Know Your Environment. Protect Your Health.

Dichloroacetic acid

City of Chico

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.

 

20

Samples

0

Samples exceeding legal limit (MCL)

2

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
2019ND40ND
2020ND40ND
2021ND40ND
20220.550 ppb21ND - 1.10 ppb
20230.600 ppb21ND - 1.20 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
2018-02-28Q1808235001ND
2018-06-07Q1822702001ND
2018-09-26Q1838500001ND
2018-12-13Q1851676023ND
2019-01-08Q1900653007ND
2019-04-09Q1914098001ND
2019-08-13Q1954152001ND
2019-11-21Q1977808001ND
2020-03-02Q2007727006ND
2020-06-01Q2021442003ND
2020-08-19Q2033209013ND
2020-12-16Q2049866001ND
2021-03-10Q2106372001ND
2021-05-12Q2112418001ND
2021-08-11Q2121372022ND
2021-12-14Q2135210001ND
2022-09-08Q2226813010ND
2022-09-08Q22268130111.10 ppb
2023-05-30Q2319948001ND
2023-05-30Q23199480021.20 ppb