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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Ramey Water Supply Corporation

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

 

31

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.820 ppb110.820 ppb
2015ND60ND
2016ND60ND
2017ND60ND
2018ND60ND
2019ND60ND

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
2014-12-09Q14591860010.820 ppb
2015-05-12Q1517411007ND
2015-05-12Q1517411004ND
2015-05-12Q1517411002ND
2015-05-12Q1517411015ND
2015-05-12Q1517411013ND
2015-11-02Q1542872002ND
2016-04-18Q1615100021ND
2016-04-18Q1615100019ND
2016-04-18Q1615100018ND
2016-04-18Q1615100015ND
2016-04-18Q1615100014ND
2016-09-15Q1638068001ND
2017-03-14Q1710523011ND
2017-03-14Q1710523016ND
2017-03-14Q1710523013ND
2017-03-14Q1710523009ND
2017-03-14Q1710523008ND
2017-12-05Q1762545006ND
2018-06-19Q1824220006ND
2018-06-19Q1824220018ND
2018-06-19Q1824220004ND
2018-06-19Q1824220015ND
2018-06-19Q1824220002ND
2018-06-19Q1824220014ND
2019-06-10Q1933638002ND
2019-06-10Q1933638012ND
2019-06-10Q1933638010ND
2019-06-10Q1933638008ND
2019-06-10Q1933638006ND
2019-06-10Q1933638004ND