Know Your Environment. Protect Your Health.

Bromodichloromethane

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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.

 

12

Samples

0

Samples exceeding legal limit (MCL)

5

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND30ND
20190.600 ppb110.600 ppb
20200.267 ppb31ND - 0.800 ppb
20211.70 ppb111.70 ppb
202220.3 ppb1120.3 ppb
20230.200 ppb31ND - 0.600 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 Result
2018-08-21ND
2018-08-21ND
2018-08-21ND
2019-09-090.600 ppb
2020-08-24ND
2020-08-24ND
2020-08-270.800 ppb
2021-08-171.70 ppb
2022-08-0120.3 ppb
2023-08-140.600 ppb
2023-08-14ND
2023-08-14ND