Menu

EWG's Tap Water Database — 2019 UPDATE

Donate

Chloromethane

City of Nampa

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
2014ND260ND
2015N/A00N/A
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
2014-01-29140131024-010ND
2014-01-29140131024-011ND
2014-01-29140131024-005ND
2014-01-29140131024-006ND
2014-01-29140131024-016ND
2014-01-30140131024-013ND
2014-01-30140131024-007ND
2014-01-30140131024-009ND
2014-01-30140131024-015ND
2014-01-30140131024-017ND
2014-01-30140131024-008ND
2014-01-30140131024-014ND
2014-01-30140131024-012ND
2014-07-21140723034-008ND
2014-07-21140723034-007ND
2014-07-21140723034-013ND
2014-07-21140723034-010ND
2014-07-21140723034-009ND
2014-07-21140723034-011ND
2014-07-21140723034-006ND
2014-07-21140723034-012ND
2014-07-21140723034-005ND
2014-07-21140723034-016ND
2014-07-21140723034-015ND
2014-07-21140723034-014ND
2014-07-21140723034-017ND