Know Your Environment. Protect Your Health.

Trichloroacetic acid

Santo Special Utility District

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
20180.150 ppb81ND - 1.20 ppb
20190.713 ppb85ND - 1.40 ppb
20202.51 ppb881.40 ppb - 4.00 ppb
20212.14 ppb881.10 ppb - 3.40 ppb
20221.73 ppb86ND - 3.50 ppb
20231.39 ppb85ND - 2.80 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
2018-02-28Q1808325003ND
2018-02-28Q1808325001ND
2018-05-31Q1821637002ND
2018-05-31Q1821637001ND
2018-08-22Q1833776001ND
2018-08-22Q1833776002ND
2018-11-14Q1846096001ND
2018-11-14Q18460960021.20 ppb
2019-02-27Q1908294001ND
2019-02-27Q1908294002ND
2019-05-29Q19296190021.40 ppb
2019-05-29Q19296190031.20 ppb
2019-09-18Q19663320021.000 ppb
2019-09-18Q19663320011.000 ppb
2019-12-03Q1978570001ND
2019-12-03Q19785700021.10 ppb
2020-02-26Q20072770011.60 ppb
2020-02-26Q20072770021.40 ppb
2020-06-03Q20219810022.80 ppb
2020-06-03Q20219810033.30 ppb
2020-08-26Q20342160013.00 ppb
2020-08-26Q20342160024.00 ppb
2020-11-17Q20453870012.00 ppb
2020-11-17Q20453870022.00 ppb
2021-03-03Q21056400011.40 ppb
2021-03-03Q21056400021.10 ppb
2021-05-26Q21136990012.90 ppb
2021-05-26Q21136990023.40 ppb
2021-09-16Q21253930012.30 ppb
2021-09-16Q21253930022.50 ppb
2021-12-01Q21334950012.00 ppb
2021-12-01Q21334950021.50 ppb
2022-03-28Q2209657001ND
2022-03-28Q2209657002ND
2022-06-15Q22166820013.50 ppb
2022-06-15Q22166820022.60 ppb
2022-09-08Q22268160011.70 ppb
2022-09-08Q22268160021.90 ppb
2022-11-02Q22332640022.00 ppb
2022-11-02Q22332640032.10 ppb
2023-01-23Q23030300012.30 ppb
2023-01-23Q23030300022.20 ppb
2023-05-04Q23173350012.80 ppb
2023-05-04Q23173350022.70 ppb
2023-08-23Q2335765001ND
2023-08-23Q2335765002ND
2023-12-05Q23516290021.10 ppb
2023-12-05Q2351629003ND