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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Aquarion Water - NH

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
2014ND180ND
2015ND100ND
2016ND60ND
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
2014-07-15133675.02ND
2014-07-15133675.01ND
2014-07-17133762.01ND
2014-07-17133762.02ND
2014-07-17133762.03ND
2014-07-17133762.04ND
2014-07-17133762.05ND
2014-08-11134678.03ND
2014-08-11134678.02ND
2014-08-11134678.01ND
2014-09-15201409160286AMND
2014-09-15201409160360AMND
2014-09-15201409160387AMND
2014-09-15201409160300AMND
2014-09-16201409170788AMND
2014-09-16201409170706AMND
2014-09-16201409170702AMND
2014-09-16201409170791AMND
2015-03-10201503110656AMND
2015-03-10201503110753AMND
2015-03-10201503110748AMND
2015-03-11201503120722AMND
2015-03-11201503120677AMND
2015-03-11201503120695AMND
2015-03-11201503120711AMND
2015-04-07201504080518AMND
2015-07-21145972.02ND
2015-07-21145972.01ND
2016-04-05154457.02ND
2016-07-26158731.04ND
2016-07-26158731.03ND
2016-07-26158731.02ND
2016-07-26158731.01ND
2016-07-27158731.05ND