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Updated TTHM Results

Trihalomethane (TTHM) Notification

Haloacetic Acids (HAA5) Notification

December 12, 2018

Your Water is Safe to Drink, and You Do Not Need to Boil Your Water.

Members/Owners, TTHM results are in from October 10, 2018.  All the sample results are within normal range, but due to the running annual average (RAA) based on a sample taken March 31, 2018 we are sending out notifications.  

The following sample results are in milligrams per liter (mg/L):

                   TTHM                                                 HAA5                          

October 10, 2018 – .069 mg/L       October 10, 2018 – .046 mg/L

August 31, 2018 -    .059 mg/L       August 31, 2018  -  .022 mg/L

May 23, 2018 –        .063 mg/L       May 23, 2018  -     .021 mg/L

March 1, 2018 –      .151 mg/L        March 1, 2018  -  .172 mg/L        

342.8 divided by 4 = .086 mg/L       261 divided by 4 = .066 mg/L

The KWSC installed an aeration system in the water treatment plant clear-well in May 2017 to help eliminate TTHM’s. The system was not engineered correctly so broke down after a few months of use. The samples taken on March 1, 2018 was when the aeration system was not working. It has since been repaired and all samples since then have be good. This notice is not based on current sample results, it is simply based on the running annual average (RAA) including the bad sample taken March 1.

TCEQ Required wording for trihalomethanes:

The Texas Commission on Environmental Quality (TCEQ) has notified the KWSC (TX 1410028) 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 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 of 2018 of 0.086 mg/L for DBP2-04.

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 water.  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.

TCEQ Required wording for halacetic acids:

The Texas Commission on Environmental Quality (TCEQ) has notified KWSC (TX#1410028)

That the drinking water being supplied to customers had exceeded the Maximum Contaminant Level (MCL) for haloacetic acids (HAA5).  The U.S. Environmental Protection Agency (U.S. EPA) has established the MCL for haloacetic acids (HAA5) to be .060 mg/L based on locational running annual average (LRAA) and has determined that it is a health concern at levels above the MCL.  Analysis of the drinking water in your community for haloacetic acids (HAA5) indicates a compliance value, in quarter four of 2018 of .066 mg/L for DBP2-04.

Haloacetic acids 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 water.

Some people who drink water containing HAA5 in excess of the MCL over many years may have an increased risk of getting cancer.

KWSC took the following actions to address this issue:

KWSC is currently using a different engineering company for water treatment plant issues and continues to work closely with TCEQ and engineers to eliminate all future violations.

Again, please note: KWSC installed an aeration system in the water treatment plant clear-well in May 2017 to help eliminate TTHM’s. The system was not engineered correctly so broke down after a few months of use. The samples taken on March 1, 2018 was when the aeration system was not working. It has since been repaired and all samples since then have be good.

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.

If you have any questions, please feel free to contact our office at (512)932-3701 or (254)547-9430.

Delores Atkinson

Kempner Water Supply General Manager