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EWG's Tap Water Database — 2019 UPDATE

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Chloromethane

City of Hewitt

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.

 

21

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND10ND
2013ND50ND
2014ND60ND
2015ND30ND
2016ND30ND
2017ND30ND

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
2012-01-12AB77664ND
2013-02-121302396002ND
2013-10-09Q1308728007ND
2013-10-09Q1308728001ND
2013-10-09Q1308728003ND
2013-10-09Q1308728005ND
2014-01-14AC38665ND
2014-04-17Q1412218001ND
2014-04-17Q1412218005ND
2014-04-17Q1412218007ND
2014-04-17Q1412218003ND
2014-07-29Q1431973001ND
2015-03-23AC85649ND
2015-03-23AC85645ND
2015-03-23AC85655ND
2016-01-20AD19002ND
2016-01-20AD19012ND
2016-04-06AD32129ND
2017-04-03AD78087ND
2017-10-09AD99814ND
2017-10-31AE03236ND