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Drinking Water Contaminants- Tetrachloroethylene (PCE)

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This is a factsheet about a chemical that may be found in some public or private drinking water supplies. It may cause health problems if found in amounts greater than the health standard set by the United States Environmental Protection Agency (EPA). What is Tetrachloroethylene and how is it used? Tetrachloroethylene (PCE) is a colorless organic liquid with a mild, chloroform-like odor. Its greatest use is in the textile industry, and as a component of aerosol dry-cleaning products. The list of trade names given below may help you find out whether you are using this chemical at home or work. Trade Names and Synonyms: Ethylene tetrachloride Perchloroethylene PCE Ankilostin Didakene Fedal-un Nema Perclene Persec Tetlen Tetracap Tetraleno Tetropil Antisal 1 Dow-per Perawin Perchlor Percosolv Perk Perklone Tetraguer Tetralex Tetravec Why is Tetrachloroethylene being Regulated? In 1974, Congress passed the Safe Drinking Water Act. This law requires EPA to determine safe levels of chemicals in drinking water which do or may cause health problems. These non-enforceable levels, based solely on possible health risks and exposure, are called Maximum Contaminant Level Goals. The MCLG for PCE has been set at zero because EPA believes this level of protection would not cause any of the potential health problems described below. Based on this MCLG, EPA has set an enforceable standard called a Maximum Contaminant Level (MCL). MCLs are set as close to the MCLGs as possible, considering the ability of public water systems to detect and remove contaminants using suitable treatment technologies. The MCL has been set at 5 parts per billion (ppb) because EPA believes, given present technology and resources, this is the lowest level to which water systems can reasonably be required to remove this contaminant should it occur in drinking water. These drinking water standards and the regulations for ensuring these standards are met, are called National Primary Drinking Water Regulations. All public water supplies must abide by these regulations. What are the Health Effects? Some people who drink water containing tetrachloroethylene in excess of the MCL over many years could have problems with their liver and may have an increased risk of getting cancer. How much Tetrachloroethylene is produced and released to the environment? Production of tetrachloroethylene was 405 million lbs in 1986. Major releases of tetrachloroethylene to air and water are from dry cleaning and industrial metal cleaning or finishing. Water pollution can occur from tetrachloroethylene leaching from vinyl liners in some types of pipelines used for water distribution, and during chlorination water treatment. From 1987 to 1993, according to EPA's Toxic Chemical Release Inventory, tetrachloroethylene releases to land and water totalled over 1 million lbs. These releases were primarily from alkali and chlorine industries which use it to make other chemicals. The largest releases occurred in Louisiana and South Carolina. What happens to Tetrachloroethylene when it is released to the environment? PCE released to soil will readily evaporate or may leach slowly to the groundwater. Its break down by soil microbes is slow. PCE released to water will primarily evaporate and has little potential for accumulating in aquatic life. How will Tetrachloroethylene be Detected in and Removed from My Drinking Water? The regulation for tetrachloroethylene became effective in 1992. Between 1993 and 1995, EPA required your water supplier to collect water samples every 3 months for one year and analyze them to find out if PCE is present above 0.5 ppb. If it is present above this level, the system must continue to monitor this contaminant until the system has taken immediate steps to remediate the problem or the State has determined that the contaminant will remain reliably and consistently below the MCL. If contaminant levels are found to be consistently above the MCL, your water supplier must take steps to reduce the amount of PCE so that it is consistently below that level. The following treatment methods have been approved by EPA for removing PCE: Granular activated carbon in combination with Packed Tower Aeration. How will I know if Tetrachloroethylene is in my drinking water? If the levels of PCE exceed the MCL, 5 ppb, the system must notify the public via newspapers, radio, TV and other means. Additional actions, such as providing alternative drinking water supplies, may be required to prevent serious risks to public health. Drinking Water Standards: Mclg: zero Mcl: 5 ppb Tetrachloroethylene Releases to Water and Land, 1987 to 1993 (in pounds):   Water Land TOTALS (in pounds) 297,602 750,104 Top Ten States* LA 23,639 610,518 SC 104,728 0 NH 62,150 0 NC 42,192 13,102 IL 0 40,500 TX 36,144 720 OH 0 32,170 IN 1,300 27,000 CO 0 11,000 IA 5,112 0 Major Industries* Alkalis, chlorine 63,472 611,242 Leather tanning,finishing 62,150 0 Cotton fabric finishing 51,577 0 Misc textile finishing 48,082 2,000 Knit outwear mills 45,808 0 Misc. apparel, access. 0 40,500 Transportation Equip. 3,750 27,000 Ammunition 0 20,575 Misc Chem. preparations 0 11,102 Petroleum refining 0 11,000 Ordnance, accessories 0 10,100 * Water/Land totals only include facilities with releases greater than a certain amount - usually 1000 to 10,000 lbs.   As part of the Drinking Water and Health pages, this fact sheet is part of a larger U.S. EPA publication: EPA National Primary Drinking Water Regulations

We at reverse-osmosis-water-filter-guide.com is dedicated to help you find the best reverse osmosis drinking water filter systems. Our site discuss the "must-read" of buying reverse osmosis filters, topics including:

• How to find a top quality reverse osmosis water filter..the facts you need to know before you buy
• Reviews of different water filtration methods and of major brands/configurations of reverse osmosis water filters
• How to test your water so you know your reverse osmosis system is working in its top condition.
• Is bottled water really the safest? How does it compare to reverse osmosis purification systems?
• What are the different types of bottled water and their quality? What type of drinking water is the safest and healthiest
• Does your area have a water pollution problem? How many and which contaminants can reverse osmosis filters effectively remove?
• How do reverse osmosis filters give you the purest water? Reverse osmosis filtration technology explained in detail.
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Editor's Note: Do You Know What's In The Water That You're Drinking?
In 1993, the City of Milwaukee Wisconsin experienced a sad tragic event. People died from contamination in the public water supply. Cryptosporidium cysts poisoned over 100,000 people. Over 1000 people were hospitalized and nearly 100 people died. As a result of this, Milwaukee changed their water treatment facilities. People deserve safe, clean water both for drinking and for bathing. No one wants to wonder whether or not they are going to be poisoned by their water supply..
Water filtration should be the answer however studies have shown that many water filters out there only remove a small percentage of these harmful contaminants. We are promoting reverse osmosis technology because reverse osmosis has proved itself to be the ultimate and the most economical water purification method.