Know Your Environment. Protect Your Health.

Chloroform

Chisholm Hills Estates

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
2018-09-18Q1837077003ND
2018-09-18Q1837077019ND
2018-09-18Q1837077001ND
2019-05-21Q1927166003ND
2019-05-21Q1927166005ND
2019-09-04Q1961939001ND
2020-09-29Q2038308001ND
2020-11-18Q2045746001ND
2020-11-18Q2045746003ND
2021-06-29Q2116975008ND
2021-06-29Q2116975011ND
2021-06-29Q2116975009ND
2022-09-22Q2228577001ND
2022-11-15Q2234333005ND
2022-11-15Q2234333007ND
2023-07-20Q2328725003ND
2023-09-06Q2338462001ND
2023-09-06Q2338462004ND