Know Your Environment. Protect Your Health.

Bromodichloromethane

Gig Harbor Water Department

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.

 

36

Samples

0

Samples exceeding legal limit (MCL)

4

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
20190.0393 ppb141ND - 0.550 ppb
2020N/A00N/A
2021ND90ND
20220.126 ppb51ND - 0.630 ppb
20230.295 ppb42ND - 0.620 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
2018-08-08ND
2018-08-08ND
2018-08-08ND
2018-08-08ND
2019-03-21ND
2019-05-13ND
2019-05-13ND
2019-05-13ND
2019-05-13ND
2019-05-13ND
2019-08-08ND
2019-08-08ND
2019-08-080.550 ppb
2019-08-08ND
2019-08-22ND
2019-08-22ND
2019-08-22ND
2019-08-22ND
2021-08-034159320ND
2021-08-034159321ND
2021-08-034159322ND
2021-08-034159323ND
2021-08-174163790ND
2021-08-174163792ND
2021-08-174163793ND
2021-08-174163791ND
2021-08-174163798ND
2022-08-094338678ND
2022-08-0943386810.630 ppb
2022-08-094338676ND
2022-08-094338674ND
2022-09-194363148ND
2023-08-0745057590.560 ppb
2023-08-074505762ND
2023-08-074505760ND
2023-08-0745057610.620 ppb