Know Your Environment. Protect Your Health.

Dichloroacetic acid

Swansea, Town of

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)

26

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20189.36 ppb881.87 ppb - 18.0 ppb
20199.53 ppb87ND - 18.2 ppb
20202.76 ppb82ND - 15.7 ppb
20211.92 ppb83ND - 8.33 ppb
20223.90 ppb83ND - 12.7 ppb
20234.89 ppb83ND - 18.8 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
2018-01-302180202-259.24 ppb
2018-01-302180202-269.03 ppb
2018-05-012180502-2010.3 ppb
2018-05-012180502-2112.0 ppb
2018-08-022180803-025.00 ppb
2018-08-022180803-031.87 ppb
2018-10-292181101-439.50 ppb
2018-10-292181101-4218.0 ppb
2019-02-042190205-2314.5 ppb
2019-02-042190205-2218.2 ppb
2019-04-302190501-2217.5 ppb
2019-04-302190501-2314.3 ppb
2019-07-312190802-23ND
2019-07-312190802-223.60 ppb
2019-11-082191113-316.79 ppb
2019-11-082191113-301.38 ppb
2020-02-042200205-136.44 ppb
2020-02-042200205-12ND
2020-05-052200506-32ND
2020-05-052200506-3315.7 ppb
2020-08-032200804-13ND
2020-08-032200804-12ND
2020-11-052201106-03ND
2020-11-052201106-02ND
2021-02-022210203-13ND
2021-02-022210203-12ND
2021-05-172210518-121.16 ppb
2021-05-172210518-138.33 ppb
2021-08-042210805-12ND
2021-08-042210805-13ND
2021-11-022211103-22ND
2021-11-022211103-235.86 ppb
2022-02-012220202-12ND
2022-02-012220202-137.95 ppb
2022-05-052220506-2112.7 ppb
2022-05-052220506-12ND
2022-08-012220802-1310.6 ppb
2022-08-012220802-12ND
2022-11-012221102-29ND
2022-11-012221102-28ND
2023-02-022230203-12ND
2023-02-022230203-137.01 ppb
2023-05-022230503-2518.8 ppb
2023-05-022230503-24ND
2023-08-102230811-18ND
2023-08-102230811-19ND
2023-10-302231031-1313.3 ppb
2023-10-302231031-12ND