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EWG's Tap Water Database — 2019 UPDATE

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Chloromethane

Whittier Water Department

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.

 

89

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND60ND
2013ND180ND
2014ND190ND
2015ND170ND
2016ND120ND
2017ND170ND

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
2012-05-099588-003-0830ND
2012-05-099588-009-0830ND
2012-06-209588-008-0950ND
2012-06-209588-010-1000ND
2012-06-209588-011-0920ND
2012-09-059588-013-1130ND
2013-01-159588-022-1000ND
2013-02-199588-022-0800ND
2013-03-199588-022-1100ND
2013-04-169588-022-0830ND
2013-05-079588-022-1000ND
2013-05-149588-009-1030ND
2013-05-149588-003-1000ND
2013-06-259588-011-0925ND
2013-06-259588-008-0935ND
2013-06-259588-010-0945ND
2013-07-249588-022-0730ND
2013-08-079588-022-0830ND
2013-09-179588-013-1040ND
2013-09-189588-022-0830ND
2013-10-099588-022-1030ND
2013-11-069588-022-0830ND
2013-11-253K25016-01AND
2013-12-049588-022-1030ND
2014-01-079588-022-1000ND
2014-02-119588-022-0830ND
2014-03-119588-022-1100ND
2014-04-099588-022-1000ND
2014-05-209588-022-0830ND
2014-05-214E21030-01AND
2014-05-289588-003-0900ND
2014-05-289588-009-1000ND
2014-06-109588-022-1000ND
2014-06-119588-008-0910ND
2014-06-119588-011-0950ND
2014-06-119588-010-0920ND
2014-07-089588-022-0900ND
2014-08-079588-022-1000ND
2014-09-049588-013-1000ND
2014-09-179588-022-0900ND
2014-10-169588-022-0930ND
2014-11-109588-022-0830ND
2014-12-179588-022-0900ND
2015-01-149588-022-0830ND
2015-02-099588-022-1000ND
2015-03-109588-022-0800ND
2015-04-159588-022-0820ND
2015-05-069588-022-0830ND
2015-05-199588-009-0800ND
2015-06-109588-011-1000ND
2015-06-109588-010-1010ND
2015-06-109588-008-0950ND
2015-06-249588-022-0930ND
2015-07-149588-022-0800ND
2015-08-119588-022-0850ND
2015-09-109588-013-0930ND
2015-09-169588-022-1000ND
2015-10-199588-022-0800ND
2015-11-109588-022-0830ND
2015-12-029588-022-0900ND
2016-01-139588-022-0930ND
2016-02-099588-022-0800ND
2016-03-089588-022-1117ND
2016-05-119588-009-0845ND
2016-06-149588-008-0920ND
2016-06-149588-010-0925ND
2016-06-149588-011-0930ND
2016-09-139588-013-0935ND
2016-09-209588-022-1000ND
2016-10-109588-022-0905ND
2016-11-219588-022-0942ND
2016-12-069588-022-0830ND
2017-01-249588-022-1236ND
2017-02-149588-022-1040ND
2017-03-139588-022-0945ND
2017-04-119588-022-1038ND
2017-05-019588-022-0845ND
2017-05-099588-009-0842ND
2017-06-069588-022-0730ND
2017-06-149588-008-0910ND
2017-06-149588-011-0955ND
2017-06-149588-010-0905ND
2017-07-179588-022-0820ND
2017-08-159588-022-0740ND
2017-09-129588-013-0925ND
2017-09-189588-022-0822ND
2017-10-169588-022-0811ND
2017-11-069588-022-0750ND
2017-12-059588-022-0807ND