Know Your Environment. Protect Your Health.

Dichloroacetic acid

City of Rule

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)

36

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20183.19 ppb85ND - 10.7 ppb
20191.61 ppb84ND - 4.20 ppb
20200.938 ppb84ND - 3.00 ppb
20213.43 ppb87ND - 5.60 ppb
20223.20 ppb881.70 ppb - 5.10 ppb
20232.96 ppb881.80 ppb - 3.60 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
2018-03-01Q18085950023.30 ppb
2018-03-01Q18085950013.40 ppb
2018-05-29Q1821223007ND
2018-05-29Q18212230021.80 ppb
2018-09-11Q1835796002ND
2018-09-11Q1835796003ND
2018-11-29Q184874100110.7 ppb
2018-11-29Q18487410026.30 ppb
2019-02-28Q19087480073.40 ppb
2019-02-28Q19087480084.20 ppb
2019-05-21Q19273040022.80 ppb
2019-05-21Q19273040032.50 ppb
2019-08-22Q1958555003ND
2019-08-22Q1958555002ND
2019-12-10Q1979532002ND
2019-12-10Q1979532003ND
2020-03-02Q20077400031.70 ppb
2020-03-02Q2007740004ND
2020-05-28Q20211730013.00 ppb
2020-05-28Q20211730031.80 ppb
2020-09-01Q2034855002ND
2020-09-01Q20348550031.000 ppb
2020-12-02Q2048097001ND
2020-12-02Q2048097002ND
2021-03-09Q2106058004ND
2021-03-09Q21060580052.40 ppb
2021-05-20Q21132340065.30 ppb
2021-05-20Q21132340074.40 ppb
2021-08-25Q21231930025.60 ppb
2021-08-25Q21231930033.10 ppb
2021-11-15Q21317440023.20 ppb
2021-11-15Q21317440033.40 ppb
2022-03-03Q22074780032.60 ppb
2022-03-03Q22074780043.40 ppb
2022-05-25Q22151950065.10 ppb
2022-05-25Q22151950073.50 ppb
2022-09-08Q22267900022.10 ppb
2022-09-08Q22267900031.70 ppb
2022-11-29Q22353920023.80 ppb
2022-11-29Q22353920033.40 ppb
2023-03-14Q23100480023.20 ppb
2023-03-14Q23100480032.90 ppb
2023-05-17Q23186160043.50 ppb
2023-05-17Q23186160053.60 ppb
2023-08-24Q23361890023.20 ppb
2023-08-24Q23361890033.20 ppb
2023-11-16Q23493710022.30 ppb
2023-11-16Q23493710031.80 ppb