Know Your Environment. Protect Your Health.

Chloroform

Evans Mills Village

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.

 

39

Samples

0

Samples exceeding legal limit (MCL)

3

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019ND80ND
20200.0875 ppb81ND - 0.700 ppb
20210.183 ppb62ND - 0.600 ppb
2022ND80ND
2023ND80ND

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
2018-10-04181005027-002ND
2019-02-20190222031-002ND
2019-02-20190222031-001ND
2019-05-14190517026-001ND
2019-05-14190517026-002ND
2019-08-07190809061-001ND
2019-08-07190809061-002ND
2019-12-02191209031-001ND
2019-12-02191209031-002ND
2020-02-24200227028-001ND
2020-02-24200227028-002ND
2020-06-03200609037ND
2020-06-03200609037-001ND
2020-08-27200828029-0020.700 ppb
2020-08-27200828029-001ND
2020-12-01201203035-001ND
2020-12-01201203025-002ND
2021-02-24210226058-001ND
2021-02-25210226058-002ND
2021-05-05210511063-002ND
2021-05-05210511063-001ND
2021-11-30211202024-0010.600 ppb
2021-11-30211202024-0020.500 ppb
2022-02-24220225020-002ND
2022-02-24220225020-001ND
2022-05-31220606029-001ND
2022-05-31220606029-002ND
2022-08-10220812058-001ND
2022-08-10220812058-002ND
2022-11-28221202017-001ND
2022-11-28221202017-002ND
2023-02-21230223027-002ND
2023-02-21230223027-001ND
2023-05-23230531021-002ND
2023-05-23230531021-001ND
2023-08-18L2349280-01ND
2023-08-18L2349280ND
2023-11-20L2369298-02ND
2023-11-20L2369298-04ND