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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Morris County MUA

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.

 

24

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND160ND
20150.0863 ppb880.0600 ppb - 0.120 ppb
2016N/A00N/A
2017N/A00N/A
2018N/A00N/A
2019N/A00N/A

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
2014-03-18775629-10977ND
2014-03-18775621-10977ND
2014-03-18775627-10977ND
2014-03-18775625-10977ND
2014-03-18775623-10977ND
2014-03-18775619-10977ND
2014-03-18775615-10977ND
2014-03-18775617-10977ND
2014-09-17819521-12402ND
2014-09-17819517-12392ND
2014-09-17819519-12402ND
2014-09-17819535-12423ND
2014-09-17819523-12402ND
2014-09-17819533-12402ND
2014-09-17819529-12402ND
2014-09-17819531-12402ND
2015-05-20L5609232-80.0700 ppb
2015-05-20L5609232-30.0600 ppb
2015-05-20L5609232-50.0800 ppb
2015-05-20L5609232-40.120 ppb
2015-05-20L5609232-20.0600 ppb
2015-05-20L5609232-10.110 ppb
2015-05-20L5609232-70.0900 ppb
2015-05-20L5609232-60.1000 ppb