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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

NJ Water Supply Authority Manasquan

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.

 

23

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND10ND
2014ND40ND
2015ND40ND
2016ND30ND
2017ND20ND
2018ND60ND
2019ND30ND

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
2013-12-031061943003ND
2014-03-04340304103ND
2014-03-04340304104ND
2014-09-02340902110ND
2014-09-02340902111ND
2015-03-03350303022ND
2015-03-03350303023ND
2015-09-01350901018ND
2015-09-01350901019ND
2016-03-29360329015ND
2016-09-06360906239ND
2016-09-06360906238ND
2017-03-28370328027ND
2017-09-05370905069ND
2018-03-27380327077ND
2018-03-27380327079ND
2018-03-27380327078ND
2018-09-04380904736ND
2018-09-04380904735ND
2018-09-04380904737ND
2019-03-26390326704ND
2019-09-10390910713ND
2019-09-11390912720ND