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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Sjra Grp Sw Treatment Plant

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
2014N/A00N/A
2015N/A00N/A
2016ND60ND
2017ND20ND
2018ND20ND
2019ND20ND

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
2016-04-12AD32829ND
2016-04-12AD32827ND
2016-09-16AD50113ND
2016-09-16AD50115ND
2016-12-02AD60335ND
2016-12-02AD60339ND
2017-01-19AD65781ND
2017-01-19AD65775ND
2018-01-26AE11026ND
2018-01-26AE11030ND
2019-01-28AE51682ND
2019-01-28AE51676ND