Atrazine and Your Drinking Water
On Saturday, March 22, 2003 the Poughkeepsie Journal printed an article stating that the City of Poughkeepsie Drinking Water contains Atrazine. The statement was based upon a presentation by Patrick Phillips of the USGS in which Mr. Phillips stated that he has found Atrazine in Hudson River water up to a concentration of 0.5 micrograms per liter (ug/L).
Atrazine is a widely used herbicide for control of broadleaf and grassy weeds. Atrazine is a regulated drinking water contaminate with a Maximum Contaminate Level of 3 ug/L or six (6) times greater than the maximum concentration found in the Hudson River by Mr. Phillips. EPA set the limit of 3 ug/L because they have determined that drinking water containing 3 ug/L or less would not cause any health effects.
The Poughkeepsies’ Water Treatment Facility tests annually for Atrazine to a detection limit of 0.1 ug/L and has never detected this chemical in your drinking water.
Results of the 1992 sampling indicated that 50% of City Customers had lead levels exceeding the drinking water action level of 15 µg/l (micrograms per liter). In March 1997, we started adding orthophosphoric acid to our water and since that time, customers lead levels have dropped significantly as can be seen in the following figure. In 2004, 90% of the samples were below 15 µg/L.
Although most homes have very low levels of lead in their drinking water, some homes in the community have lead levels above the EPA action level of 15 parts per billion (PPB), or 0.015 milligrams of lead per liter of water (mg/L). Under Federal law we are required to have a program in place to minimize lead in your drinking water by January 1, 1996. This program includes corrosion control treatment, source water treatment, and public education. We are also required to replace each lead service line that we control if the line contributes to lead concentrations of 15 ppb or more after we have completed the comprehensive treatment program. If you have any questions about how we are carrying out the requirements of the lead regulations, please callRandy Alstadt, Water Plant Administrator, at 845-451-4173 x16. The following explains why we are concerned about lead and some simple steps you can take to protect you and your family by reducing your exposure to lead in drinking water.
1. Health Effects on Lead
Lead is a common, natural, and often useful metal found throughout the environment in lead-based paint, air, soil, household dust, food, and certain types of pottery, porcelain, pewter, and water. Lead can pose a significant risk to your health if too much of it enters your body. Lead builds up in the body over many years and can cause damage to the brain, red blood cells, and kidneys. The greatest risk is to young children and pregnant women. Amounts of lead that won’t hurt adults can slow down normal mental and physical development of growing bodies. In addition, a child at play often comes into contact with sources of lead contamination – like dirt and dust- that rarely affect an adult. It is important to wash children’s hands and toys often, and to try to make sure they only put food in their mouths.
(i) Lead in drinking water, although rarely the sole cause of lead poisoning can significantly increase a person’s total lead exposure, particularly the exposure of infants who drink baby formulas and concentrated juices that are mixed with water. The EPA estimates that drinking water can make up to 20 percent or more of a person’s total exposure to lead.
(ii) Lead is unusual among drinking water contaminants in that it seldom occurs naturally in water supplies like rivers and lakes. Lead enters drinking water primarily as a result of the corrosion, or wearing away, of materials containing lead in the water distribution system and household plumbing. These materials include lead-based solder used to join copper pipe, brass and chrome plated brass faucets, and in some cases, pipes made of lead that connect your house to the water main (service lines). In 1986, Congress banned the use of lead solder containing greater that 0.2% lead and restricted the lead content of faucets, pipes, and other plumbing materials to 8.0%.
(iii) When water stands in lead pipes or plumbing systems containing lead for several hours or more, the lead may dissolve into your drinking water. This means the first water drawn from the tap in the morning or later in the afternoon after returning from work or school can contain fairly high levels of lead.
(i) Despite our best efforts mentioned earlier to control water corrosivity and remove lead from the water supply, lead levels in some homes or buildings can be high. To find out whether you need to take action in your own home, have your drinking water tested to determine if it contains excessive concentrations of lead. Testing the water is essential because you cannot see, taste, or smell lead in drinking water. Some local laboratories that can provide this information are listed at the end of this booklet. For more information on having your water tested, please call 845-451-4173.
