Know Your Environment. Protect Your Health.

Dichloroacetic acid

Harris County Water Control and Improvement District 89

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.

 

48

Samples

0

Samples exceeding legal limit (MCL)

30

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201816.6 ppb887.60 ppb - 34.8 ppb
201916.3 ppb8810.2 ppb - 19.7 ppb
202018.0 ppb887.40 ppb - 23.2 ppb
20215.38 ppb86ND - 13.1 ppb
2022ND80ND
2023ND80ND

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
2018-01-29AE109667.80 ppb
2018-01-29AE109147.60 ppb
2018-04-11AE2223534.8 ppb
2018-04-11AE2222827.4 ppb
2018-08-06AE3580712.5 ppb
2018-08-06AE3580820.3 ppb
2018-11-15AE4621810.7 ppb
2018-11-15AE4623411.4 ppb
2019-02-19AE5482919.6 ppb
2019-02-19AE5483416.2 ppb
2019-04-19AE6312510.2 ppb
2019-04-19AE6313013.3 ppb
2019-08-13AE7827519.7 ppb
2019-08-13AE7825215.3 ppb
2019-10-16AE8690719.7 ppb
2019-10-16AE8691616.4 ppb
2020-01-22AE9462819.1 ppb
2020-01-22AE9464822.1 ppb
2020-04-22AF0762020.0 ppb
2020-04-22AF0762223.2 ppb
2020-07-29AF2110218.0 ppb
2020-07-29AF2110418.8 ppb
2020-10-22AF316437.40 ppb
2020-10-22AF3164415.7 ppb
2021-02-23AF439217.40 ppb
2021-02-23AF439231.40 ppb
2021-04-22AF510749.80 ppb
2021-04-22AF510776.20 ppb
2021-07-08AF611225.10 ppb
2021-07-08AF6112613.1 ppb
2021-11-29AF77344ND
2021-11-29AF77346ND
2022-01-31AF82503ND
2022-01-31AF82516ND
2022-04-25AF94190ND
2022-04-25AF94191ND
2022-07-26AG06346ND
2022-07-26AG06347ND
2022-12-12AG21443ND
2022-12-12AG21452ND
2023-03-07AG31855ND
2023-03-07AG31856ND
2023-04-27AG38410ND
2023-04-27AG38411ND
2023-07-17AG48709ND
2023-07-17AG48710ND
2023-11-06AG62359ND
2023-11-06AG62360ND