Know Your Environment. Protect Your Health.

Bromodichloromethane

Western Hills Water System

Bromodichloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Bromodichloromethane and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

 

31

Samples

0

Samples exceeding legal limit (MCL)

12

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20181.12 ppb53ND - 2.20 ppb
20190.860 ppb51ND - 4.30 ppb
20202.80 ppb51ND - 14.0 ppb
202117.0 ppb63ND - 100.0 ppb
20221.24 ppb52ND - 5.20 ppb
20230.520 ppb52ND - 1.60 ppb

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.06 ppb

The EWG Health Guideline of 0.06 ppb for bromodichloromethane 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
2018-09-18AE407292.20 ppb
2018-09-18AE407351.30 ppb
2018-09-18AE407452.10 ppb
2018-09-18AE40749ND
2018-09-18AE40707ND
2019-06-17AE71118ND
2019-06-17AE71138ND
2019-06-17AE71098ND
2019-06-17AE710904.30 ppb
2019-06-17AE71069ND
2020-06-15AF15203ND
2020-06-15AF15206ND
2020-06-15AF1520814.0 ppb
2020-06-15AF15210ND
2020-06-15AF15214ND
2021-08-03AF644371.10 ppb
2021-08-03AF64455100.0 ppb
2021-08-03AF64451ND
2021-08-03AF64447ND
2021-09-23AF71029ND
2021-10-14AF736031.000 ppb
2022-03-22AF900501.000 ppb
2022-03-22AF90052ND
2022-03-22AF90054ND
2022-06-07AF99862ND
2022-10-04AG159205.20 ppb
2023-07-12AG481481.000 ppb
2023-07-12AG48162ND
2023-07-12AG48172ND
2023-07-12AG48178ND
2023-07-12AG481801.60 ppb