Know Your Environment. Protect Your Health.

Chloroform

Foxbane Combined Ws

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.

 

25

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND50ND
2019ND50ND
2020ND40ND
2021ND30ND
2022ND40ND
2023ND40ND

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
2018-06-19Q1824692011ND
2018-06-19Q1824692012ND
2018-06-19Q1824692022ND
2018-06-19Q1824692002ND
2018-12-13Q1851540002ND
2019-07-09Q1942896001ND
2019-07-09Q1942896003ND
2019-07-09Q1942896005ND
2019-07-09Q1942896007ND
2019-07-09Q1942896018ND
2020-09-29Q2038306001ND
2020-12-17Q2050032010ND
2020-12-17Q2050032012ND
2020-12-17Q2050032008ND
2021-08-04Q2120481005ND
2021-08-04Q2120481007ND
2021-09-01Q2123818001ND
2022-06-20Q2216892001ND
2022-10-26Q2232465006ND
2022-10-26Q2232465008ND
2022-10-26Q2232465012ND
2023-05-30Q2319950002ND
2023-05-30Q2319950003ND
2023-05-30Q2319950005ND
2023-05-30Q2319950007ND