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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

City of Redding

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

 

45

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND190ND
2014ND130ND
2015ND20ND
2016ND40ND
2017N/A00N/A
2018ND10ND
2019ND60ND

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
2013-06-172844714ND
2013-06-172844341ND
2013-06-172844332ND
2013-06-172844873ND
2013-06-172844833ND
2013-06-172844842ND
2013-06-172844723ND
2013-06-172844855ND
2013-06-172844317ND
2013-06-172844699ND
2013-06-272850072ND
2013-06-272850064ND
2013-06-272850068ND
2013-09-122896102ND
2013-09-122896049ND
2013-12-062941953ND
2013-12-062941971ND
2013-12-062941962ND
2013-12-062941993ND
2014-03-202996218ND
2014-03-202996240ND
2014-03-202995966ND
2014-03-202995709ND
2014-03-202995792ND
2014-03-202995848ND
2014-06-123044618ND
2014-06-123044450ND
2014-06-123044479ND
2014-06-123044546ND
2014-06-123044493ND
2014-06-123044826ND
2014-08-211677-066-1026ND
2015-05-181677-022-1315ND
2015-07-061677-022-1020ND
2016-07-131677-012-1000ND
2016-07-131677-010-0940ND
2016-07-131677-006-0933ND
2016-08-021677-072-0840ND
2018-07-021677-073-1150ND
2019-07-221677-025-1350ND
2019-07-221677-024-1150ND
2019-07-221677-023-1100ND
2019-07-221677-018-1340ND
2019-07-221677-009-1300ND
2019-07-221677-005-1215ND