Know Your Environment. Protect Your Health.

Dibromochloromethane

Generation Park Management 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.

 

24

Samples

0

Samples exceeding legal limit (MCL)

9

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20181.90 ppb42ND - 4.40 ppb
20190.275 ppb41ND - 1.10 ppb
20200.925 ppb42ND - 2.70 ppb
20211.38 ppb43ND - 2.30 ppb
2022ND40ND
20230.275 ppb41ND - 1.10 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
2018-02-14AE140124.40 ppb
2018-05-23AE273983.20 ppb
2018-08-30AE38911ND
2018-10-02AE42340ND
2019-03-14AE584271.10 ppb
2019-06-03AE68874ND
2019-09-04AE81996ND
2019-11-07AE88886ND
2020-02-13AE98403ND
2020-04-29AF08696ND
2020-07-27AF206321.000 ppb
2020-11-09AF336932.70 ppb
2021-02-01AF41891ND
2021-06-10AF574632.30 ppb
2021-08-11AF658361.10 ppb
2021-11-01AF752152.10 ppb
2022-02-07AF83252ND
2022-04-25AF94211ND
2022-08-23AG10482ND
2022-11-21AG19422ND
2023-01-25AG26437ND
2023-04-17AG36870ND
2023-07-25AG49994ND
2023-10-30AG614551.10 ppb