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Mandatory Language for a Maximum Contaminant Level Violation
MCL, LRAA / TTHM
The Texas Commission on Environmental Quality (TCEQ) has notified the Westwood Shores MUD
TX2280016 that the drinking water being supplied to customers had exceeded the Maximum
Contaminant Level (MCL) for total trihalomethanes. The U.S. Environmental Protection Agency (U.S. EPA)
has established the MCL for total trihalomethanes to be 0.080 milligrams per liter (mg/L) based on a
locational running annual average (LRAA) and has determined that it is a health concern at levels above
the MCL. Analysis of drinking water in your community for total trihalomethanes indicates a compliance
value in quarter four 2022 of 0.095 mg/L for DBP2-02 and 0.106 mg/L for DBP2-01 as well as quarter one
2023 of 0.102 mg/L for DBP2-01 and 0.100 mg/L for DBP2-02.
Trihalomethanes are a group of volatile organic compounds that are formed when chlorine, added to the
water during the treatment process for disinfection, reacts with naturally-occurring organic matter in the
Some people who drink water containing trihalomethanes in excess of the MCL over many years may
experience problems with their liver, kidney, or central nervous systems, and may have an increased risk
of getting cancer.
You do not need to use an alternative water supply. However, if you have health concerns, you may want
to talk to your doctor to get more information about how this may affect you.
We are taking the following actions to address this issue:
We are closely monitoring the TTHM levels throughout the system and will increase flushing to help
mitigate any elevated results.
Please share this information with all people who drink this water, especially those who may not have
received this notice directly (i.e., 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 questions regarding this matter, you may contact Liza Prudhomme-Mireles at 713-443-9740.
Posted /Delivered on: 3/23/2023