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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Middletown Water Department

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.

 

96

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND10ND
2014ND90ND
2015ND180ND
2016ND180ND
2017ND160ND
2018ND160ND
2019ND180ND

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
2013-09-232901917ND
2014-03-192994606ND
2014-09-22S588892ND
2014-09-22S588891ND
2014-09-22S588890ND
2014-09-22S588889ND
2014-12-30S612306ND
2014-12-30S612305ND
2014-12-30S612307ND
2014-12-30S612308ND
2015-02-243194572ND
2015-03-31S614672ND
2015-03-31S614671ND
2015-03-31S614670ND
2015-03-31S614669ND
2015-06-30S637157ND
2015-06-30S637156ND
2015-06-30S637155ND
2015-06-30S637154ND
2015-07-133278615ND
2015-09-30S637283ND
2015-09-30S637284ND
2015-09-30S637286ND
2015-09-30S637285ND
2015-12-21S628973ND
2015-12-21S628972ND
2015-12-21S628971ND
2015-12-21S628970ND
2016-03-31S677083ND
2016-03-31S677082ND
2016-03-31S677081ND
2016-03-31S677080ND
2016-06-29S679278ND
2016-06-29S679277ND
2016-06-29S679279ND
2016-06-29S679280ND
2016-09-29S694851ND
2016-09-29S694850ND
2016-09-29S694849ND
2016-09-29S694842ND
2016-10-11S719486ND
2016-10-11S719485ND
2016-12-14S719733ND
2016-12-14S719732ND
2016-12-14S719731ND
2016-12-14S719730ND
2017-03-30S684434ND
2017-03-30S720624ND
2017-03-30S684433ND
2017-03-30S684432ND
2017-06-28S738590ND
2017-06-28S738589ND
2017-06-28S738588ND
2017-06-28S738587ND
2017-09-27S760223ND
2017-09-27S760221ND
2017-09-27S760218ND
2017-09-27S760217ND
2017-12-19S782084ND
2017-12-19S782080ND
2017-12-19S782082ND
2017-12-19S782086ND
2018-03-26S792135ND
2018-03-26S792133ND
2018-03-26S792131ND
2018-03-26S792129ND
2018-06-26S808454ND
2018-06-26S808452ND
2018-06-26S808450ND
2018-06-26S808448ND
2018-09-26S824424ND
2018-09-26S808646ND
2018-09-26S808648ND
2018-09-26S824426ND
2018-12-17S854835ND
2018-12-17S854833ND
2018-12-17S854831ND
2018-12-17S854829ND
2019-03-28S870609ND
2019-03-28S870607ND
2019-03-28S870605ND
2019-03-28S870603ND
2019-06-27S893161ND
2019-06-27S893157ND
2019-06-27S893159ND
2019-06-27S893163ND
2019-09-30S909303ND
2019-09-30S909299ND
2019-09-30S909297ND
2019-09-30S909255ND
2019-10-10S920200ND
2019-10-10S920198ND
2019-12-09S927516ND
2019-12-09S927528ND
2019-12-09S927524ND
2019-12-09S927520ND