Know Your Environment. Protect Your Health.

Chloroform

City of Moses Lake

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.

 

53

Samples

0

Samples exceeding legal limit (MCL)

2

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND70ND
2019ND90ND
2020N/A00N/A
2021ND80ND
20220.0390 ppb211ND - 0.820 ppb
20230.146 ppb81ND - 1.17 ppb

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
2018-01-31ND
2018-04-03ND
2018-06-28ND
2018-07-09ND
2018-07-09ND
2018-09-11ND
2018-11-06ND
2019-03-26ND
2019-07-09ND
2019-07-29ND
2019-07-30ND
2019-07-30ND
2019-10-01ND
2019-11-12ND
2019-11-12ND
2019-12-03ND
2021-01-114063010ND
2021-06-144130306ND
2021-07-274149446ND
2021-08-234173066ND
2021-08-234173065ND
2021-09-014178894ND
2021-10-064188764ND
2021-11-084203458ND
2022-03-104258470ND
2022-03-104258471ND
2022-03-104258475ND
2022-03-154258473ND
2022-03-224263834ND
2022-03-224266305ND
2022-03-224266301ND
2022-03-224266308ND
2022-03-224266307ND
2022-03-224266302ND
2022-03-224266303ND
2022-03-224266306ND
2022-03-224266304ND
2022-04-184274610ND
2022-06-064298852ND
2022-06-134298844ND
2022-07-114328254ND
2022-07-1143282530.820 ppb
2022-09-124338140ND
2022-09-124338139ND
2022-10-064356370ND
2023-06-214481116ND
2023-06-214480385ND
2023-06-214480387ND
2023-06-214480386ND
2023-07-2644988501.17 ppb
2023-08-224500467ND
2023-09-134512968ND
2023-09-134512967ND