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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Midwest City

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.

 

28

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND130ND
2015ND150ND
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
2014-11-034K05154-28ND
2014-11-034K05154-31ND
2014-11-034K05154-16ND
2014-11-034K05154-13ND
2014-11-034K05154-07ND
2014-11-034K05154-19ND
2014-11-034K05154-25ND
2014-11-034K05154-10ND
2014-11-034K05154-34ND
2014-11-034K05154-22ND
2014-11-034K05154-37ND
2014-11-034K05154-04ND
2014-11-034K05154-01ND
2015-02-045B04037-01ND
2015-05-045E06213-10ND
2015-05-045E06213-34ND
2015-05-045E06213-25ND
2015-05-045E06213-07ND
2015-05-045E06213-22ND
2015-05-045E06213-01ND
2015-05-045E06213-63ND
2015-05-045E06213-31ND
2015-05-045E06213-04ND
2015-05-045E06213-13ND
2015-05-045E06213-16ND
2015-05-045E06213-19ND
2015-05-045E06213-28ND
2015-08-045H04059-01ND