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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Clifton Park Water Authority

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

 

42

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20130.0822 ppb91ND - 0.740 ppb
20140.0260 ppb101ND - 0.260 ppb
2015ND10ND
2016ND90ND
2017ND30ND
2018ND40ND
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
2013-09-17201309180538AMND
2013-09-17201309180703AM0.740 ppb
2013-09-18201309190533AMND
2013-09-18201309190536AMND
2013-09-18201309190541AMND
2013-09-30201310010131AMND
2013-09-30201310010133AMND
2013-09-30201310010129AMND
2013-12-18201312190384AMND
2014-03-19201403200336AMND
2014-03-19201403200408AMND
2014-03-19201403200338AMND
2014-03-19201403200396AMND
2014-03-25201403270423AMND
2014-03-25201403270165AM0.260 ppb
2014-03-25201403270284AMND
2014-03-25201403270431AMND
2014-07-16201407180255AMND
2014-10-20C002981-POCSND
2015-02-23C005541-01-POCSND
2016-05-09160509024POCSND
2016-06-08160608092-001-POND
2016-06-08160608089-POCSND
2016-06-08160608084-POCSND
2016-06-08160608094-POCSND
2016-06-08160608090-POCSND
2016-06-08160608095-001-POND
2016-06-08160608088001-POCND
2016-06-08160608087-POCSND
2017-06-27170627043-05-POCND
2017-06-27170627043-POCSND
2017-10-05C030388-01-POCSND
2018-06-18C036389-01-POCSND
2018-06-18C036388-POCSND
2018-06-18C036388-02-POCSND
2018-09-04C038878-01-POCSND
2019-06-11C045464-07-POCSND
2019-06-11C045464-03-POCSND
2019-06-11C045464-04-POCSND
2019-06-11C045464-01-POCSND
2019-06-11C045464-06-POCSND
2019-06-11C045464-02-POCSND