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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Liberty Utilities - Bellflower - Norwalk

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

 

50

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND100ND
2014ND60ND
2015ND40ND
2016ND50ND
2017ND70ND
2018ND80ND
2019ND100ND

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
2013-05-21201305210285AMND
2013-05-21201305210340AMND
2013-05-21201305210279AMND
2013-05-21201305210287AMND
2013-05-21201305210281AMND
2013-08-28201308280512AMND
2013-11-21201311220253AMND
2013-11-21201311220250AMND
2013-11-21201311220265AMND
2013-11-21201311220242AMND
2014-02-13201402130468AMND
2014-02-13201402130464AMND
2014-04-179588-016-0715ND
2014-04-179588-025-0730ND
2014-04-179588-026-1325ND
2014-04-179588-031-1300ND
2015-04-099588-026-1325ND
2015-04-169588-025-0945ND
2015-05-079588-016-1235ND
2015-05-219588-031-0915ND
2016-05-129588-025-1125ND
2016-05-129588-031-1220ND
2016-05-199588-026-1435ND
2016-12-089588-016-1130ND
2016-12-289469-031-0930ND
2017-02-249588-031-0930ND
2017-04-069588-025-1000ND
2017-04-179588-016-1300ND
2017-04-289588-026-1145ND
2017-05-089588-031-1130ND
2017-08-039588-031-0840ND
2017-12-159588-031-1030ND
2018-02-229588-031-0815ND
2018-04-059588-025-0830ND
2018-04-099588-016-0800ND
2018-04-099588-026-0730ND
2018-05-119588-031-1110ND
2018-08-169588-031-0800ND
2018-09-139588-026-0945ND
2018-11-089588-031-1150ND
2019-01-089588-031-1340ND
2019-03-129588-016-0910ND
2019-04-109588-025-0000ND
2019-04-109588-016-0930ND
2019-04-109588-026-0000ND
2019-04-109588-031-1315ND
2019-07-029588-016-0900ND
2019-07-029588-031-0955ND
2019-10-089588-016-1120ND
2019-10-089588-031-1156ND