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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Newark 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
2014ND60ND
2015ND90ND
2016ND40ND
2017ND40ND
2018ND40ND
2019ND50ND

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
2014-03-31S553907ND
2014-06-30S113249ND
2014-09-29L5279641-15ND
2014-10-1435159229001AMND
2014-10-1435159229003AMND
2014-12-22S603900ND
2015-01-2035172110001AMND
2015-03-31S614673ND
2015-04-1635184324001AMND
2015-04-1635184324005AMND
2015-06-30S637153ND
2015-07-3135200691001AMND
2015-09-30S637287ND
2015-12-30S624968ND
2015-12-30S624967ND
2016-03-30S637166ND
2016-06-29S679281ND
2016-09-29S694852ND
2016-12-12S719714ND
2017-03-28S720018ND
2017-06-28S738591ND
2017-09-27S760207ND
2017-12-19S782088ND
2018-03-26S792137ND
2018-06-26S808456ND
2018-09-26S808666ND
2018-12-17S854837ND
2019-03-28S870611ND
2019-06-27S893165ND
2019-09-25S909224ND
2019-11-08S925355ND
2019-11-08S925357ND