Know Your Environment. Protect Your Health.

Chloroform

Bethany Special 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.

 

39

Samples

0

Samples exceeding legal limit (MCL)

13

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20182.87 ppb72ND - 14.1 ppb
2019ND70ND
20200.827 ppb72ND - 4.74 ppb
20216.47 ppb64ND - 29.1 ppb
20226.04 ppb63ND - 24.3 ppb
20233.39 ppb62ND - 13.6 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
2018-03-06Q1809125004ND
2018-03-06Q1809125001ND
2018-03-06Q1809125015ND
2018-03-06Q1809125005ND
2018-03-06Q1809125014ND
2018-05-15Q18196480015.99 ppb
2018-05-15Q181964800214.1 ppb
2019-02-07Q1905767006ND
2019-02-07Q1905767012ND
2019-02-07Q1905767015ND
2019-02-07Q1905767017ND
2019-08-12Q1953427001ND
2019-08-12Q1953427002ND
2019-12-10Q1979572001ND
2020-05-20Q20201000014.74 ppb
2020-05-20Q2020100002ND
2020-08-05Q20309020071.05 ppb
2020-08-05Q2030902009ND
2020-08-05Q2030902011ND
2020-10-14Q2040367005ND
2020-10-14Q2040367007ND
2021-06-24Q21165910064.61 ppb
2021-06-24Q211659100729.1 ppb
2021-06-24Q2116591012ND
2021-06-24Q21165910142.12 ppb
2021-06-24Q2116591016ND
2021-06-24Q21165910182.96 ppb
2022-05-16Q22144550021.31 ppb
2022-05-16Q221445500324.3 ppb
2022-10-19Q2231823001ND
2022-10-19Q223182300710.6 ppb
2022-10-19Q2231823005ND
2022-10-19Q2231823003ND
2023-09-07Q233856600213.6 ppb
2023-09-27Q2341622001ND
2023-11-06Q2347450007ND
2023-11-06Q2347450009ND
2023-11-06Q23474500116.73 ppb
2023-11-06Q2347450022ND