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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Larchmont Utilities

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

 

45

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND120ND
2015ND90ND
2016ND80ND
2017ND70ND
2018ND30ND
2019ND60ND

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
2014-07-30AI47602ND
2014-07-30AI47601ND
2014-07-30AI47600ND
2014-07-30AI47491ND
2014-07-30AI47490ND
2014-07-30AI47489ND
2014-08-18AI50185ND
2014-08-18AI50184ND
2014-10-14AI57511ND
2014-10-14AI57512ND
2014-12-0335166428001AMND
2014-12-0335166428003AMND
2015-01-13AI62745ND
2015-01-13AI62746ND
2015-04-16AI75079ND
2015-04-16AI75078ND
2015-06-1835193723001AMND
2015-06-1835193723003AMND
2015-07-06AI81494ND
2015-07-06AI81493ND
2015-10-12AI92609ND
2016-01-19AJ04676ND
2016-01-19AJ04677ND
2016-01-19AJ04675ND
2016-06-08AJ13891ND
2016-06-08AJ13890ND
2016-07-07AJ16847ND
2016-07-07AJ16811ND
2016-10-28AJ32355ND
2017-03-21AJ48561ND
2017-03-21AJ48560ND
2017-03-21AJ48562ND
2017-03-21AJ48563ND
2017-03-21AJ48566ND
2017-03-21AJ48567ND
2017-04-07AJ52864ND
2018-02-28AJ85012ND
2018-02-28AJ85011ND
2018-03-01AJ85013ND
2019-03-05AK12808ND
2019-03-05AK12807ND
2019-03-05AK12806ND
2019-03-05AK12805ND
2019-07-17AK22860ND
2019-12-18AK38848ND