(ii) If a water test indicates that the drinking water drawn from a tap in your home contains lead above 15 ppb, then you should take the following precautions:
(A) Let the water run from the tap before using it for drinking or cooking any time the water in a faucet has gone unused for more than six hours. The longer water resides in your home’s plumbing the more lead it may contain. Flushing the tap means running the cold water faucet until the water gets noticeably colder, usually about 15-30 seconds. If your house has a lead service line to the water main, you may have to flush the water for a longer time, perhaps one minute before drinking. Although toilet flushing or showering flushes water through a portion of your home’s plumbing system, you still need to flush the water in each faucet before using it for drinking or cooking. Flushing tap water is a simple and inexpensive measure you can take to protect your family’s health. It usually uses less than one or two gallons of water and costs less than .42 cents per month. To conserve water, fill a couple of bottles for drinking water after flushing the tap, and whenever possible use the first-flush water to wash the dishes or water the plants. If you live in a high-rise building, letting the water flow before using it may not work to lessen your risk from lead. The plumbing systems have more and sometimes larger pipes than smaller buildings. Ask your landlord for help in locating the source of the lead and for advice on reducing the lead level.
(B) Try not to cook with or drink water from the hot water tap. Hot water can dissolve more lead more quickly than cold water. If you need hot water, draw water from the cold tap and heat it on the stove.
(C) Remove loose lead solder and debris from the plumbing materials installed in newly constructed homes or homes in which the plumbing has recently been replaced by removing the faucet strainers and flush out any debris that has accumulated over time.
(D) If your copper pipes are joined with lead solder that has been installed illegally since it was banned in 1986, notify the plumber who did the work and request that he or she replace the lead solder with lead-free solder. Lead solder looks dull gray, and when scratched with a key looks shiny. In addition, notify the Dutchess County Health Department about the violation.
(E) Determine whether or not the service line that connects your home or apartment to the water main is made of lead. The best way to determine if your service line is made of lead is by either hiring a licensed plumber to inspect the line or by contacting the plumbing contractor who installed the line. You can identify the plumbing contractor by checking the city’s record of building permits, which should be maintained in the files of the City of Poughkeepsie Building Department. Licensed plumbers can at the same time check to see if your home’s plumbing contains lead solders; lead pipes, or pipe fittings that contain lead. The public water system that delivers water to your home should also maintain records of the materials located in the distribution system. If the service line that connects your dwelling to the water main contributes more than 15 ppb to drinking water, after our comprehensive treatment program is in place, we are required to replace the line. If the line is only partially controlled by the City of Poughkeepsie, we are required to provide you with information on how to replace your portion of the service line, and offer to replace that portion of the line at your expense and take a follow-up tap water sample within 14 days of the replacement. Acceptable replacement alternatives include copper, steel, iron and plastic pipes.
(F) Have an electrician check your wiring. If grounded wires from the electrical system are attached to your pipes, corrosion may be greater. Check with a licensed electrician or your local electrical code to determine if your wiring can be grounded elsewhere. DO NOT attempt to change the wiring yourself, because improper grounding can cause electrical shock and fire hazards.
(iii) The steps described above will reduce the lead concentrations in your drinking water. However, if a water test indicates that the drinking water coming from your tap contains lead concentration in excess of 15 ppb after flushing or after we have completed our actions to minimize lead levels, then you may want to take the following additional measures:
(A) Purchase or lease a home treatment device. Home treatment devices are limited in that each unit treats only the water that flows from the faucet to which it is connected, and all of the devices require periodic maintenance and replacement. Devices such as reverse osmosis systems or distillers can effectively remove lead from your drinking water. Some activated carbon filters may reduce lead levels at the tap; however, all lead reduction claims should be investigated. Be sure to check the actual performance of a specific home treatment device before and after installing the unit.
(B) Purchase bottled water for drinking and cooking.
(iv) You can consult a variety of sources for additional information. Your family doctor or pediatrician can perform a blood test for lead and provide you with information about the health effects of lead. State and local government agencies that can be contacted include:
(A) The Poughkeepsies’ Water Treatment Facility at 845-451-4173 can provide you with information about your community’s water supply and a list of local laboratories that have been certified by EPA for testing water quality;
(B) The City of Poughkeepsie Building Department at 845-451-4007 can provide you with information about building permit records that should contain the names of plumbing contractors that plumbed your home; and,
(C) The Dutchess County Health Department at 845-486-3404 can provide you with information about the health effects of lead and how you can have your child’s blood tested.