Know Your Environment. Protect Your Health.

Chloroform

The Coves Water Supply Corporation

Chloroform, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Chloroform and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Read More.

In addition to tap water disinfection, chloroform pollution in the environment also comes from industrial discharges from pulp and paper mills, and from urban wastewater effluent. Human studies show that chloroform damages the kidneys, liver and central nervous system. In animals, chloroform causes infertility, birth defects and cancer.

Click here to read more about disinfection byproducts.

 

16

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
2019ND20ND
2020ND20ND
2021ND20ND
2022ND30ND
2023ND30ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.4 ppb

The EWG Health Guideline of 0.4 ppb for chloroform was based on 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 fetal growth and development.

ppb = parts per billion

All test results

Date Lab ID Result
2018-01-30AE11215ND
2018-05-16AE26539ND
2018-05-16AE26576ND
2018-07-16AE33314ND
2019-07-09AE73629ND
2019-07-09AE73689ND
2020-06-03AF13728ND
2020-06-03AF13732ND
2021-06-16AF58241ND
2021-06-16AF58259ND
2022-09-12AG12365ND
2022-09-12AG12367ND
2022-09-12AG12477ND
2023-08-01AG50777ND
2023-08-01AG50779ND
2023-08-01AG50816ND