaim wastewater for drinking purposes.
Although officials insist their "toilet-to-tap" program is
a safe solution to California's water shortage problem, several
opponents have voiced concern about health and safety issues.
The project was designed to reduce Los Angeles's dependence
on water from the Mono Lake watershed, and homes in the North
Hollywood area would be the first to receive the reclaimed
water. The proposed project would include a three-year trial
period, during which about 9 million gallons of wastewater
per day would be processed at the Donald C. Tillman Water
Reclamation Plant in the Sepulveda basin and spread for percolation
into potable water aquifers. Five years after the project
begins, after being naturally filtered, the wastewater would
begin to be withdrawn. It would be mixed with groundwater
pumped from wells to be chlorinated and then piped to consumers.
The wastewater would make up about 20% of what pours from
the tap.
Supplementing potable water with reclaimed water is not a
new concept for California. Some 40 cities now use reclaimed
wastewater for urban nonpotable purposes, but not for human
consumption. Finding new methods to reduce water consumption
has become Los Angeles's main focus following a particularly
severe drought in the early 1990s. State officials reduced
the city's allotment of water a few years ago, forcing city
planners to seek alternative sources to meet its growing demands.
Incentives such as volume-based water rates and rebates on
low-flow toilets have helped to reduce the heavy water consumption
considerably, but with the population growth forecasted for
California's future, state officials continue to look for
alternate water resources.
Supporters of the controversial potable reclamation method
say that California was the fourth fastest growing state in
the nation as of 1999, and is expected to continue to have
high growth rates, placing heavy demands on its drinking water
supply. Supporters also claim that natural filtration and
chemical disinfection used together provide reclaimed water
that is cleaner than regular tap water. Paul Gagliardo, the
water research and development manager for the San Diego Water
Department, notes too that existing water supplies have risks
of their own, including contamination with pesticides, heavy
metals, and pathogens such as Giardia. "There has been no
evidence showing any increased incidence of disease on other
successful water reclamation projects," he says.
Those who don't support reclaimed wastewater projects aren't
convinced. Daniel A. Okun, a professor of environmental engineering
at the University of North Carolina at Chapel Hill, says,
"Epidemiological studies are not sufficiently robust to reveal
the connections between the contamination and disease, which
takes decades to show up. [Opponents'] greatest objection
is increased health risk." Okun also remarks that the proposed
method does not include any processes specifically directed
at removing trace organic contaminants, a dangerous omission
in the opinion of many opponents.
The County Sanitary Districts of Los Angeles County conducted
a study of the health impact of drinking reclaimed water from
the Whittier Narrows Water Reclamation Plant, which has been
used to recharge an aquifer in the Montebello Forebay area
since 1962--a project similar to the proposed Los Angeles
project. The study was evaluated by a scientific advisory
panel created by the state of California to advise its regulatory
agencies. In their 1987 Report of the Scientific Advisory
Panel on Groundwater Recharged with Reclaimed Wastewater,
the panel concluded, "[B]efore recharge projects are
undertaken, other alternatives such as nonpotable reuse, conservation,
other nonstructural measures, and modifications to water rights
regulations should be thoroughly evaluated."
Public reaction to the proposal has been mixed. Some people
support it, while others cannot ignore their unease about
the origins of the water. For now, the project is on hold.
To help solve Los Angeles's high water demand, Okun suggests
alternatives such as using reclaimed wastewater for nondrinking
purposes including irrigation, toilet flushing, and industrial
processing. Okun says such uses would save the same volume
of water while eliminating the human health risk. He also
suggests diverting water that is currently being wastefully
used in agricultural irrigation to urban use.
-Lindsey A. Greene Information Technology
To
top of page
FBI
says al-Qaida after water supply
Memo says bin Laden backers scoured
Web for attack ideas
MSNBC STAFF AND WIRE REPORTS
Jan. 31, 2002 The FBI on Wednesday sent a bulletin
to computer security experts around the country indicating
that al-Qaida terrorists may have been studying American dams
and water-supply systems in preparation for new attacks. The
bulletin was sent after U.S. authorities found a computer
belonging to a person with indirect ties to Osama
bin Laden that contained architectural and engineering software
related to dams and other water-retaining structures, according
to the FBI.
They specifically sought information on water supply and wastewater
management practices in the U.S. and abroad.
