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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Hazardville Water Company

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.

 

46

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND100ND
2015ND110ND
2016ND50ND
2017ND90ND
2018ND60ND
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
2014-01-27SB83819-04-VOCND
2014-04-21SB87957-13-VOCND
2014-04-21SB87957-14-VOCND
2014-06-03SB90449-01-VOCND
2014-06-03SB90449-02-VOCND
2014-06-03SB90449-03-VOCND
2014-06-03SB90449-04-VOCND
2014-06-03SB90449-05-VOCND
2014-07-07SB92334-09-VOCND
2014-10-14SB97999-04-VOCND
2015-01-2146088 012015ND
2015-01-2138661 012015ND
2015-01-2146091 012015ND
2015-01-2146090 012015ND
2015-01-2146094 012015ND
2015-01-2146093 012015ND
2015-02-11SC03254-05-VOCND
2015-04-21SC06241-06-VOCND
2015-07-15SC10036-04-VOCND
2015-09-08SC12125-03-VOCND
2015-10-20SC13895-08-VOCND
2016-01-25SC17491-09-VOCND
2016-04-18SC20279-09-VOCND
2016-07-21SC23917-03-VOCND
2016-07-21SC23917-02-VOCND
2016-10-24SC27464-08-VOCND
2017-01-09SC30330-15-VOCND
2017-04-04BX98286VOC1ND
2017-06-26BY48752VOC1ND
2017-06-26BY48750VOC1ND
2017-06-27BY48749VOC1ND
2017-06-27BY48754VOC1ND
2017-06-27BY48751VOC1ND
2017-07-25BY72105VOC1ND
2017-10-17BZ22379VOC1ND
2018-01-03BZ68303VOC1ND
2018-04-03CA12985VOC1ND
2018-07-02CA82194ND
2018-07-02CA82195ND
2018-07-02CA82195VOC1ND
2018-10-10CB69247ND
2019-01-07CC25226ND
2019-04-02CC79783ND
2019-07-09CD52639ND
2019-07-09CD52640ND
2019-10-08CE28924ND