Know Your Environment. Protect Your Health.

Chloroform

Bois D Arc Municipal Utility District

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)

11

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.420 ppb41ND - 1.68 ppb
20190.265 ppb41ND - 1.06 ppb
20200.323 ppb41ND - 1.29 ppb
20210.349 ppb123ND - 1.67 ppb
20220.215 ppb61ND - 1.29 ppb
20231.04 ppb54ND - 1.74 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
2018-09-19Q18378160021.68 ppb
2018-09-19Q1837816001ND
2018-11-05Q1844067003ND
2018-11-05Q1844067005ND
2019-09-04Q1962033001ND
2019-09-04Q1962033003ND
2019-09-04Q19620330121.06 ppb
2019-09-04Q1962033013ND
2020-09-02Q20351710011.29 ppb
2020-09-02Q2035171002ND
2020-10-28Q2041654010ND
2020-10-28Q2041654012ND
2021-01-26Q2101873003ND
2021-06-23Q2116468013ND
2021-06-23Q21164680121.67 ppb
2021-06-23Q2116468008ND
2021-06-23Q21164680101.14 ppb
2021-06-30Q2117217001ND
2021-09-28Q2126459001ND
2021-09-28Q2126459003ND
2021-09-28Q21264590051.38 ppb
2021-11-29Q2133550003ND
2021-11-29Q2133550008ND
2021-11-29Q2133550010ND
2022-07-05Q2218601003ND
2022-07-05Q2218601015ND
2022-07-05Q22186010141.29 ppb
2022-07-05Q2218601005ND
2022-07-05Q2218601001ND
2022-11-22Q2235115001ND
2023-02-09Q2305165002ND
2023-06-27Q23246550031.74 ppb
2023-06-27Q23246550041.22 ppb
2023-06-27Q23246550051.02 ppb
2023-06-27Q23246550071.24 ppb