IN THE BULLETIN, the FBI indicates members of al-Qaida have
scoured the Web in search of methods for gaining control of
water supply facilities and wastewater treatment plants through
the computer networks used by U.S. utility companies.
Existence of the bulletin was first reported by computer security
firm SecurityFocus.com.
The bulletin was not made public, but instead was sent by
the FBIs National Infrastructure Protection Center to
about 3,000 members of the centers InfraGard program,
an information-sharing partnership between the FBI and private
industry, according to SecurityFocus.com.
U.S. law enforcement and intelligence agencies have
received indications that al-Qaida members have sought information
on Supervisory Control And Data Acquisition (SCADA) systems
available on multiple SCADA-related Web sites, reads
the bulletin, according to SecurityFocus. They specifically
sought information on water supply and wastewater management
practices in the U.S. and abroad.
Such systems are used by utility companies and municipalities
to control equipment at unmanned facilities from a central
location. The systems are generally not on the public Internet,
but are connected through dedicated communications channels
that link a control center to hundreds of remote terminal
units. These in turn control water pumps and other equipment.
The FBI did not say where the computer which contained the
architectural and engineering software was found or who owned
it.
The FBI told SecurityFocus that the bulletin is not a full-blown
alert.
"It just says be on the lookout, FBI supervisory special
agent Steven Berry told the Web site.
Theres some information that suggests that they
[al-Qaida] are looking at this... There are potential interests
in water supplies, and other infrastructures.
Remote control of water or sewage plants is not merely a hypothetical
concern. Two years ago, a frustrated computer hacker, seeking
retribution for being fired, caused treatment plants in Queensland,
Australia to overflow. The break-in caused millions of gallons
of raw sewage to be dumped into creeks and parks on the Sunshine
Coast, a popular tourist and holiday destination.
And there have been incidents of accidental water contamination
that have been deadly in the past.
Two years ago, seven people died and more than 2,300 became
sick after bacteria infiltrated water pipes following torrential
rains in Walkterton, Ontario, Canada. In 1993, dozens died
and about 400,000 fell sick when a rare parasite named cryptosporidium
tainted the water supply of Milwaukee, Wis.
However, some in the water industry say intentionally wreaking
havoc with the countrys water supply is far easier said
than done. Poisoning a reservoir poses immense logistical
problems immense amounts of poison or bacteria would
have to be dropped into a water basin to counteract the effects
of dilusion, says Dr. Tom Walski, Vice President of Engineering
at Haestad Methods. His firm makes software that can be used
by plants to simulate a water supply contamination incident.
While Walski concedes remote computer control of plants by
a hacker is feasible, the threat wouldnt rise beyond
the level of a serious prank.
The kind of things you can do is shut off pumps, flood
pipes, so the system wouldnt work well that day. Not
the kind of thing where you kill people, Walski said.
These are more nuisance problems.
"Raw" water systems
Water intakes
Water treatment
Water distribution
Interlocking Dependencies
The nation's water system is a delicate balance of interlocking
components that includes: the water supply system (dams, reservoirs,
wells, etc.); water treatment system; and the water distribution
system (pipes, pumps storage tanks, etc.). These systems are
mostly aging and in urgent need of upgrading, not simply to
bolster them from terrorist attack but to keep them adequately
handling the growing water needs of the 21st Century.
Although water authorities have contingency plans, the truth
is most haven't made complete vulnerability assessments. Click
on the topics above for a look at the various parts of our
water system and their risks. "Raw" water systems: these include
reservoirs, lakes or rivers. Likelihood of contamination is
low given that several freighter cars of toxin would have
to be dumped into the supply for any effect. Even then the
massive dilution effect of the raw water supply is the best
defense. However, such systems are nearly impossible to completely
physically secure, leaving them vulnerable to such attacks.
Risk: lowWater intakes: The potential for contamination increases
as water dilution decreases, and such is the case for water
intakes. There are 6,800 public supply drinking water intakes
on rivers alone in the U.S. Likewise, intakes at the mouths
of reservoirs or lakes are also vulnerable targets. Contaminates
introduced at the intakes have a far better chance of reaching
the population than if introduced elsewhere. Real-time monitoring
equipment can help forestall this threat. Risk: medium Water
treatment: Here the physical assets of the facility are at
risk. The supervisory control and data acquisition (SCADA)
computer systems also are a concern, experts say. SCADA allow
remote control operations and monitor system status. Pull
a SCADA system offline and the facility is "blind" to any
possible contaminate in the water. Risk: high Water distribution:
This component of the water supply is the most vulnerable.
