Know Your Environment. Protect Your Health.

Dibromochloromethane

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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.

 

24

Samples

0

Samples exceeding legal limit (MCL)

21

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.536 ppb43ND - 0.890 ppb
20190.710 ppb43ND - 1.16 ppb
20200.671 ppb43ND - 1.40 ppb
20211.02 ppb440.661 ppb - 1.24 ppb
20221.37 ppb440.741 ppb - 2.58 ppb
20231.33 ppb440.963 ppb - 1.69 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
2018-02-068020937-020.665 ppb
2018-05-018050417-02ND
2018-08-078081689-020.890 ppb
2018-11-068111260-020.589 ppb
2019-02-059020828-02ND
2019-05-149053158-020.714 ppb
2019-08-069081370-021.16 ppb
2019-11-059110879-020.965 ppb
2020-02-040020880-02ND
2020-05-050050857-021.40 ppb
2020-08-110082600-020.515 ppb
2020-11-030110729-020.767 ppb
2021-02-02EB00772-021.02 ppb
2021-05-11EE02315-021.16 ppb
2021-08-03EH01307-021.24 ppb
2021-11-01EK00328-020.661 ppb
2022-02-08FB01598-021.11 ppb
2022-05-03FE00605-022.58 ppb
2022-08-09FH02316-020.741 ppb
2022-11-01FK00458-021.05 ppb
2023-02-15GB03237-020.963 ppb
2023-05-11GE02714-021.42 ppb
2023-08-07GH02073-021.69 ppb
2023-11-06GK01097-021.23 ppb