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EWG's Tap Water Database — 2019 UPDATE

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Chloromethane

City of Puyallup

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.

 

25

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
2014ND60ND
2015ND180ND
2016N/A00N/A
2017ND10ND

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
2014-07-0873733ND
2014-07-0873731ND
2014-07-0873732ND
2014-07-0973750ND
2014-07-0973752ND
2014-07-0973751ND
2015-02-03201502050875AMND
2015-02-03201502050731AMND
2015-02-03201502050764AMND
2015-02-03201502050842AMND
2015-02-03201502050880AMND
2015-02-03201502050883AMND
2015-02-03201502050905AMND
2015-02-03201502050727AMND
2015-05-05201505070577AMND
2015-08-06201508070151AMND
2015-08-06201508110453AMND
2015-08-06201508070198AMND
2015-08-06201508070195AMND
2015-08-06201508070125AMND
2015-08-06201508070201AMND
2015-08-06201508070106AMND
2015-08-06201508070135AMND
2015-11-17201511180474AMND
2017-12-28ND