Know Your Environment. Protect Your Health.

Bromochloromethane

Williams Water Supply

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.

 

7

Samples

0

Samples exceeding legal limit (MCL)

7

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
20190.700 ppb110.700 ppb
2020N/A00N/A
20211.75 ppb221.50 ppb - 2.00 ppb
20221.35 ppb440.800 ppb - 1.60 ppb
2023N/A00N/A

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

Date Lab ID Result
2019-02-04OE7673550.700 ppb
2021-08-02OE17788921.50 ppb
2021-11-01OE19155302.00 ppb
2022-02-01OE20350341.50 ppb
2022-06-15OE21184871.60 ppb
2022-08-09OE21534531.50 ppb
2022-11-01OE22008100.800 ppb