Know Your Environment. Protect Your Health.

Trichloroacetic acid

Williamson County Municipal Utility District 10

Trichloroacetic acid, one of the group of five haloacetic acids regulated by federal standards, is formed when chlorine or other disinfectants are used to treat drinking water. Haloacetic acids and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

 

48

Samples

0

Samples exceeding legal limit (MCL)

33

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20181.08 ppb85ND - 2.50 ppb
20193.95 ppb882.30 ppb - 5.40 ppb
20202.05 ppb881.40 ppb - 3.00 ppb
20212.30 ppb87ND - 5.90 ppb
20220.713 ppb85ND - 1.30 ppb
2023ND80ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.1 ppb

The EWG Health Guideline of 0.1 ppb for trichloroacetic acid was defined by the California Office of Environmental Health Hazard Assessment's public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer and harm to reproduction and child development.

ppb = parts per billion

All test results

Date Lab ID Result
2018-01-31AE11550ND
2018-01-31AE11547ND
2018-04-13AE22378ND
2018-04-13AE223771.000 ppb
2018-07-12AE331161.20 ppb
2018-07-12AE331181.60 ppb
2018-10-03AE424842.30 ppb
2018-10-03AE424852.50 ppb
2019-03-20AE592012.80 ppb
2019-03-20AE592023.10 ppb
2019-05-09AE656425.00 ppb
2019-05-09AE656435.10 ppb
2019-07-23AE755035.40 ppb
2019-07-23AE755015.10 ppb
2019-12-06AE915432.80 ppb
2019-12-06AE915452.30 ppb
2020-03-10AF019622.20 ppb
2020-03-10AF019672.10 ppb
2020-04-16AF069713.00 ppb
2020-04-16AF069732.80 ppb
2020-08-03AF215261.50 ppb
2020-08-03AF215311.70 ppb
2020-10-28AF323831.40 ppb
2020-10-28AF323881.70 ppb
2021-01-28AF415451.10 ppb
2021-01-28AF415471.10 ppb
2021-04-15AF50270ND
2021-04-15AF502751.20 ppb
2021-07-14AF618715.20 ppb
2021-07-14AF618745.90 ppb
2021-11-15AF765151.90 ppb
2021-11-15AF765162.00 ppb
2022-03-07AF876241.20 ppb
2022-03-07AF876301.30 ppb
2022-04-14AF933411.10 ppb
2022-04-14AF933431.10 ppb
2022-07-14AG04687ND
2022-07-14AG04691ND
2022-10-06AG162611.000 ppb
2022-10-06AG16264ND
2023-01-12AG24343ND
2023-01-12AG24348ND
2023-04-11AG36242ND
2023-04-11AG36243ND
2023-09-06AG55023ND
2023-09-06AG55029ND
2023-11-06AG62348ND
2023-11-06AG62364ND