Know Your Environment. Protect Your Health.

Bromodichloromethane

Western Hills Harbor

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.

 

26

Samples

0

Samples exceeding legal limit (MCL)

4

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.302 ppb51ND - 1.51 ppb
2019ND50ND
2020ND50ND
2021ND50ND
20220.917 ppb32ND - 1.70 ppb
20230.727 ppb31ND - 2.18 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
2018-01-22Q1802343010ND
2018-01-22Q1802343001ND
2018-05-31Q18216310011.51 ppb
2018-07-23Q1829048001ND
2018-10-03Q1839557002ND
2019-01-30Q1904578002ND
2019-04-18Q1915697003ND
2019-04-18Q1915697006ND
2019-08-27Q1959859002ND
2019-11-06Q1976026002ND
2020-01-28Q2003239002ND
2020-04-27Q2016255001ND
2020-04-27Q2016255004ND
2020-07-30Q2029892002ND
2020-10-07Q2039324002ND
2021-03-08Q2105929003ND
2021-03-08Q2105929009ND
2021-06-23Q2116461002ND
2021-08-09Q2121012002ND
2021-10-21Q2129793002ND
2022-09-20Q22280640011.05 ppb
2022-09-20Q22280640021.70 ppb
2022-10-31Q2233052001ND
2023-08-15Q23340400032.18 ppb
2023-09-25Q2341212001ND
2023-11-30Q2351063001ND