Know Your Environment. Protect Your Health.

Trichloroacetic acid

Clayton Water Supply Corporation Plant 2

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)

27

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20182.79 ppb86ND - 8.60 ppb
20191.29 ppb86ND - 3.30 ppb
20201.41 ppb84ND - 3.00 ppb
2021ND80ND
20222.81 ppb84ND - 11.2 ppb
20236.06 ppb87ND - 18.0 ppb

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
2018-03-01Q18084990021.50 ppb
2018-03-01Q18084990011.50 ppb
2018-05-24Q18209420027.40 ppb
2018-05-24Q18209420018.60 ppb
2018-08-23Q1833945001ND
2018-08-23Q1833945002ND
2018-12-14Q18517830011.70 ppb
2018-12-14Q18517830021.60 ppb
2019-02-05Q1905213001ND
2019-02-05Q1905213002ND
2019-04-30Q19172510011.10 ppb
2019-04-30Q19172510021.000 ppb
2019-08-26Q19592700021.70 ppb
2019-08-26Q19592700011.90 ppb
2019-12-17Q19803320041.30 ppb
2019-12-17Q19803320053.30 ppb
2020-03-05Q20083450012.60 ppb
2020-03-05Q20083450022.80 ppb
2020-05-27Q20208380012.90 ppb
2020-05-27Q20208380023.00 ppb
2020-09-22Q2037532001ND
2020-09-22Q2037532002ND
2020-12-03Q2048557003ND
2020-12-03Q2048557004ND
2021-02-24Q2104969001ND
2021-02-24Q2104969002ND
2021-04-29Q2110984001ND
2021-04-29Q2110984002ND
2021-09-28Q2126522007ND
2021-09-28Q2126522008ND
2021-12-02Q2133318001ND
2021-12-02Q2133318002ND
2022-02-01Q2203640001ND
2022-02-01Q2203640002ND
2022-04-12Q2211213001ND
2022-04-12Q22112130023.20 ppb
2022-09-13Q22271210016.70 ppb
2022-09-13Q222712100211.2 ppb
2022-11-03Q2233352005ND
2022-11-03Q22333520061.40 ppb
2023-02-16Q230653800118.0 ppb
2023-02-16Q230653800215.1 ppb
2023-05-03Q23168030012.90 ppb
2023-05-03Q23168030023.60 ppb
2023-07-27Q2330271001ND
2023-07-27Q23302710061.10 ppb
2023-10-17Q23442530013.80 ppb
2023-10-17Q23442530024.00 ppb