Know Your Environment. Protect Your Health.

Trichloroacetic acid

Gig Harbor Water Department

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.

 

20

Samples

0

Samples exceeding legal limit (MCL)

2

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
2019ND40ND
2020N/A00N/A
2021ND40ND
2022ND40ND
20230.560 ppb42ND - 1.22 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
2018-08-08ND
2018-08-08ND
2018-08-08ND
2018-08-08ND
2019-08-08ND
2019-08-08ND
2019-08-08ND
2019-08-08ND
2021-08-034159282ND
2021-08-034159280ND
2021-08-034159279ND
2021-08-034159281ND
2022-08-094338615ND
2022-08-094338617ND
2022-08-094338614ND
2022-08-094338616ND
2023-08-0745071401.22 ppb
2023-08-074507139ND
2023-08-074507142ND
2023-08-0745071411.02 ppb