Pipelines wander for thousands of unprotected miles; aqueducts
snake through largely unpopulated areas. A person with a crude
knowledge of hydraulics and a bicycle tire pump and access
to a kitchen faucet could introduce toxins into any local
water distribution system, thus endangering thousands. There
are few robust security methods in place to protect these
distribution systems. Risk: very highInterlocking Dependencies:
The water system is dependent on other critical infrastructures,
such as the electrical grid, to help move water through the
system. If the electrical grid fails it could domino into
the water system causing disaster there, too. Some water authorities
have installed back-up generators; however, many large systems
haven't. Any disruption to the chemical and transportation
industries also puts the water supply system at risk. Water
authorities need chemicals to treat the water and trucks or
railroads to get them the chemicals. Risk: medium
Sources: Various water-industry experts, reports
In addition to the utility
company warnings, the NIPC bulletin released Wednesday noted
al-Qaida interest in insecticides and pest control products
at several Web sites.
Also according to the bulletin, a computer belonging to a
bin Laden associate was found to contain structural architecture
computer programs, including AutoCAD, CATIGE, Microstran and
BEAM, that suggested the individual was interested in
structural engineering as it related to dams and other water-retaining
structures.
The same unnamed individual had a program used to identify
soil types using the Unified Soil Classification System, according
to the bulletin.
Earlier this month, a number of water supply experts conceded
to MSNBC.com that the countrys 54,065 public and private
water systems were indeed vulnerable.
Although recognized in the past, the vulnerability of
our water systems to deliberate acts has not received sufficient
attention, said Richard Luthy, chair of the Water Science
and Technology Board of the National Research Council, in
congressional testimony last year. The reasons include
the fact that simply developing and maintaining our existing
water system received primary attention, he said.
U.S. water supply vulnerable
The darker angels of the water security issue are old, crumbling
pipelines and treatment plants. The reality is that
many components of our water systems are aging and need repairs,
replacement, or upgrades, Luthy told Congress.
The Association of Metropolitan Water Agencies has asked Congress
for $57 billion over a five year period targeted at drinking
water and wastewater infrastructure.
MSNBC.coms Bob Sullivan and the Associated Press contributed
to this report.
To
top of page
Outbreaks
of The Toxic Pfiesteria Piscicida Micororanism
By Jeff Rubin
ABCNEWS.com
Oct. 9, 2001
For the past 25 years, U.S.
states have flouted a powerful provision of the federal Clean
Water Actand that neglect may have contributed to the
recent outbreaks of the toxic Pfiesteria piscicida microorganism,
the National Wildlife Federation says.
Pfiesteria is blamed for killing millions of fish in Maryland,
Virginia and North Carolina, and is suspected of causing illnessincluding
short-term memory lossin people.
Specifically, states have not protected their water suppliesas
they are required by law to dofrom airborne pollutants,
runoff from farms and overflows from city storm drains, the
environmental group says in a new report.
Addressing Only Half the Act After the Clean Water Act became
law in October 1972, most states put in place tough controls
The NWF report follows last weeks dismaying, first assessment
by the EPA of the more than 2,000 watersheds in the United
States. The EPA said that only 16 percent of the watersheds
have good water quality and more than half face problems,
21 percent of them serious problems.
To
top of page
2000
KANSAS WATER QUALITY ASSESSMENT
(305(b) REPORT)
KDHE Home - Division of Environment
- BEFS - 2000 KS Water Quality
------------------------------------------------------------------------
March 31, 2000
Kansas Department of Health and Environment, Division of Environment
Bureau of Environmental Field Services
Forbes Field, Building 283, Topeka, Kansas 66620-0001
* Part I: Executive Summary/Overview
* Part II: Background
* Part III: Surface Water Assessment
* Part IV: Groundwater
* Appendix A: TSS Concentrations in Kansas Basins (link to
image)
* Appendix B: Stream Assessment Protocol (link to image)
* Appendix C: Clean Lakes and Wetlands
This report, the 2000Kansas Water Quality Assessment, also
known as the 305(b) Report, is the biennial assessment of
the state's surface water quality as required by 33 USC 466
et seq, the Federal Water Pollution Control Act, commonly
referred to as the Clean Water Act. The guidance by U. S.
