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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

East Hanover Twp Water Department

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.

MORE ABOUT THIS CONTAMINANT

 

32

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND50ND
2015ND100ND
20160.300 ppb41ND - 1.20 ppb
2017ND50ND
2018ND40ND
2019ND40ND

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
2014-01-23340123046ND
2014-01-23340123045ND
2014-05-27340527055ND
2014-07-21340721053ND
2014-10-20341020034ND
2015-01-20350120052ND
2015-04-20350420022ND
2015-04-2235185421005AMND
2015-04-2235185421001AMND
2015-07-20350720053ND
2015-09-2402003 0915ND
2015-09-2401001 0915ND
2015-09-2490001 _0915ND
2015-10-19351019127ND
2015-12-1490001 1215ND
2016-01-19360119106ND
2016-04-18360418117ND
2016-07-18360718098ND
2016-10-173610170721.20 ppb
2017-01-23370123022ND
2017-02-06370206087ND
2017-04-17370417073ND
2017-07-17370717080ND
2017-10-16371016015ND
2018-01-16380116188ND
2018-04-16380416062ND
2018-07-16380716082ND
2018-10-15381015012ND
2019-01-22390122127ND
2019-04-16390417203ND
2019-07-16390716016ND
2019-10-22391022158ND