Utilities, Inc. of Louisiana Spillway Water Supply is currently in violation of the maximum contaminant level (MCL) for total trihalomethanes and haloacetic acids as set forth by the State [Part XII of the Louisiana State Sanitary Code (LAC 51:Xll)] 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 (DBPs). EPA and LDHH set standards for controlling the levels of disinfectants and DBPs in drinking water, including trihalomethanes (THMs) and haloacetic acid (HAAs). Some people who drink water containing THMs 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. Some people who drink water containing HAA5s in excess of the MCL over many years 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 HAA5 at 60 parts per billion (ppb) to reduce the risk of cancer or other adverse health effects. Compliance with the TTHMs and HAA5 standards for public water systems servicing less than 10,000 individuals initially became effective and enforceable on January 1, 2004. Compliance with the TTHMs standard is determine by calculating a locational running annual average (LRRA) of quarterly TTHMs sample results. Compliance calculations performed for the 1st quarter of 2021 show that the system’s current TTHMs LRAAs are 81 ppb at sample location DBP03 – 211 Spruce Drive. Thus, the system is currently in violation of TTHMs standards.
Construction of the storage tank has been completed and Utilities Inc of LA will continue to monitor and adjust storage tank capacity. UIL continues to work with an engineering firm and plans to begin construction of a spray atomizer unit which will assist with the reduction of TTHM concentrations. UIL has kept LDH informed of our progress.
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. If you have any questions, contact the UIL Compliance Administrator, Vicki Spence at 985-893-6646 – Opt. 2.
This is not an emergency. If it had been, you would have been notified immediately. EPA and LDH 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 HAA5 levels above the standard (e.g., 20 years of exposure) has the potential to have serious adverse effects on human health.