Know Your Environment. Protect Your Health.

Dibromochloromethane

Dublin, Town of

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.

 

48

Samples

0

Samples exceeding legal limit (MCL)

26

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.513 ppb86ND - 0.900 ppb
20190.350 ppb84ND - 1.000 ppb
20200.413 ppb85ND - 0.900 ppb
20210.475 ppb86ND - 0.800 ppb
20220.250 ppb83ND - 0.700 ppb
20230.125 ppb82ND - 0.500 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
2018-03-05E1802027960.600 ppb
2018-03-05E180202798ND
2018-06-05E180503434ND
2018-06-05E1805034360.700 ppb
2018-09-05E1808032270.900 ppb
2018-09-05E1808032280.700 ppb
2018-12-03E1811027880.600 ppb
2018-12-03E1811027910.600 ppb
2019-03-05E190201451ND
2019-03-05E190201452ND
2019-06-03E1905027620.700 ppb
2019-06-03E1905027631.000 ppb
2019-09-04E1908041500.500 ppb
2019-09-04E1908041510.600 ppb
2019-12-03E191102176ND
2019-12-03E191102175ND
2020-03-03E2002020780.700 ppb
2020-03-03E200202079ND
2020-06-01E200502334ND
2020-06-01E200502337ND
2020-09-02E2008004410.700 ppb
2020-09-02E2008004430.900 ppb
2020-12-01E2011021360.500 ppb
2020-12-01E2011021370.500 ppb
2021-03-02E210203211ND
2021-03-02E2102032080.600 ppb
2021-06-01E210502350ND
2021-06-01E2105023520.600 ppb
2021-09-01E2108041560.800 ppb
2021-09-01E2108041570.700 ppb
2021-12-01E2111028180.500 ppb
2021-12-01E2111028200.600 ppb
2022-03-01E220202768ND
2022-03-01E220202767ND
2022-06-01E220503274ND
2022-06-01E220503277ND
2022-09-07E2208039710.700 ppb
2022-09-07E2208039720.600 ppb
2022-12-05E2211029460.700 ppb
2022-12-05E221102948ND
2023-03-01E2302033840.500 ppb
2023-03-01E2302033870.500 ppb
2023-06-05E230504137ND
2023-06-05E230504139ND
2023-09-06E230804206ND
2023-09-06E230804208ND
2023-12-04E231102539ND
2023-12-04E231102541ND