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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Southwood Water System

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
2014ND100ND
2015ND150ND
2016ND40ND
2017ND70ND
2018ND40ND
2019ND50ND

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
2014-08-11201408120484AMND
2014-08-11201408120479AMND
2014-08-11201408120563AMND
2014-08-12201408130697AMND
2014-08-12201408130715AMND
2014-08-12201408130887AMND
2014-08-13201408140382AMND
2014-08-13201408140377AMND
2014-08-20201408210235AMND
2014-11-01201411040290AMND
2015-02-12201502130422AMND
2015-02-16201502170142AMND
2015-02-16201502170128AMND
2015-02-16201502170153AMND
2015-02-23201502240590AMND
2015-02-23201502240388AMND
2015-02-23201502240369AMND
2015-02-25201502260184AMND
2015-03-1174808ND
2015-03-1174809ND
2015-03-1174807ND
2015-03-1174806ND
2015-03-16201503170671AMND
2015-03-16201503170493AMND
2015-07-0775114ND
2016-03-11ND
2016-03-14ND
2016-04-14ND
2016-05-13ND
2017-02-22ND
2017-02-22ND
2017-02-22ND
2017-02-22ND
2017-02-22ND
2017-02-22ND
2017-02-22ND
2018-03-14ND
2018-03-14ND
2018-05-04ND
2018-07-19ND
2019-06-26ND
2019-07-12ND
2019-07-12ND
2019-09-05ND
2019-10-15ND