Know Your Environment. Protect Your Health.

Bromodichloromethane

Davis Water Works

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.

 

17

Samples

0

Samples exceeding legal limit (MCL)

6

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.425 ppb42ND - 1.000 ppb
20190.425 ppb42ND - 1.10 ppb
20200.367 ppb31ND - 1.10 ppb
2021ND10ND
20221.000 ppb21ND - 2.00 ppb
2023ND30ND

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
2018-02-08281048-2018-DWND
2018-05-17286190-2018-DW1.000 ppb
2018-08-09291870-2018-DWND
2018-11-08296745-2018-DW0.700 ppb
2019-02-07300598-2019-DWND
2019-05-02304725-2019-DW0.600 ppb
2019-08-08310069-2019-DW1.10 ppb
2019-11-07315621-2019-DWND
2020-02-06320045-2020-DWND
2020-02-06320045-2020-DWND
2020-08-06329628-2020-DW1.10 ppb
2021-08-051083698-01ND
2022-08-092085068-012.00 ppb
2022-11-142114724-01ND
2023-03-213034434-01ND
2023-05-023053112-01ND
2023-08-083084142-01ND