Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Chloromethane

Hudson Waterworks

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

 

37

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND200ND
2015ND40ND
2016N/A00N/A
2017ND50ND
2018ND20ND
20190.160 ppb63ND - 0.340 ppb

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
2014-02-11770163-10759ND
2014-02-11770157-10759ND
2014-02-11770161-10759ND
2014-02-11770165-10759ND
2014-02-12770588-10774ND
2014-02-27772524-10816ND
2014-03-26776792ND
2014-03-26776786ND
2014-03-26776789ND
2014-03-31777341ND
2014-06-16797090ND
2014-06-18797882ND
2014-08-04808055-12016ND
2014-08-04808057-12016ND
2014-08-04808059-12016ND
2014-08-05808537-12016ND
2014-08-05808535-12016ND
2014-08-05808532-12016ND
2014-08-25812921ND
2014-11-05830047ND
2015-02-04841974ND
2015-05-04857799ND
2015-07-14870837ND
2015-10-21890287ND
2017-04-03980878ND
2017-04-03980874ND
2017-04-03980883ND
2017-04-04981146ND
2017-04-05981439ND
2018-06-251063650ND
2018-10-231088635ND
2019-02-261106795ND
2019-03-1911104080.340 ppb
2019-03-1911104100.320 ppb
2019-03-1911104090.300 ppb
2019-05-081119849ND
2019-08-061139065ND