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.

 

31

Samples

0

Samples exceeding legal limit (MCL)

28

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20181.10 ppb330.600 ppb - 2.00 ppb
20191.23 ppb86ND - 2.10 ppb
20201.85 ppb880.700 ppb - 3.00 ppb
20211.36 ppb880.900 ppb - 2.00 ppb
20220.467 ppb32ND - 0.700 ppb
20231.20 ppb111.20 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
2018-07-2318G1472-012.00 ppb
2018-10-1618J0930-010.600 ppb
2018-10-1618J0930-020.700 ppb
2019-01-1619A0659-011.80 ppb
2019-01-1619A0659-022.00 ppb
2019-05-1619E1336-012.10 ppb
2019-05-1619E1336-021.90 ppb
2019-07-2219G1586-011.000 ppb
2019-07-2219G1586-021.000 ppb
2019-10-2919J1666-01ND
2019-10-2919J1666-02ND
2020-01-1520A0669-011.30 ppb
2020-01-1520A0669-021.20 ppb
2020-04-1420D0457-012.50 ppb
2020-04-1420D0457-022.50 ppb
2020-07-1420G0933-010.700 ppb
2020-07-1420G0933-020.800 ppb
2020-10-2020J1066-013.00 ppb
2020-10-2020J1066-022.80 ppb
2021-01-1221A0348-012.00 ppb
2021-01-1221A0348-021.50 ppb
2021-04-1321D0735-011.70 ppb
2021-04-1321D0735-021.50 ppb
2021-08-1021H0864-011.10 ppb
2021-08-1021H0864-021.10 ppb
2021-10-1921J0972-011.10 ppb
2021-10-1921J0972-020.900 ppb
2022-01-2522A0936-010.700 ppb
2022-01-2522A0936-020.700 ppb
2022-07-1222G0621-01ND
2023-07-1823G1115-011.20 ppb