MAY 21,2012 Re: Safe Drinking Water Act-Notice
MAY 21,2012 Re: Safe Drinking Water Act-Notice of Violation/ Public Notification of Non- Compliance Disinfection By-Product (TTHMs) MCL Violation Community Water System Weston Water System PWSID#LA1049019 Jackson Parish
The Weston Water System is currently in violation of the maximum contaminant level (MCL) for total trihalomethanes (TTHMs) as set forth by the State (Part XII of the Louisiana State Sanitary Code) and the Federal Primary Drinking Water Regulations (40 CFR Part 141). The United States Environmental Protection Agency (EPA) and the Louisiana Department of Health and Hospitals (LDHH) set drinking water standards and requires the disinfection of drinking water. Where disinfection is used in the treatment of drinking water, disinfectants combine with naturally occurring organic and inorganic matter present in water to form chemicals called disinfection byproducts (DBFs). EPA and LDHH set standards for controlling the levels of disinfectants and DBFs in drinking water, including total trihalomethanes (TTHMs) and haloacetic acids-five (HAAS). Some people who drink water containing TTHMs in excess of the MCL over many years may experience problems with their liver, kidneys, or central nervous system, and may have an increased risk of getting cancer. In December 1998, EPA set enforceable drinking water standards for TTHMs at 80 parts per billion (ppb) and for HAAS at 60 parts per billion (ppb) to reduce the risk of cancer or other adverse health effects. Compliance with the TTHMs/HAA5 standards for public water systems serving less than 10,000 individuals initially became effective and enforceable on January 1, 2004. Compliance with the TTHMs/HAAS standards is determined by calculating an annual average (AA) of quarterly TTHMs/HAAS sample results. Compliance calculations performed for the second calendar quarter of 2012 show that the system's current TTHMs AA is 90 ppb; thus, the system is currently in violation of the TTHMs standard. Please share this information with all the other people who drink this water, especially those who may not have received this notice directly (for example, people in apartments, nursing homes, schools, and businesses). You can do this by posting this notice in a public place or distributing copies by hand or mail. This is NOT an emergency. If it had been, you would have been notified immediately. EPA and LDHH do not consider this violation to have any serious adverse health effects on human health as a result of short-term exposure; however, continued long term exposure to TTHMs and HAAS levels above the standard (e.g., 20 years of exposure) has the potential to have serious adverse effects on human health. Steps to comply with Federal and State requirements are being implemented by the installation of automatic flush valves on the system. Contact John Culpepper, system manager for any further questions. Ph. 318-395-8476.
1td: June 4, 2012