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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Aquarion Water Company of Connecticut - Main System

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.

 

44

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND80ND
2014ND110ND
2015ND50ND
2016ND50ND
2017ND50ND
2018ND50ND
2019ND50ND

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
2013-07-15201307160480AMND
2013-07-15201307160499AMND
2013-07-15201307160452AMND
2013-07-17201307180789AMND
2013-07-17201307180551AMND
2013-10-07201310080165AMND
2013-10-07201310080217AMND
2013-10-07201310080207AMND
2014-01-06201401070102AMND
2014-01-06201401070142AMND
2014-01-06201401070140AMND
2014-02-03201401629-VOC1ND
2014-02-03201401617-VOC1ND
2014-02-03201401645-VOC1ND
2014-04-01201404020545AMND
2014-04-01201404020551AMND
2014-04-01201404020493AMND
2014-06-18201408445-VOC1ND
2014-06-18201408451-VOC1ND
2015-02-03201501491-VOC1ND
2015-02-03201501531-VOC1ND
2015-02-03201501519-VOC1ND
2015-07-08201508846-VOC1ND
2015-07-08201508843-VOC1ND
2016-02-01201601487-VOC1ND
2016-02-01201601447-VOC1ND
2016-02-01201601433-VOC1ND
2016-07-05201608405-VOC1ND
2016-07-05201608402-VOC1ND
2017-02-06201701995-VOC1ND
2017-02-06201701980-VOC1ND
2017-02-06201701966-VOC1ND
2017-07-06201710080-VOC1ND
2017-07-06201710084-VOC1ND
2018-02-05201801586-VOC1ND
2018-02-05201801570-VOC1ND
2018-02-05201801604-VOC1ND
2018-07-05201809658-VOC1ND
2018-07-05201809662-VOC1ND
2019-02-04201901613-VOC1ND
2019-02-04201901581-VOC1ND
2019-02-04201901554-VOC1ND
2019-07-01201909695-VOC1ND
2019-07-01201909693-VOC1ND