Know Your Environment. Protect Your Health.

Chloroform

Othello Water Department

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.

 

26

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
2019ND40ND
2020N/A00N/A
2021ND60ND
2022ND90ND
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
2018-08-08ND
2018-08-08ND
2018-08-08ND
2018-12-13ND
2019-06-18ND
2019-07-08ND
2019-08-15ND
2019-08-15ND
2021-03-314102279ND
2021-08-104159204ND
2021-08-114169108ND
2021-08-114169236ND
2021-10-134202781ND
2021-10-134202782ND
2022-03-154263100ND
2022-06-024298828ND
2022-06-084298812ND
2022-06-084298813ND
2022-08-084335854ND
2022-08-084335140ND
2022-09-064364663ND
2022-09-064364651ND
2022-10-064364641ND
2023-04-174448578ND
2023-06-124499780ND
2023-08-144508758ND