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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Horsham Water&sewer Authority

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

 

34

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND320ND
2015ND20ND
2016N/A00N/A
2017N/A00N/A
2018N/A00N/A
2019N/A00N/A

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
2014-06-24AE37775ND
2014-06-24AE37874ND
2014-06-24AE37769ND
2014-06-24AE37778ND
2014-06-24AE37877ND
2014-06-24AE37871ND
2014-06-24AE37868ND
2014-06-24AE37772ND
2014-06-25AE38110ND
2014-06-25AE38113ND
2014-06-25AE38116ND
2014-06-25AE38119ND
2014-06-26AE38214ND
2014-06-26AE38211ND
2014-07-03AE39279ND
2014-07-24AE41843ND
2014-09-24AE50038ND
2014-09-24AE49704ND
2014-12-05AE59397ND
2014-12-08AE59494ND
2014-12-08AE59488ND
2014-12-08AE59491ND
2014-12-09AE59781ND
2014-12-09AE59784ND
2014-12-09AE59778ND
2014-12-10AE59903ND
2014-12-10AE59900ND
2014-12-10AE59897ND
2014-12-12AE60077ND
2014-12-12AE60086ND
2014-12-12AE60080ND
2014-12-12AE60083ND
2015-03-19AE68817ND
2015-03-19AE68813ND