Environmental Protection Agency (EPA) for the preparation
of this report provided three options for reporting. The Kansas
Department of Health and Environment (KDHE) elected the second
option which is to provide in even years, an electronic report
accompanied by an abbreviated narrative report. The abbreviated
narrative report contains only the information required by
law that has changed from the last report (1998 Kansas Water
Quality Assessment (305(b) Report), April 1998) and a simple
reference to that report.
The Kansas Department of Health and Environment assessed the
water quality for the period of 1998 -1999, of 18,236 miles
of streams, all of which were considered monitored. This report
represents an increase assessment of 2,616 miles from the
1998 305(b) Report. This increase in assessed miles is due
to: 1) differences in mileage associated with rotational sites,
and 2) increased monitoring in the Marais des Cygnes and Missouri
River Basin in support of the establishment of Total Maximum
Daily Loadings (TMDLs). A total of 188,508 lake acres were
assessed. Of these, 175,454 acres were monitored and the conditions
of an additional 13,052 lake acres were evaluated using best
professional judgment.
The 2000 Kansas Water Quality Assessment Report includes two
years of data (1998-1999) and only acute aquatic life use
support application. This assessment is consistent with the
1998 US EPA guidance and reflects the manner in which most
states have prepared past 305(b) reports. The assessments
contained in this report are consistent with the application
of the numeric 1999 Kansas surface water quality standards
with the exception of total suspended solids where a basin
summary is included for streams for the two year period.
The major causes of nonsupport for streams, in order of prevalence,
are pathogen indicators (fecal coliform), organic enrichment,
sulfates, chlorides, and metals. The major causes for lake
impairments were sediments, turbidity, nutrients/eutrophication,
and taste and odor problems
Sources responsible for widespread pollutant loadings and
beneficial use impairments of streams include agriculture
(non-irrigated and irrigated crop production, and intensive
animal feeding operations), natural sources, habitat modification,
municipal point sources, and groundwater withdrawal. Major
sources for lake impairment included natural sources and agriculture.
Of the assessed lake acreage in Kansas, 53% were stable over
time, while slightly more than 27% appeared to be undergoing
measurable eutrophication over time. Almost twelve percent
of total lake acres showed appreciable improvement in trophic
state condition during this reporting cycle. Municipal point
sources, natural sources, and agriculture were the primary
contributing factors to lake eutrophication.
The changes from the 1998 305(b) Report in the cumulative
mileage rated as partially and fully supporting may be attributable
to random fluctuations in climatological conditions. Specifically,
increased rainfall and/or the number of rainfall events may
have intensified nonpoint source impacts on water quality.
Other variables may include application of total recoverable
metal criteria throughout the entire state and the change
in rotational sites assessed during this reporting period.
Because of the use of rotational site no comparison can be
made with the 1998 305(b) Report.
High nitrate concentrations accounted for about 76% of the
documented exceedences of the federal drinking water maximum
contaminant levels (MCLs) during 1997 and 1999 for the groundwater
monitoring network. The majority of the samples with excessive
levels of nitrate were obtained from shallow wells (less than
100 feet) or in wells located in areas of sandy soil and high
water tables. Other isolated concerns of groundwater contamination
included the presence of volatile organic compounds, heavy
metals, petroleum products and/or bacteria. The major sources
of these contaminants included active industrial facilities,
spills, leaking storage tanks, mineral extraction activities,
and agricultural activities.
In Kansas, approximately 68% of public water supplies use
groundwater as their only source of water. Five percent of
public water supplies use a combination of groundwater and
surface water. The majority of MCL violations of public water
supplies were due to high levels of bacteria and nitrate.
The bacteria exceedences observed are not considered to be
reflective of ambient groundwater.
The imposition of more stringent permits limits and the resulting
upgrades of municipal and industrial wastewater treatment
facilities continue to result in notable improvements in surface
water quality. As the number of point sources causing or contributing
to significant water quality impairments continues to decline,
future attention will necessarily shift to the remaining sources,
primarily nonpoint source related water quality problems.
It is anticipated that watershed pollution control efforts,
predicated on the development of TMDLs and on the allocation
of allowable pollutant loadings among point, nonpoint, and
natural sources, will play an increasingly important role
in the abatement of surface water pollution and improvement
in water quality in Kansas. By June 30, 2000 Kansas will have
established TMDLs for 48% of the water bodies listed in the
1998 Kansas 303(d) List.
To
top of page
Roanoke
considers ultraviolet treatment system at Crystal Spring
Roanoke considers ultraviolet treatment system at Crystal
Spring
Light may ease water shortage
The state Health Department remains cautious about Roanoke
using UV equipment on drinking water.
