Know Your Environment. Protect Your Health.

Dichloroacetic acid

Tri-water System

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.

 

64

Samples

0

Samples exceeding legal limit (MCL)

18

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.141 ppb164ND - 0.630 ppb
20190.106 ppb164ND - 0.480 ppb
20200.354 ppb84ND - 0.770 ppb
20210.0888 ppb81ND - 0.710 ppb
20220.556 ppb85ND - 1.80 ppb
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
2018-02-2635376601001ND
2018-02-2635376601002ND
2018-02-2635376601002ND
2018-02-2635376601001ND
2018-05-29353952080020.630 ppb
2018-05-29353952080010.500 ppb
2018-05-29353952080020.630 ppb
2018-05-29353952080010.500 ppb
2018-08-1635412064001ND
2018-08-1635412064002ND
2018-08-1635412064001ND
2018-08-1635412064002ND
2018-11-1935432392001ND
2018-11-1935432392001ND
2018-11-1935432392002ND
2018-11-1935432392002ND
2019-02-25354509600010.370 ppb
2019-02-25354509600020.480 ppb
2019-02-25354509600010.370 ppb
2019-02-25354509600020.480 ppb
2019-05-2035470221001ND
2019-05-2035470221002ND
2019-05-2035470221001ND
2019-05-2035470221002ND
2019-08-1935492405002ND
2019-08-1935492405001ND
2019-08-1935492405001ND
2019-08-1935492405002ND
2019-11-1935514077001ND
2019-11-1935514077002ND
2019-11-1935514077002ND
2019-11-1935514077001ND
2020-02-18355324540020.720 ppb
2020-02-18355324540010.770 ppb
2020-05-20355519650010.640 ppb
2020-05-20355519650020.700 ppb
2020-08-1735572267001ND
2020-08-1735572267002ND
2020-11-0935591922001ND
2020-11-0935591922002ND
2021-03-1235618937001ND
2021-03-1235618937002ND
2021-05-1735634980001ND
2021-05-1735634980002ND
2021-08-1235655890001ND
2021-08-1235655890002ND
2021-11-2935680543001ND
2021-11-29356805430020.710 ppb
2022-02-14356982740020.640 ppb
2022-02-1435698274001ND
2022-05-02357159680021.80 ppb
2022-05-02357159680010.600 ppb
2022-08-08357395230010.680 ppb
2022-08-08357395230020.730 ppb
2022-11-0735758867001ND
2022-11-0735758867002ND
2023-02-1435780695001ND
2023-02-1435780695002ND
2023-05-0135797755001ND
2023-05-0135797755002ND
2023-08-1435821940001ND
2023-08-1435821940002ND
2023-11-0635840861001ND
2023-11-0635840861002ND