Know Your Environment. Protect Your Health.

Trichloroacetic acid

Oak Manor Water Association

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.

 

40

Samples

0

Samples exceeding legal limit (MCL)

19

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20181.50 ppb221.40 ppb - 1.60 ppb
20190.800 ppb64ND - 1.30 ppb
20200.675 ppb84ND - 1.70 ppb
20210.963 ppb85ND - 2.80 ppb
20220.670 ppb84ND - 1.40 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
2018-06-04181580012011.60 ppb
2018-06-04181580013011.40 ppb
2019-06-17191710015011.000 ppb
2019-06-17191710014011.30 ppb
2019-09-0919255000301ND
2019-09-0919255000401ND
2019-12-02193390020011.30 ppb
2019-12-02193390021011.20 ppb
2020-03-02200640017011.10 ppb
2020-03-02200640018011.30 ppb
2020-06-08201630016011.30 ppb
2020-06-08201630017011.70 ppb
2020-09-0820254003401ND
2020-09-0820254003201ND
2020-12-0720345002501ND
2020-12-0720345002601ND
2021-03-0821070008701ND
2021-03-08210700086011.10 ppb
2021-06-09211610020011.50 ppb
2021-06-09211610021011.20 ppb
2021-09-06212520036012.80 ppb
2021-09-0621252003701ND
2021-12-07213430019011.10 ppb
2021-12-0721343001801ND
2022-03-01O195922-HAA-11.34 ppb
2022-03-01O195923-HAA-11.40 ppb
2022-06-06O198858-HAA-11.38 ppb
2022-06-28O199114-HAA-1ND
2022-09-06O201439-HAA-1ND
2022-09-06O201438-HAA-11.24 ppb
2022-12-05O204262-HAA-1ND
2022-12-05O204261-HAA-1ND
2023-03-06O206919-HAA-1ND
2023-03-06O206920-HAA-1ND
2023-06-13O209997-HAA-1ND
2023-06-13O209998-HAA-1ND
2023-09-06O211820-HAA-1ND
2023-09-06O211821-HAA-1ND
2023-12-04O214333-HAA-1ND
2023-12-04O214332-HAA-1ND