Know Your Environment. Protect Your Health.

Dibromochloromethane

Town of Westover Hills

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)

15

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.280 ppb41ND - 1.12 ppb
20191.64 ppb43ND - 3.13 ppb
20200.423 ppb41ND - 1.69 ppb
20211.02 ppb43ND - 1.51 ppb
20220.883 ppb43ND - 1.31 ppb
20231.68 ppb441.28 ppb - 2.14 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
2018-01-22Q1802290004ND
2018-04-18Q18157360021.12 ppb
2018-08-02Q1830870002ND
2018-10-25Q1842723002ND
2019-02-06Q19054970051.08 ppb
2019-04-29Q19169080023.13 ppb
2019-09-13Q19652780022.36 ppb
2019-11-21Q1977740002ND
2020-02-18Q2006087002ND
2020-04-30Q2016737002ND
2020-09-01Q20348350021.69 ppb
2020-11-23Q2046946001ND
2021-02-25Q21050390021.39 ppb
2021-04-28Q21107410021.17 ppb
2021-08-03Q21201830021.51 ppb
2021-11-15Q2131781002ND
2022-03-03Q2207361005ND
2022-05-12Q22142870021.13 ppb
2022-09-12Q22269520021.31 ppb
2022-11-04Q22335200021.09 ppb
2023-01-18Q23025980021.28 ppb
2023-04-20Q23148840021.95 ppb
2023-09-12Q23391150021.35 ppb
2023-11-16Q23494000042.14 ppb