By TODD JACKSON
THE ROANOKE TIMES
Man-made, high-powered sunshine could be used to increase
Roanoke's dwindling water supply, but the drought must increase
in severity first, according to the state Health Department.
On Monday, city council approved an emergency plan that would
increase the city's water supply as soon as possible by about
6 million gallons a day. The most significant aspect of the
plan would allow the city to use its second largest water
source, Crystal Spring, sooner than expected.
Crystal Spring was shut down two years ago because of contamination
issues, and a state-approved treatment plant improvement is
under construction.
The $6 million microfiltration system upgrade is expected
to be finished in December.
But with hot weather looming and the drought expected to continue,
the city is scrambling to find a way to use the spring water
right away.
If the city could use Crystal Spring's 4 million gallons of
water a day, it could reduce the draw from its main Carvins
Cove reservoir by about one-third.
The city wants to use ultraviolet light temporarily to help
treat the spring water . Roanoke would be the first locality
in Virginia to use the technology as a daily drinking water
treatment, state officials said.
UV treatment is not new, though - it's been used in Virginia
by wastewater plants for years, and the technology is being
used to treat drinking water in many states.
"It's a case where the technology is ahead of the regulations,"
city Utilities Director Mike McEvoy said.
The city asked the Virginia Health Department about the use
of UV months ago, but the state remains cautious about Roanoke
using UV equipment on drinking water because of Virginia's
lack of a track record and the viability of Roanoke's other
water options, said Ron Conner, local field director for the
health department's Lexington office.
The Health Department will likely approve Roanoke's use of
UV, but only as a supplement to Crystal Spring's traditional
treatment system that mainly uses chlorine as a disinfectant,
Conner said.
Also, the water level at Carvins Cove will have to drop to
30 feet below capacity before the UV treatment will become
an option, he said.
At that point, the cove would be lower than it has ever been
and Roanoke would have already implemented several other options.
The cove water level was 23.8 feet below capacity Tuesday.
"Obviously, the sticking point is when we'll turn Crystal
Spring on," McEvoy said. "The health department says 30 feet.
We'd like to do it at 26."
If the cove level drops to 26 feet below capacity, the city
will impose a Roanoke-wide, mandatory outdoor watering ban
and will also begin buying up to 4 million gallons of water
a day from Roanoke County - sound actions that the Health
Department believes should be implemented before the UV option,
Conner said.
State and city officials could have an agreement in place
so the city could immediately turn on the spring when the
cove level hits the 30-foot low mark, he said.
The city proposes to rent UV equipment that's being used successfully
elsewhere in the United States.
"It works," said Joe Dinkel, the assistant director of Pennsylvania's
West View Water Authority.
The authority operates the largest UV treatment system in
the country based on daily water usage, Dinkel said. West
View, which treats more water than Roanoke on a daily basis,
has been using UV for about a year. Dinkel said it's one of
several treatment procedures the authority uses.
"It's only an additional barrier," he said.
The UV renders harmless the potentially deadly waterborne
micro-organisms such as giardia and cryptosporidium.
Simply put, at West View many UV bulbs are placed strategically
in distribution pipes and the light zaps the water as it flows
through the system. The technology scrambles the microorganisms'
DNA so they cannot reproduce, which is how they harm the human
body.
The UV technology is usually cheaper than other treatment
systems, Dinkel said.
The West View authority looked at options that cost as much
as $20 million, and the UV system, which cost about $600,000,
he said.
To top
of page
Five
Hidden Dangers of Your Morning Shower
U.S. News & World Report - July
29, 1991 -
Is Your Water Safe - The Dangerous State of
Your Water!
Five Hidden Dangers of Your Morning Shower
Chlorine: Added to all municipal water supplies, this disinfectant
hardens arteries, destroys proteins in the body, irritates
skin and sinus conditions, and aggravates asthma, allergies,
and respiratory problems.
Chloroform: This powerful by product of chlorination causes
excessive free radical formation (accelerated aging!), normal
cells to mutate, and cholesterol to oxidize. Its a known
carcinogen!
DCA (Dichloro acetic acid): This chlorine byproduct alters
cholesterol metabolism and has been shown to cause liver cancer
in lab animals.
