Know Your Environment. Protect Your Health.

Trichloroacetic acid

City of Joaquin

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.

 

32

Samples

0

Samples exceeding legal limit (MCL)

25

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201822.7 ppb441.90 ppb - 46.0 ppb
20191.40 ppb86ND - 2.10 ppb
20202.15 ppb86ND - 4.50 ppb
20213.50 ppb42ND - 12.3 ppb
20225.65 ppb441.000 ppb - 9.10 ppb
20239.60 ppb43ND - 21.8 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
2018-09-27Q18387000111.90 ppb
2018-09-27Q18387000104.40 ppb
2018-12-11Q185067300146.0 ppb
2018-12-11Q185067300238.3 ppb
2019-03-14Q1910906001ND
2019-03-14Q19109060021.40 ppb
2019-05-15Q19256740041.70 ppb
2019-05-15Q19256740052.00 ppb
2019-09-30Q19699410012.10 ppb
2019-09-30Q19699410022.10 ppb
2019-12-05Q19791520011.90 ppb
2019-12-05Q1979152002ND
2020-03-05Q20083470042.10 ppb
2020-03-05Q2008347005ND
2020-05-13Q20189350011.60 ppb
2020-05-13Q20189350024.50 ppb
2020-09-01Q2035105001ND
2020-09-01Q20351050021.000 ppb
2020-11-04Q20430730014.00 ppb
2020-11-04Q20430730024.00 ppb
2021-01-26Q2101842010ND
2021-04-13Q210940100112.3 ppb
2021-08-04Q21204420011.70 ppb
2021-10-18Q2129052001ND
2022-03-14Q22084630059.10 ppb
2022-05-23Q22149600018.10 ppb
2022-08-11Q22233360014.40 ppb
2022-11-14Q22340280011.000 ppb
2023-02-15Q230630100421.8 ppb
2023-04-25Q231553600114.4 ppb
2023-07-05Q2326036001ND
2023-10-02Q23421000012.20 ppb