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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

City of Tracy

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

 

59

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND200ND
2015ND120ND
2016ND80ND
2017ND90ND
2018ND90ND
2019ND10ND

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
2014-04-289590-008-1408ND
2014-05-299590-008-0949ND
2014-06-169590-003-0802ND
2014-06-169590-005-0732ND
2014-06-169590-006-0745ND
2014-06-169590-008-0831ND
2014-06-179590-018-0817ND
2014-06-179590-034-0733ND
2014-06-179590-030-0756ND
2014-06-199590-008-1105ND
2014-08-069590-008-1044ND
2014-09-049590-004-0737ND
2014-10-309590-008-1325ND
2014-11-06201411070277AMND
2014-11-06201411070279AMND
2014-11-13201411150147AMND
2014-11-13201411140437AMND
2014-11-13201411140830AMND
2014-11-20201411210468AMND
2014-11-20201411210460AMND
2015-02-25201502260352AMND
2015-05-06201505070543AMND
2015-05-06201505070461AMND
2015-05-06201505070652AMND
2015-05-06201505070434AMND
2015-05-18201505190491AMND
2015-05-18201505190489AMND
2015-05-27201505280389AMND
2015-06-109590-008-1040ND
2015-08-249590-008-1222ND
2015-08-27201508280291AMND
2015-08-27201508280260AMND
2016-06-299590-032-0820ND
2016-06-299590-018-0750ND
2016-07-209590-008-1000ND
2016-08-049590-003-0706ND
2016-08-049590-004-0651ND
2016-08-049590-006-0725ND
2016-09-149590-034-0812ND
2016-09-229590-005-0825ND
2017-03-089590-030-1230ND
2017-06-289590-008-1158ND
2017-06-289590-018-0714ND
2017-06-289590-032-0814ND
2017-06-289590-034-0742ND
2017-09-149590-003-0749ND
2017-09-149590-006-0824ND
2017-09-149590-004-0738ND
2017-09-149590-005-0814ND
2018-06-069590-018-0657ND
2018-06-069590-032-0750ND
2018-06-079590-003-0753ND
2018-06-079590-004-0741ND
2018-06-139590-034-0856ND
2018-06-219590-034-0747ND
2018-07-119590-005-0825ND
2018-07-119590-006-0758ND
2018-07-119590-008-0832ND
2019-06-049590-008-1025ND