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EWG's Tap Water Database — 2019 UPDATE

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Chloromethane

Palmer Water District No.1

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.

 

44

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND70ND
2013ND130ND
2014ND90ND
2015ND50ND
2016ND50ND
2017ND50ND

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
2012-07-18ND
2012-07-18ND
2012-07-18ND
2012-07-18ND
2012-07-18ND
2012-12-11ND
2012-12-11ND
2013-03-11ND
2013-03-11ND
2013-05-13ND
2013-05-13ND
2013-07-09ND
2013-07-09ND
2013-09-17ND
2013-09-17ND
2013-09-17ND
2013-09-17ND
2013-09-17ND
2013-12-10ND
2013-12-10ND
2014-02-18ND
2014-02-18ND
2014-09-24ND
2014-09-24ND
2014-09-24ND
2014-09-24ND
2014-09-24ND
2014-11-24ND
2014-11-24ND
2015-08-10ND
2015-08-10ND
2015-08-10ND
2015-08-10ND
2015-08-10ND
2016-08-09ND
2016-08-09ND
2016-08-09ND
2016-08-09ND
2016-08-09ND
2017-11-15ND
2017-11-15ND
2017-11-15ND
2017-11-15ND
2017-11-15ND