Know Your Environment. Protect Your Health.

Chloroform

Bryants Creek Subdivision

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.

 

28

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
2019N/A00N/A
2020ND40ND
2021N/A00N/A
2022N/A00N/A
2023ND240ND

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
2020-02-02AD60441ND
2020-02-02AD60439ND
2020-02-02AD60438ND
2020-02-02AD60440ND
2023-01-312223851ND
2023-01-312223848ND
2023-01-312223849ND
2023-01-312223850ND
2023-02-222301503ND
2023-02-222301502ND
2023-02-222301504ND
2023-02-222301501ND
2023-06-052303971ND
2023-06-052303974ND
2023-06-052303972ND
2023-06-142310835ND
2023-06-202310891ND
2023-06-202310890ND
2023-06-202310888ND
2023-06-202310889ND
2023-09-192312324ND
2023-09-192312323ND
2023-09-202312326ND
2023-09-202312325ND
2023-11-082317366ND
2023-11-082317368ND
2023-11-082317367ND
2023-11-082317365ND