Know Your Environment. Protect Your Health.

Dichloroacetic acid

Tom Green County Fresh Water Supply District 3

Dichloroacetic 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.

 

11

Samples

0

Samples exceeding legal limit (MCL)

2

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND30ND
2019ND10ND
2020ND10ND
2021ND20ND
20221.000 ppb221.000 ppb
2023ND20ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.2 ppb

The EWG Health Guideline of 0.2 ppb for dichloroacetic 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
2018-02-21Q1807226002ND
2018-05-10Q1819381010ND
2018-08-09Q1832053001ND
2019-05-16Q1926516001ND
2020-05-20Q2020109002ND
2021-05-19Q2113110017ND
2021-05-19Q2113110018ND
2022-05-19Q22148290091.000 ppb
2022-05-19Q22148290101.000 ppb
2023-05-18Q2318793005ND
2023-05-18Q2318793006ND