Know Your Environment. Protect Your Health.

Chloroform

Concho Rural Water Grape Creek

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.

 

35

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND50ND
2019ND60ND
2020ND60ND
2021ND60ND
2022ND60ND
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
2018-02-21Q1807223003ND
2018-02-21Q1807223011ND
2018-02-21Q1807223016ND
2018-02-21Q1807223001ND
2018-05-10Q1819379003ND
2019-02-28Q1908591007ND
2019-02-28Q1908591015ND
2019-02-28Q1908591016ND
2019-02-28Q1908591019ND
2019-05-16Q1926514006ND
2019-05-16Q1926514007ND
2020-03-04Q2008293005ND
2020-03-04Q2008293007ND
2020-03-04Q2008293009ND
2020-03-18Q2012036003ND
2020-05-20Q2020107006ND
2020-05-20Q2020107007ND
2021-03-11Q2106518004ND
2021-03-11Q2106518010ND
2021-03-11Q2106518008ND
2021-03-11Q2106518006ND
2021-05-19Q2113108006ND
2021-05-19Q2113108007ND
2022-03-03Q2207458007ND
2022-03-03Q2207458009ND
2022-03-03Q2207458011ND
2022-03-03Q2207458013ND
2022-05-19Q2214827006ND
2022-05-19Q2214827007ND
2023-03-09Q2309465008ND
2023-03-09Q2309465010ND
2023-03-09Q2309465012ND
2023-03-09Q2309465014ND
2023-05-18Q2318791006ND
2023-05-18Q2318791007ND