Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Chloromethane

City of Watsonville

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

 

55

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND150ND
2015ND260ND
2016N/A00N/A
2017ND140ND
2018N/A00N/A
2019N/A00N/A

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
2014-02-199590-009-1430ND
2014-03-199590-004-0800ND
2014-03-199590-029-0845ND
2014-03-199590-016-0900ND
2014-03-199590-015-0805ND
2014-03-199590-014-0740ND
2014-03-199590-013-0835ND
2014-03-199590-012-0920ND
2014-03-199590-011-1000ND
2014-03-199590-010-0915ND
2014-03-199590-009-1100ND
2014-03-199590-007-0840ND
2014-03-199590-006-0800ND
2014-03-199590-005-0745ND
2014-03-199590-030-0900ND
2015-02-24201502260386AMND
2015-02-24201502260391AMND
2015-02-24201502260395AMND
2015-02-24201502260489AMND
2015-02-24201502260393AMND
2015-02-24201502260491AMND
2015-02-24201502260508AMND
2015-02-24201502260481AMND
2015-02-24201502260467AMND
2015-02-24201502260506AMND
2015-02-24201502260465AMND
2015-02-24201502260483AMND
2015-02-24201502260512AMND
2015-08-10201503040654AMND
2015-08-10201503040651AMND
2015-08-10201503040656AMND
2015-08-10201503040653AMND
2015-08-10201503040657AMND
2015-08-10201503040652AMND
2015-08-10201503040662AMND
2015-08-10201503040663AMND
2015-08-10201503040659AMND
2015-08-10201503040658AMND
2015-08-10201503040655AMND
2015-08-10201503040661AMND
2015-08-10201503040660AMND
2017-03-159590-005-0905ND
2017-03-159590-004-1040ND
2017-03-159590-006-0910ND
2017-03-159590-007-1100ND
2017-03-159590-030-1100ND
2017-03-159590-009-1030ND
2017-03-159590-010-0955ND
2017-03-159590-011-1010ND
2017-03-159590-012-0935ND
2017-03-159590-013-0945ND
2017-03-159590-014-0825ND
2017-03-159590-015-1010ND
2017-03-159590-016-0840ND
2017-03-159590-029-0830ND