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EWG's Tap Water Database — 2019 UPDATE

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Chloromethane

City of Caldwell

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.

 

26

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013N/A00N/A
2014ND130ND
2015ND130ND
2016N/A00N/A
2017N/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
2014-11-24141201001-012ND
2014-11-24141201004-008ND
2014-11-24141201004-007ND
2014-11-24141201001-008ND
2014-11-24141201001-009ND
2014-11-24141201004-010ND
2014-11-24141201001-011ND
2014-11-24141201001-007ND
2014-11-24141201001-010ND
2014-11-25141201004-006ND
2014-11-25141201004-011ND
2014-11-25141201004-009ND
2014-12-01141202018-003ND
2015-05-26150528035-003ND
2015-05-26150528035-001ND
2015-05-26150528035-002ND
2015-05-26150528035-008ND
2015-05-26150528035-005ND
2015-05-27150528035-004ND
2015-05-27150528035-010ND
2015-05-27150528035-009ND
2015-05-27150528035-006ND
2015-05-27150528035-007ND
2015-05-28150529019-001ND
2015-05-28150529019-002ND
2015-05-28150529019-003ND