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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Woden Water Supply Corporation

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

 

31

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND10ND
2015ND60ND
2016ND60ND
2017ND60ND
2018ND60ND
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
2014-06-09Q1419948026ND
2015-06-25Q1524222001ND
2015-08-12Q1531879002ND
2015-10-08Q1539627007ND
2015-10-08Q1539627006ND
2015-10-08Q1539627003ND
2015-10-08Q1539627002ND
2016-10-03Q1641602010ND
2016-10-03Q1641602008ND
2016-10-03Q1641602005ND
2016-10-03Q1641602003ND
2016-10-03Q1641602001ND
2016-12-02Q1652669001ND
2017-09-14Q1743897012ND
2017-09-14Q1743897016ND
2017-09-14Q1743897013ND
2017-09-14Q1743897009ND
2017-09-14Q1743897004ND
2017-09-14Q1743897055ND
2018-03-20Q1811091002ND
2018-03-20Q1811091018ND
2018-03-20Q1811091012ND
2018-03-20Q1811091015ND
2018-03-20Q1811091009ND
2018-03-20Q1811091014ND
2019-01-16Q1902343013ND
2019-01-16Q1902343010ND
2019-01-16Q1902343009ND
2019-01-16Q1902343004ND
2019-01-16Q1902343007ND
2019-10-08Q1972051001ND