Know Your Environment. Protect Your Health.

Dichloroacetic acid

Golden State Water Company - Cowan Heights

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.

 

50

Samples

0

Samples exceeding legal limit (MCL)

44

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20182.01 ppb86ND - 3.80 ppb
20192.06 ppb107ND - 4.30 ppb
20201.79 ppb881.20 ppb - 2.60 ppb
20212.14 ppb87ND - 5.50 ppb
20224.64 ppb881.60 ppb - 8.10 ppb
20238.51 ppb881.10 ppb - 13.0 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
2018-01-09CA3010047_DST_801-201801091105ND
2018-01-09CA3010047_DST_802-2018010911503.80 ppb
2018-04-10CA3010047_DST_802-2018041007052.20 ppb
2018-04-10CA3010047_DST_801-201804100738ND
2018-07-10CA3010047_DST_801-2018071007302.90 ppb
2018-07-10CA3010047_DST_802-2018071006592.40 ppb
2018-10-09CA3010047_DST_801-2018100907201.50 ppb
2018-10-09CA3010047_DST_802-2018100906483.30 ppb
2019-01-08CA3010047_DST_801-201901080715ND
2019-01-08CA3010047_DST_802-2019010806492.10 ppb
2019-04-09CA3010047_DST_802-2019040907374.30 ppb
2019-04-09CA3010047_DST_802-2019040908204.20 ppb
2019-04-09CA3010047_DST_801-2019040906583.40 ppb
2019-04-09CA3010047_DST_801-2019040908571.60 ppb
2019-07-09CA3010047_DST_801-201907090715ND
2019-07-09CA3010047_DST_802-2019070906502.60 ppb
2019-10-08CA3010047_DST_802-2019100810152.40 ppb
2019-10-08CA3010047_DST_801-201910081010ND
2020-01-14CA3010047_DST_801-2020011409391.20 ppb
2020-01-14CA3010047_DST_802-2020011409051.20 ppb
2020-04-14CA3010047_DST_801-2020041408301.30 ppb
2020-04-14CA3010047_DST_802-2020041407551.40 ppb
2020-07-14CA3010047_DST_801-2020071408522.60 ppb
2020-07-14CA3010047_DST_802-2020071409222.60 ppb
2020-10-13CA3010047_DST_801-2020101313152.20 ppb
2020-10-13CA3010047_DST_802-2020101312471.80 ppb
2021-01-12CA3010047_DST_802-2021011208001.20 ppb
2021-01-12CA3010047_DST_801-202101120840ND
2021-04-13CA3010047_DST_802-2021041310362.00 ppb
2021-04-13CA3010047_DST_801-2021041311151.80 ppb
2021-07-13CA3010047_DST_802-2021071308302.80 ppb
2021-07-13CA3010047_DST_801-2021071308452.60 ppb
2021-10-12CA3010047_DST_802-2021101212155.50 ppb
2021-10-12CA3010047_DST_801-2021101211051.20 ppb
2022-01-11CA3010047_DST_802-2022011110303.80 ppb
2022-01-11CA3010047_DST_801-2022011111202.20 ppb
2022-04-12CA3010047_DST_801-2022041209561.60 ppb
2022-04-12CA3010047_DST_802-2022041209084.40 ppb
2022-07-12CA3010047_DST_802-2022071213053.70 ppb
2022-09-29CA3010047_DST_801-2022092911008.10 ppb
2022-10-11CA3010047_DST_801-2022101109056.50 ppb
2022-10-11CA3010047_DST_802-2022101108206.80 ppb
2023-01-11CA3010047_DST_802-2023011111503.80 ppb
2023-01-11CA3010047_DST_801-2023011111051.10 ppb
2023-04-11CA3010047_DST_801-2023041109458.90 ppb
2023-04-11CA3010047_DST_802-2023041110358.30 ppb
2023-07-11CA3010047_DST_802-20230711100013.0 ppb
2023-07-11CA3010047_DST_801-20230711103010.00 ppb
2023-10-10CA3010047_DST_801-20231010083511.0 ppb
2023-10-10CA3010047_DST_802-20231010080512.0 ppb