Know Your Environment. Protect Your Health.

Trichloroacetic acid

Lake Delton Waterworks

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.

 

6

Samples

0

Samples exceeding legal limit (MCL)

4

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.220 ppb110.220 ppb
20190.310 ppb110.310 ppb
2020ND10ND
2021ND10ND
20220.280 ppb110.280 ppb
20230.330 ppb110.330 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
2018-07-1810683560.220 ppb
2019-07-2211359810.310 ppb
2020-07-081198280ND
2021-07-201266293ND
2022-07-1413236730.280 ppb
2023-07-17CB08070-010.330 ppb