Know Your Environment. Protect Your Health.

Dichloroacetic acid

Tri Community Water Supply Corporation

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.

 

24

Samples

0

Samples exceeding legal limit (MCL)

9

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.575 ppb42ND - 1.30 ppb
20190.525 ppb42ND - 1.10 ppb
20200.425 ppb41ND - 1.70 ppb
20210.250 ppb41ND - 1.000 ppb
2022ND40ND
20231.10 ppb43ND - 1.80 ppb

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
2018-02-08AE12983ND
2018-04-17AE227401.30 ppb
2018-08-23AE38246ND
2018-10-31AE450311.000 ppb
2019-02-27AE56198ND
2019-05-29AE683471.10 ppb
2019-08-19AE792101.000 ppb
2019-10-29AE87831ND
2020-02-26AE99976ND
2020-04-16AF069581.70 ppb
2020-08-17AF23680ND
2020-10-15AF30824ND
2021-01-20AF40041ND
2021-04-14AF50104ND
2021-08-18AF66745ND
2021-10-14AF735301.000 ppb
2022-01-11AF79634ND
2022-05-03AF95312ND
2022-07-19AG05256ND
2022-10-24AG18019ND
2023-01-12AG24340ND
2023-05-01AG385831.10 ppb
2023-08-08AG517791.50 ppb
2023-10-19AG603991.80 ppb