Know Your Environment. Protect Your Health.

Bromodichloromethane

Southeastern Connecticut Water Authority, Chesterfield Division

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

 

8

Samples

0

Samples exceeding legal limit (MCL)

7

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
20190.570 ppb220.520 ppb - 0.620 ppb
20200.640 ppb110.640 ppb
20210.770 ppb110.770 ppb
20220.700 ppb220.690 ppb - 0.710 ppb
20231.000 ppb111.000 ppb

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.06 ppb

The EWG Health Guideline of 0.06 ppb for bromodichloromethane 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
2018-07-17CA91804ND
2019-04-16CC956640.520 ppb
2019-07-16CD578560.620 ppb
2020-07-15CG341530.640 ppb
2021-07-20CI777640.770 ppb
2022-04-19CL117840.710 ppb
2022-07-19CL810250.690 ppb
2023-07-18CO531401.000 ppb