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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Schuylkill County. Municipal 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.

 

26

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND180ND
2015ND40ND
2016ND40ND
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
2014-01-1414011160-01ND
2014-01-1414011160-03ND
2014-01-1414011160-07ND
2014-01-1414011160-05ND
2014-04-1414041441-05ND
2014-04-1414041441-03ND
2014-04-1414041441-01ND
2014-07-1414071744-01ND
2014-07-1414071746-01ND
2014-07-1414071748-01ND
2014-07-1714071751-01ND
2014-07-22L5170812-4ND
2014-07-22L5170812-3ND
2014-07-22L5170812-2ND
2014-07-22L5170812-1ND
2014-10-1314100619-01ND
2014-10-1314100620-01ND
2014-10-1314100618-01ND
2015-07-2113055343ND
2015-07-2113055289ND
2015-07-2113055235ND
2015-07-2113055181ND
2016-07-1914793913ND
2016-07-1914793858ND
2016-07-1914793803ND
2016-07-2514627349ND