Know Your Environment. Protect Your Health.

Trichloroacetic acid

Somerville Place

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.

 

24

Samples

0

Samples exceeding legal limit (MCL)

3

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
20191.10 ppb111.10 ppb
2020ND20ND
20210.325 ppb41ND - 1.30 ppb
20220.125 ppb81ND - 1.000 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
2018-06-04AE28444ND
2019-07-29AE761291.10 ppb
2020-08-19AF24284ND
2020-08-19AF24285ND
2021-08-23AF673451.30 ppb
2021-08-23AF67355ND
2021-10-26AF74678ND
2021-10-26AF74682ND
2022-03-03AF87477ND
2022-03-03AF874821.000 ppb
2022-05-04AF95513ND
2022-05-04AF95514ND
2022-08-10AG08502ND
2022-08-10AG08504ND
2022-10-18AG17359ND
2022-10-18AG17361ND
2023-03-13AG32566ND
2023-03-13AG32567ND
2023-06-06AG43215ND
2023-06-06AG43230ND
2023-07-18AG49007ND
2023-07-18AG49010ND
2023-10-09AG58845ND
2023-10-09AG58851ND