Know Your Environment. Protect Your Health.

Dibromochloromethane

Cathedral Gardens Water District

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.

 

12

Samples

0

Samples exceeding legal limit (MCL)

12

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.00873 ppb631ND - 0.550 ppb
2019ND450ND
20200.947 ppb330.810 ppb - 1.10 ppb
20210.945 ppb440.580 ppb - 1.30 ppb
20220.963 ppb330.930 ppb - 0.990 ppb
20231.25 ppb221.10 ppb - 1.40 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
2020-03-03701236490010.930 ppb
2020-03-03701236490020.810 ppb
2020-12-02701552280011.10 ppb
2021-03-05701647830040.800 ppb
2021-03-05701647830020.580 ppb
2021-11-24701958320021.10 ppb
2021-11-24701958320011.30 ppb
2022-03-11702071870020.930 ppb
2022-03-11702071870010.990 ppb
2022-05-05702135470020.970 ppb
2023-03-09702488810011.10 ppb
2023-03-09702488810021.40 ppb