Know Your Environment. Protect Your Health.

Dibromochloromethane

Ridgefield Public Works

Dibromochloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Dibromochloromethane and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

 

15

Samples

0

Samples exceeding legal limit (MCL)

3

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019ND20ND
2020N/A00N/A
20211.000 ppb41ND - 4.00 ppb
20220.500 ppb41ND - 2.00 ppb
20230.190 ppb31ND - 0.570 ppb

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.1 ppb

The EWG Health Guideline of 0.1 ppb for dibromochloromethane 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
2018-08-08ND
2018-08-08ND
2019-08-07ND
2019-08-07ND
2021-08-184194305ND
2021-08-184194289ND
2021-08-1841942874.00 ppb
2021-11-174213224ND
2022-01-264241732ND
2022-08-174364073ND
2022-08-174359364ND
2022-08-1743593632.00 ppb
2023-08-234514705ND
2023-08-2345132920.570 ppb
2023-08-234513289ND