MX (another chlorinated acid): Another byproduct of chlorination,
MX is known to cause genetic mutations that can lead to cancer
growth and has been found in all chlorinated water for which
it was tested.
Proven cause of bladder and rectal cancer: Research has proven
that chlorinated water is the direct cause of 9% of all bladder
cancers and 15% of all rectal cancers in the US.
Dear Reader,
You wouldnt knowingly bathe in toxins every morning
... or set out to ravage your lungs and sinuses, irritate
your allergies, aggravate your skin, or ... perhaps most horrifying
of all...
- Willingly increase your risk of cancer... would you? -
Of course not. But the fact is, the chlorine in your shower
water is a powerful toxin --- deadly to bacteria and fungi,
and poison for your body.
You absorb more chlorine in a 10-minute shower than by drinking
8 glasses of the same water!
Tests show that your skin, the largest organ of your body,
can absorb more chlorine as a result of a 10 minute shower
than if you drank 8 glasses of the same water. How can that
be?
A warm shower opens up your pores, causing your skin to act
like a sponge. As a result, you not only inhale the chlorine
vapors, you also absorb them through your skin, directly into
your blood-stream -- at a rate thats up to six times
higher than drinking the water.
In terms of cumulative damage to your health, showering in
chlorinated water is one of the most dangerous risks you take
every day. In the short term, chlorinated shower water irritates
your eyes, your sinuses, your throat, your skin, and your
lungs. Long term risks include excessive free radical formation
(which makes you age faster), higher vulnerability to genetic
mutation and cancer development, difficulty metabolizing cholesterol
and hardened arteries.
Showering in chlorine-treated water is a serious risk ---
but its also one of the very few
risks you can erase immediately. And its up to you to
protect yourself.
100 years of cancer in the making
For almost 100 years, chlorine has been added to disinfect
our municipal water supply. The level of chlorine in your
area depends on the quality of your water supply, but even
if theres no noticeable taste or smell, the chlorine
is present, as are the byproducts of chlorination, which include
some of the most potent carcinogens known.
Research conducted jointly at Harvard University and the Medical
College of Wisconsin found that chlorinated water was the
direct cause of 9% of all bladder cancers and 15% of all rectal
cancers in the U.S.
Theres also evidence that chlorine destroys protein
in your body. As Im sure youre already aware,
this disinfectant / bleach makes your hair and scalp dry,
worsens dandruff and ruins tinted or chemically treated hair.
But what you may not know is that if you suffer from any of
the following, chlorinated water makes your condition worse.
sinus conditions
allergies
skin rashes
emphysema
But thats just for starters.
More hazards of chlorinated water
When chlorine reacts with the organic matter already present
in water (humus, the organic material formed from plant decay),
toxic byproducts are formed. Chloroform, for example, causes
cells to mutate and cholesterol to oxidize. Once used as an
anesthetic, chloroform was banned by the FDA in 1976 when
it was discovered to cause cancer.
Even if theres no noticeable taste or smell, the
chlorine is present, as are the byproducts of chlorination,
which include some of the most potent carcinogens known.
Another byproduct, MX. is considered the single largest
contributor to the mutagenic potential (the ability
of a substance to cause genetic mutations) of our municipal
water supply, according to the Environmental Protection Agency.
MX has shown up in every chlorinated water source for which
it has been tested. DCA, another mutagen, alters cholesterol
metabolism and has shown to cause liver cancer in lab animals.
The evidence is clear. The risks are tremendous. The advice
is simple: Stop chlorinating your body!
To top
of page
|
Product
Testing & Certification
|
NSF
International continues to gain recognition by consumers,
health officials and the drinking water industry as the independent,
third-party certifier for the drinking water treatment industry.
|
It
is NSF International that establishes the consensus
standards and testing protocol for drinking water treatment
devices used by all other testing laboratories. And
only NSF provides the consumer complete assurance that
the product they purchase which is "NSF Certified"
will perform in accordance with the manufacturer's claim.
More consumers than ever rely on NSF testing and certification
to evaluate products available on the marketplace. To
provide a meaningful comparison, it is important that
the consumer understand the standards that were developed
by NSF International, and adopted by many states, for
drinking water treatment devices.
|
|
NSF
STANDARD 42*
|
|
Claims
for taste, odor, color and other aesthetic effects;
including the reduction of chlorine and particulate
matter fall, under NSF Standard 42. Several classes
are used to define the level of chlorine reduction.
