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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Valencia 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.

MORE ABOUT THIS CONTAMINANT

 

155

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND40ND
2014ND500ND
2015ND210ND
2016ND220ND
2017ND220ND
2018ND140ND
2019ND220ND

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
2013-02-27201303010058AMND
2013-05-15201305160535AMND
2013-08-23201308290470AMND
2013-11-11201311150009AMND
2014-02-269590-048-0915ND
2014-03-05201403050959AMND
2014-03-05201403050961AMND
2014-03-12201403120917AMND
2014-03-12201403120915AMND
2014-03-12201403120928AMND
2014-04-09201404100450AMND
2014-04-16201404180187AMND
2014-04-16201404180191AMND
2014-04-16201404180193AMND
2014-04-16201404180189AMND
2014-04-16201404180185AMND
2014-04-23201404230714AMND
2014-05-14201405141013AMND
2014-05-289590-048-0915ND
2014-06-11201406120233AMND
2014-06-25201406250428AMND
2014-08-289590-048-0940ND
2014-09-04201409040734AMND
2014-09-04201409040736AMND
2014-09-04201409040732AMND
2014-10-09201410090959AMND
2014-10-10201410160742AMND
2014-10-10201410160744AMND
2014-10-10201410160738AMND
2014-11-06201411060675AMND
2014-11-089590-021-0830ND
2014-11-089590-024-1135ND
2014-11-089590-052-0930ND
2014-11-089590-062-0815ND
2014-11-139590-005-0950ND
2014-11-139590-017-0940ND
2014-11-139590-018-0900ND
2014-11-139590-025-1050ND
2014-11-139590-026-0845ND
2014-11-139590-046-1100ND
2014-11-139590-049-0900ND
2014-11-139590-051-1010ND
2014-11-139590-058-0920ND
2014-11-139590-070-1025ND
2014-11-209590-003-1115ND
2014-11-209590-004-0930ND
2014-11-209590-047-1030ND
2014-11-209590-048-1015ND
2014-11-209590-073-0915ND
2014-12-19201412200062AMND
2014-12-19201412200054AMND
2014-12-19201412200058AMND
2014-12-19201412200060AMND
2014-12-19201412200056AMND
2015-02-199590-048-0950ND
2015-06-049590-048-1000ND
2015-08-279590-048-0918ND
2015-11-059590-005-0932ND
2015-11-059590-018-0951ND
2015-11-059590-021-0815ND
2015-11-059590-024-0854ND
2015-11-059590-026-0910ND
2015-11-059590-058-1012ND
2015-11-059590-062-0828ND
2015-11-129590-017-0950ND
2015-11-129590-025-0818ND
2015-11-129590-046-0907ND
2015-11-129590-049-0932ND
2015-11-129590-051-1015ND
2015-11-129590-070-0838ND
2015-11-309590-003-0903ND
2015-11-309590-004-1014ND
2015-11-309590-047-1006ND
2015-11-309590-048-0920ND
2015-11-309590-073-0845ND
2016-02-259590-048-0928ND
2016-03-039590-052-0910ND
2016-05-269590-048-0959ND
2016-11-039590-005-1000ND
2016-11-039590-018-1030ND
2016-11-039590-021-0820ND
2016-11-039590-024-0940ND
2016-11-039590-026-0950ND
2016-11-039590-052-0920ND
2016-11-039590-058-1040ND
2016-11-039590-062-0900ND
2016-11-099590-017-1036ND
2016-11-099590-025-0926ND
2016-11-099590-046-1007ND
2016-11-099590-049-0910ND
2016-11-099590-051-1054ND
2016-11-099590-070-0943ND
2016-11-179590-003-0922ND
2016-11-179590-004-0954ND
2016-11-179590-047-0943ND
2016-11-179590-048-1006ND
2016-11-179590-073-0903ND
2017-02-239590-048-0948ND
2017-08-249590-048-0915ND
2017-10-269590-048-0900ND
2017-11-029590-005-1005ND
2017-11-029590-018-0940ND
2017-11-029590-021-0855ND
2017-11-029590-024-1020ND
2017-11-029590-026-1215ND
2017-11-029590-052-0920ND
2017-11-029590-058-0955ND
2017-11-029590-062-0905ND
2017-11-169590-017-1130ND
2017-11-169590-025-1010ND
2017-11-169590-046-1030ND
2017-11-169590-049-1115ND
2017-11-169590-051-1150ND
2017-11-169590-070-1050ND
2017-11-309590-003-1000ND
2017-11-309590-004-0900ND
2017-11-309590-047-0850ND
2017-11-309590-048-0945ND
2017-11-309590-073-0920ND
2018-11-072104-005-0923ND
2018-11-072104-018-0941ND
2018-11-072104-021-0830ND
2018-11-072104-025-0857ND
2018-11-072104-026-0909ND
2018-11-072104-052-0910ND
2018-11-072104-058-0954ND
2018-11-072104-062-0845ND
2018-11-142104-017-1005ND
2018-11-142104-025-0940ND
2018-11-142104-046-0855ND
2018-11-142104-049-0950ND
2018-11-142104-051-1030ND
2018-11-142104-070-0920ND
2019-02-122104-003-0900ND
2019-02-122104-004-0830ND
2019-02-122104-047-0840ND
2019-02-122104-073-0950ND
2019-11-062104-018-0825ND
2019-11-062104-021-0926ND
2019-11-062104-026-0900ND
2019-11-062104-052-0840ND
2019-11-062104-058-1000ND
2019-11-062104-062-0908ND
2019-11-142104-017-1100ND
2019-11-142104-025-0935ND
2019-11-142104-046-0840ND
2019-11-142104-049-0915ND
2019-11-142104-051-0940ND
2019-11-142104-070-0920ND
2019-11-202104-003-0900ND
2019-11-202104-004-0940ND
2019-11-202104-047-0920ND
2019-11-202104-073-0930ND
2019-11-219590-048-1120ND
2019-11-252104-005-1030ND