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EWG's Tap Water Database — 2019 UPDATE

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Chloromethane

South Coast Water District - Capistrano Beach

Chloromethane is an industrial solvent, aerosol propellant and a refrigerant. It also forms as a byproduct of water disinfection. The EPA classifies chloromethane as possibly carcinogenic to humans.

 

12

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND10ND
2013N/A00N/A
2014ND90ND
2015N/A00N/A
2016N/A00N/A
2017ND20ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 2.69 ppb

The EWG Health Guideline of 2.69 ppb for chloromethane was defined by the Environmental Protection Agency as a benchmark for testing under the Unregulated Contaminant Monitoring Rule program. This health guideline protects against cancer.

ppb = parts per billion

All test results

Date Lab ID Result
2012-01-181805-007-1101ND
2014-01-131805-007-0755ND
2014-01-291805-007-1324ND
2014-02-12201402120885AMND
2014-02-12201402120889AMND
2014-02-191805-007-1424ND
2014-05-14201405150281AMND
2014-08-12201408120507AMND
2014-08-12201408120504AMND
2014-11-06201411070510AMND
2017-02-211805-007-1618ND
2017-02-211805-010-1615ND