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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Connecticut Correctional Institute

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.

 

24

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND60ND
2015ND60ND
2016ND60ND
2017ND10ND
2018ND10ND
2019ND40ND

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
2014-01-22E401E00-1VOCND
2014-04-10E404A54-1VOCND
2014-04-10E404A55-1VOCND
2014-04-10E404A56-1VOCND
2014-07-29E407R37-1VOCND
2014-11-13E411B77-1VOCND
2015-01-06E501419-1VOCND
2015-04-17E504G26-1VOCND
2015-04-17E504G26-2VOCND
2015-06-25E506V53-1VOCND
2015-07-22E507Q36-1VOCND
2015-10-21E510L65-1VOCND
2016-02-17E602G94-1VOCND
2016-04-12E604D17-1VOCND
2016-04-26E604R65-1VOCND
2016-05-17E605K81-1VOCND
2016-07-19E607J77-1VOCND
2016-10-11E610C40-1VOCND
2017-02-07E702627-1VOCND
2018-01-16308608GEND
2019-01-22CC32920ND
2019-01-29CC35679ND
2019-01-29CC35682ND
2019-12-10330471GEND