Know Your Environment. Protect Your Health.

Dibromochloromethane

Coulterville

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)

19

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.325 ppb42ND - 0.686 ppb
20190.940 ppb43ND - 2.07 ppb
20200.810 ppb440.650 ppb - 1.11 ppb
20210.551 ppb43ND - 0.941 ppb
20220.979 ppb440.572 ppb - 1.76 ppb
20230.695 ppb43ND - 1.03 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
2018-02-138022181-02ND
2018-05-158053308-020.613 ppb
2018-08-208084327-020.686 ppb
2018-11-048110985-02ND
2019-02-039020409-02ND
2019-05-059051338-020.661 ppb
2019-08-049080780-022.07 ppb
2019-11-179113135-021.03 ppb
2020-02-020020627-020.650 ppb
2020-05-030050537-021.11 ppb
2020-08-090082272-020.719 ppb
2020-11-220114365-020.761 ppb
2021-02-07EB01721-02ND
2021-05-02EE00500-020.636 ppb
2021-08-16EH04018-020.941 ppb
2021-11-07EK01880-020.628 ppb
2022-02-15FB03272-020.572 ppb
2022-05-08FE01935-021.01 ppb
2022-08-08FH02266-021.76 ppb
2022-11-20FK04195-020.573 ppb
2023-02-12GB02608-021.03 ppb
2023-05-15GE03475-020.954 ppb
2023-08-13GH03092-020.797 ppb
2023-11-05GK01056-02ND