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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Hilton Head PSD 1

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

 

23

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20130.0400 ppb152ND - 0.390 ppb
2014ND10ND
2015ND70ND
2016N/A00N/A
2017N/A00N/A
2018N/A00N/A
2019N/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
2013-05-06201305080484AMND
2013-05-06201305080513AMND
2013-05-06201305080492AMND
2013-05-06201305080461AMND
2013-05-06201305080329AMND
2013-05-06201305080495AMND
2013-05-06201305080359AMND
2013-08-05201308070416AMND
2013-11-04201311060560AMND
2013-11-04201311060562AM0.210 ppb
2013-11-04201311060556AMND
2013-11-04201311060568AMND
2013-11-04201311060558AMND
2013-11-04201311060564AM0.390 ppb
2013-11-05201311060554AMND
2014-02-03201402050138AMND
2015-03-09AD52649ND
2015-03-09AD52660ND
2015-03-09AD52658ND
2015-03-09AD52656ND
2015-03-09AD52655ND
2015-03-09AD52652ND
2015-03-09AD52650ND