The classes are as follows:
|
|
1. Taste, odor
and chlorine reduction.
|
Chlorine
is widely used by municipalities for water disinfection. However,
chlorine in water has been shown to produce undesirable taste
and odor as well as Trihalomethanes, a known carcinogen. Certified
drinking water treatment devices have been categorized into
the following categories based on effective reduction of chlorine
throughout the life of the device:
CLASS
I Reduces chlorine by 75% to 100%*
CLASS
II Reduces chlorine by 50% to 74%
CLASS
III Reduces chlorine by 25% to 49%
Only
purchase a drinking water system that is certified CLASS
I.
|
|
2. Particulate
reduction.
|
Particulate
matter found in drinking water makes the water appear cloudy
or turbid. Drinking water systems Certified for particulate
reduction have demonstrated, through testing, that they reduce
specified sized particles. Drinking water systems are certified
as meeting one of the following categories:
CLASS
I 0.5 to 1 micrometers (sub micron)
CLASS
II 1 to 5 micrometers (extra-fine)*
CLASS
III 5 to 15 micrometers (medium-fine)
CLASS
IV 15 to 30 micrometers (fine)
CLASS
V 30 to 50 micrometers (medium coarse)
CLASS
VI 50 micrometers or larger (coarse)
Only
purchase a drinking water system that is Certified CLASS
I or II.
|
|
NSF
STANDARD 53*
|
Claims for the reduction
of specific contaminants from drinking water (public or private),
such contaminants being considered as established or potential
health hazards, such hazardous contaminants may be microbiological,
chemical or particulate (including filterable cysts in nature.
It is recognized that a unit may be effective in controlling
one or more of the contaminants, but it is NOT A REQUIREMENT
that it control all of these contaminants. The specific contaminant
challenged would be included in the listing under Standard
53. Included under this standard are:
|
|
|
Chemicals and
heavy metals*:
|
|
Includes chemical
and heavy metal contaminants such as lead; lindane;
2,4,-D; asbestos; trichloroethane and others.
|
|
Volatile organic
chemicals (VOCs):
|
VOCs are chemicals that
vaporize easily from water into air. They are delivered from
a variety of solvents, insecticides, household cleaning compounds,
industrial wastes and underground storage tanks.
|
|
|
|
|
A condition caused
by the presence of suspended and/or colloidal matter.
Increased turbidity in water also decreases the effectiveness
of chlorination or other types of disinfection.
|
|
|
|
Cysts are capsules
resistant to chlorine containing single cell parasites
that may cause disease with symptoms of severe abdominal
cramping and diarrhea if ingested. The most common cysts
are Giardia Lamblia and Cryptosporidium that are excreted
by animals. These two cysts are found in drinking water
supplies that use surface water as the primary source.
|
|
Total Trihalomethanes
(TTHMs):
|
|
TTHMs are most
prevalent in chlorinated surface water supplies. Decomposition
of leaves, wood, grass and mineral waste can result
in the formation of humic compounds. TTHMs form when
organic compounds combine with chlorine and have been
found to cause cancer.
|
|
|
These chemicals may
end up in the drinking water as a result of misapplication
of agricultural chemicals, spills or industrial discharge
during manufacturing.
NSF
Standard 55 covers Ultraviolet Drinking Water Systems. The
specific contaminants tested for under this Standard are:
|
Disinfection,
Class A
Designed for the disinfection of microbiologically
contaminated water that meets all other public health
standards. Not intended for treatment of water that
has an obvious contamination source, such as raw sewage;
nor is it intended to convert wastewater into safe
drinking water. This type of system is intended to
be installed on visually clear water.
|
Disinfection,
Class B *
This type of system contains ultraviolet lamps that
require replacement at intervals in accordance with
the manufacturer's instructions. It is designed for
the supplemental bactericidal treatment of either
treated and disinfected public drinking water or other
drinking water which has been tested and deemed acceptable
for human consumption by the state or local health
agency having jurisdiction. The system is designed
to reduce normally occurring non-pathogenic or nuisance
microorganisms only.
|
NSF Standard 58 covers
Reverse Osmosis Drinking Water Systems. The specific contaminants
tested for under this standard are:
|
Barium
Cadmium
|
Fluoride
Hexavalent
Chromium
Lead
|
Radium 226/228
Selenium
|
| |