Know Your Environment. Protect Your Health.

Chloroform

Skyline Terrace Subdivision

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.

 

15

Samples

0

Samples exceeding legal limit (MCL)

4

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
20190.667 ppb31ND - 2.00 ppb
20200.700 ppb21ND - 1.40 ppb
20211.13 ppb32ND - 2.40 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
2018-02-14AE13764ND
2018-02-14AE13780ND
2019-06-04AE69058ND
2019-06-26AE72285ND
2019-06-26AE722892.00 ppb
2020-05-06AF095071.40 ppb
2020-05-06AF09509ND
2021-04-28AF51524ND
2021-06-15AF580902.40 ppb
2021-11-03AF755951.000 ppb
2022-03-16AF89395ND
2022-03-28AF90722ND
2022-07-25AG05986ND
2023-01-12AG24396ND
2023-01-12AG24398ND