Know Your Environment. Protect Your Health.

Chloroform

Two Way 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.

 

40

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND70ND
2019ND70ND
2020ND60ND
2021ND70ND
2022ND70ND
2023ND60ND

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
2018-06-25Q1825251008ND
2018-06-25Q1825251006ND
2018-06-25Q1825251024ND
2018-06-25Q1825251017ND
2018-06-25Q1825251011ND
2018-06-25Q1825251009ND
2018-06-25Q1825251014ND
2019-09-26Q1969734002ND
2019-10-14Q1972459011ND
2019-10-14Q1972459009ND
2019-10-14Q1972459007ND
2019-10-14Q1972459005ND
2019-10-14Q1972459003ND
2019-12-11Q1979771004ND
2020-08-25Q2034116003ND
2020-08-25Q2034116012ND
2020-10-12Q2039772007ND
2020-10-12Q2039772009ND
2020-10-12Q2039772011ND
2020-10-12Q2039772013ND
2021-09-02Q2123916002ND
2021-11-09Q2131341014ND
2021-11-09Q2131341016ND
2021-11-09Q2131341018ND
2021-11-09Q2131341020ND
2021-11-09Q2131341022ND
2021-11-09Q2131341012ND
2022-08-17Q2224357002ND
2022-10-11Q2230663008ND
2022-10-11Q2230663014ND
2022-10-11Q2230663012ND
2022-10-11Q2230663006ND
2022-10-11Q2230663004ND
2022-12-06Q2236335001ND
2023-07-24Q2329218001ND
2023-07-24Q2329218008ND
2023-10-31Q2346526005ND
2023-10-31Q2346526007ND
2023-10-31Q2346526009ND
2023-10-31Q2346526011ND