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.

 

8

Samples

0

Samples exceeding legal limit (MCL)

3

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
20190.295 ppb21ND - 0.590 ppb
20200.600 ppb110.600 ppb
2021ND10ND
2022ND20ND
20230.500 ppb110.500 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
2018-09-19B18092091-001AND
2019-09-16B19091619-001A0.590 ppb
2019-10-22B19102211-001DND
2020-09-15B20091486-002A0.600 ppb
2021-09-08B21090641-001AND
2022-09-26B22092310-001AND
2022-10-31B22110004-001KND
2023-09-20B23091777-003A0.500 ppb