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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Acton Water Supply District

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

 

119

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND140ND
2014ND210ND
2015ND160ND
2016ND180ND
2017ND170ND
2018ND150ND
2019ND180ND

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 Result
2013-05-13ND
2013-05-13ND
2013-05-13ND
2013-05-14ND
2013-05-14ND
2013-05-14ND
2013-08-13ND
2013-08-13ND
2013-11-19ND
2013-11-19ND
2013-11-20ND
2013-12-09ND
2013-12-09ND
2013-12-09ND
2014-02-11ND
2014-02-11ND
2014-02-20ND
2014-05-19ND
2014-07-16ND
2014-07-16ND
2014-07-16ND
2014-08-04ND
2014-08-04ND
2014-08-04ND
2014-08-04ND
2014-08-04ND
2014-08-04ND
2014-08-04ND
2014-08-15ND
2014-08-15ND
2014-08-15ND
2014-08-15ND
2014-08-15ND
2014-08-26ND
2014-10-20ND
2015-06-26ND
2015-08-03ND
2015-08-03ND
2015-08-03ND
2015-08-03ND
2015-08-03ND
2015-08-17ND
2015-08-17ND
2015-08-17ND
2015-08-17ND
2015-08-17ND
2015-08-17ND
2015-09-14ND
2015-09-14ND
2015-09-14ND
2015-11-30ND
2016-02-10ND
2016-06-06ND
2016-07-14ND
2016-07-25ND
2016-07-29ND
2016-07-29ND
2016-07-29ND
2016-08-08ND
2016-09-07ND
2016-09-07ND
2016-09-07ND
2016-09-07ND
2016-09-07ND
2016-09-07ND
2016-09-22ND
2016-09-22ND
2016-09-22ND
2016-11-17ND
2017-02-01ND
2017-05-03ND
2017-07-12ND
2017-07-12ND
2017-07-12ND
2017-07-27ND
2017-07-27ND
2017-08-09ND
2017-08-09ND
2017-08-09ND
2017-08-09ND
2017-08-09ND
2017-08-09ND
2017-12-11ND
2017-12-11ND
2017-12-11ND
2017-12-11ND
2018-03-14ND
2018-06-11ND
2018-07-26ND
2018-07-26ND
2018-07-26ND
2018-09-05ND
2018-09-05ND
2018-09-05ND
2018-09-19ND
2018-09-19ND
2018-09-19ND
2018-09-19ND
2018-09-19ND
2018-09-19ND
2018-12-10ND
2019-03-26ND
2019-05-14ND
2019-07-24ND
2019-07-24ND
2019-07-25ND
2019-07-25ND
2019-07-25ND
2019-07-25ND
2019-07-31ND
2019-07-31ND
2019-09-10ND
2019-09-16ND
2019-09-16ND
2019-09-16ND
2019-09-16ND
2019-09-16ND
2019-09-16ND
2019-12-11ND