Know Your Environment. Protect Your Health.

Dichloroacetic acid

St Tam Parish - Briarwood Terrace

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.

 

16

Samples

0

Samples exceeding legal limit (MCL)

13

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20181.35 ppb42ND - 2.70 ppb
20191.88 ppb440.850 ppb - 2.90 ppb
20200.665 ppb220.660 ppb - 0.670 ppb
20210.355 ppb21ND - 0.710 ppb
20221.02 ppb220.440 ppb - 1.60 ppb
20231.04 ppb220.980 ppb - 1.10 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
2018-02-1635374865001ND
2018-02-1635374865001ND
2018-11-05354288020012.70 ppb
2018-11-05354288020012.70 ppb
2019-02-21354500300012.90 ppb
2019-02-21354500300012.90 ppb
2019-11-01355091370010.850 ppb
2019-11-01355091370010.850 ppb
2020-02-14355314580010.670 ppb
2020-11-06355905120010.660 ppb
2021-02-05356100120010.710 ppb
2021-11-0535676318001ND
2022-02-11356965830011.60 ppb
2022-11-04357581790010.440 ppb
2023-02-03357769910010.980 ppb
2023-11-03358392840011.10 ppb