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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

United Wappinger Water Improvement District

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

 

37

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND120ND
2015N/A00N/A
2016ND80ND
2017ND50ND
2018ND30ND
2019ND90ND

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
2014-06-232014550003ND
2014-06-232014550008ND
2014-12-0912101427KND
2014-12-0912101426VND
2014-12-0912101426KND
2014-12-0912101426GND
2014-12-0912101426HND
2014-12-0912101426PND
2014-12-0912101427RND
2014-12-0912101427FND
2014-12-152045199003ND
2014-12-152045199008ND
2016-11-29UW164137ND
2016-11-29UW164145ND
2016-11-29UW164139ND
2016-11-29UW164143ND
2016-11-30UW164253FND
2016-11-30UW164251FND
2016-11-30UW164252FND
2016-11-30UW164254FND
2017-11-28UW172961FND
2017-11-28UW172963FND
2017-11-28UW172959FND
2017-11-28UW172962FND
2017-11-28UW172958FND
2018-01-03UW180048FND
2018-12-1118L0513-05FND
2018-12-1218L0588-01FND
2019-09-03UW192173-FND
2019-09-03UW192172FND
2019-12-0919L0336-03ND
2019-12-0919L0336-02ND
2019-12-0919L0336-01FND
2019-12-0919L0336-05ND
2019-12-0919L0336-04ND
2019-12-1119L0468-02FND
2019-12-1119L0468-01FND