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EWG's Tap Water Database — 2019 UPDATE

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Bromochloromethane

Contra Costa Water District

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.

 

9

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
20130.0414 ppb84ND - 0.0970 ppb
2014N/A00N/A
2015N/A00N/A
2016N/A00N/A
2017ND10ND

ppb = parts per billion

All test results

Date Lab ID Result
2013-03-19201303200300AMND
2013-03-20201303210135AMND
2013-06-11201306120211AM0.0940 ppb
2013-06-12201306130200AMND
2013-09-10201309110439AM0.0970 ppb
2013-09-11201309120475AM0.0600 ppb
2013-12-10201312120835AM0.0800 ppb
2013-12-11201312120837AMND
2017-12-199590-003-1330ND