Know Your Environment. Protect Your Health.

Bromochloromethane

King County Water District #20

NOTE: King County Water District #20 purchases water from Seattle Public Utilities which is required to test for bromochloromethane. Sample information shown below was taken by Seattle Public Utilities.

Bromochloromethane is a tap water disinfection byproduct; it is also used as an intermediate in chemical manufacturing and as a fire extinguishing agent. Disinfection byproducts in drinking water increase the risk of cancer.

 

10

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND10ND
2014ND30ND
2015ND80ND
2016N/A00N/A
2017N/A00N/A
2018N/A00N/A
2019N/A00N/A
2020N/A00N/A
2021N/A00N/A
2022N/A00N/A
2023ND20ND

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 bromochloromethane was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer, harm to reproduction and child development, and change to fetal growth and development.

ppb = parts per billion

All test results

NOTE: King County Water District #20 purchases water from Seattle Public Utilities which is required to test for bromochloromethane. Sample information shown below was taken by Seattle Public Utilities.

Date Lab ID Result
2015-01-13201501140525AMND
2015-01-13201501140778AMND
2015-04-06201504070229AMND
2015-04-06201504070359AMND
2015-07-22201507230482AMND
2015-07-22201507230496AMND
2015-10-13201509280091AMND
2015-10-13201509280090AMND
2023-08-154542961ND
2023-08-154542962ND