Know Your Environment. Protect Your Health.

Chloroform

City of Charlotte

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.

 

18

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

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

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
2018-05-04AE25365ND
2018-05-04AE25344ND
2018-06-11AE29260ND
2019-03-11AE57827ND
2019-03-11AE57855ND
2019-06-03AE68883ND
2020-05-08AF10365ND
2020-05-08AF10399ND
2020-05-08AF10407ND
2021-03-10AF46320ND
2021-05-17AF54095ND
2021-09-20AF70453ND
2022-09-08AG12127ND
2022-09-08AG12139ND
2022-09-08AG12143ND
2023-08-17AG53033ND
2023-08-17AG53042ND
2023-08-17AG53044ND