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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Security Waster District

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

 

54

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND540ND
2015N/A00N/A
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 Result
2014-01-14ND
2014-01-14ND
2014-01-14ND
2014-01-14ND
2014-01-14ND
2014-01-15ND
2014-01-15ND
2014-01-15ND
2014-01-21ND
2014-01-21ND
2014-01-21ND
2014-01-21ND
2014-01-22ND
2014-01-22ND
2014-01-22ND
2014-01-22ND
2014-01-29ND
2014-02-24ND
2014-02-24ND
2014-02-24ND
2014-02-24ND
2014-02-24ND
2014-02-24ND
2014-02-24ND
2014-02-24ND
2014-02-26ND
2014-02-26ND
2014-02-26ND
2014-02-26ND
2014-02-26ND
2014-02-26ND
2014-04-21ND
2014-04-21ND
2014-04-22ND
2014-07-15ND
2014-07-29ND
2014-07-29ND
2014-07-29ND
2014-07-29ND
2014-07-30ND
2014-07-30ND
2014-07-30ND
2014-07-30ND
2014-07-30ND
2014-07-30ND
2014-07-30ND
2014-07-30ND
2014-07-30ND
2014-07-30ND
2014-07-31ND
2014-08-11ND
2014-08-14ND
2014-09-09ND
2014-10-27ND