Know Your Environment. Protect Your Health.

Chloroform

Eol 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
2018ND30ND
2019ND10ND
2020ND30ND
2021ND30ND
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
2018-03-07AE17561ND
2018-03-07AE17569ND
2018-06-06AE28819ND
2019-07-22AE75222ND
2020-07-14AF19219ND
2020-07-14AF19239ND
2020-07-14AF19241ND
2021-06-02AF56192ND
2021-06-02AF56263ND
2021-06-02AF56269ND
2022-01-25AF81642ND
2022-01-25AF81644ND
2022-07-06AG03329ND
2023-06-05AG42989ND
2023-06-05AG43016ND
2023-08-21AG53180ND