Know Your Environment. Protect Your Health.

Chloroform

San Jacinto Special Utility District

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.

 

27

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
2019ND70ND
2020ND40ND
2021ND40ND
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
2018-03-12AE17846ND
2018-03-12AE17880ND
2018-03-12AE17838ND
2018-07-06AE32613ND
2019-03-13AE58223ND
2019-03-13AE58225ND
2019-03-13AE58227ND
2019-06-06AE69452ND
2019-06-06AE69493ND
2019-08-01AE76824ND
2019-12-05AE91443ND
2020-01-22AE94690ND
2020-03-10AF01997ND
2020-03-10AF01991ND
2020-05-26AF12567ND
2021-01-11AF38521ND
2021-01-11AF38523ND
2021-03-08AF45724ND
2021-05-13AF53861ND
2022-01-24AF81297ND
2022-05-02AF95051ND
2022-05-02AF95080ND
2022-05-02AF95082ND
2023-03-14AG32973ND
2023-03-14AG32981ND
2023-06-08AG43734ND
2023-06-08AG43780ND