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EWG's Tap Water Database

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Chloromethane

Warminster 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.

 

38

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2010N/A00N/A
2011N/A00N/A
2012N/A00N/A
2013ND180ND
2014ND200ND
2015N/A00N/A

ppb = parts per billion.

State and national drinking water standards and health guidelines

Health Guideline 2.69 ppb

The 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
2013-11-191059680010ND
2013-11-191059680019ND
2013-11-191059680022ND
2013-11-191059680034ND
2013-11-191059680037ND
2013-11-191059680031ND
2013-11-191059680004ND
2013-11-191059680007ND
2013-11-191059680001ND
2013-11-191059680016ND
2013-11-191059680013ND
2013-11-191059680028ND
2013-11-191059680049ND
2013-11-191059680025ND
2013-11-191059680043ND
2013-11-191059680040ND
2013-11-191059680052ND
2013-11-191059680046ND
2014-02-191072717001ND
2014-05-202008319001ND
2014-05-202008319016ND
2014-05-202008319034ND
2014-05-202008319010ND
2014-05-202008319013ND
2014-05-202008319019ND
2014-05-202008319007ND
2014-05-202008319004ND
2014-05-202008319046ND
2014-05-202008319049ND
2014-05-202008319025ND
2014-05-202008319031ND
2014-05-202008319040ND
2014-05-202008319028ND
2014-05-202008319037ND
2014-05-202008319022ND
2014-05-202008319043ND
2014-06-092011601001ND
2014-08-192024764001ND