Know Your Environment. Protect Your Health.

Chloroform

City of Hale Center

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.

 

17

Samples

0

Samples exceeding legal limit (MCL)

1

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND30ND
2019ND30ND
2020ND30ND
20215.20 ppb31ND - 15.6 ppb
2022ND30ND
2023ND20ND

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
2018-05-03Q1817997003ND
2018-05-03Q1817997010ND
2018-05-03Q1817997001ND
2019-06-26Q1940104003ND
2019-06-26Q1940104005ND
2019-06-26Q1940104011ND
2020-07-23Q2028981011ND
2020-07-23Q2028981009ND
2020-07-23Q2028981008ND
2021-07-20Q211892900215.6 ppb
2021-07-20Q2118929004ND
2021-07-20Q2118929007ND
2022-05-05Q2213651001ND
2022-05-05Q2213651009ND
2022-05-05Q2213651010ND
2023-06-08Q2321643002ND
2023-06-08Q2321643010ND