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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

City of Riverbank

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

 

31

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND100ND
2014ND100ND
2015ND10ND
2016ND100ND
2017N/A00N/A
2018N/A00N/A
2019N/A00N/A

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
2013-07-24A3G1603-05AND
2013-07-24A3G1603-07AND
2013-07-24A3G1603-01AND
2013-07-24A3G1603-03AND
2013-07-24A3G1603-17AND
2013-07-24A3G1603-15AND
2013-07-24A3G1603-11AND
2013-07-24A3G1603-13AND
2013-07-24A3G1603-09AND
2013-07-29A3G1603-19AND
2014-01-14A4A0434-11AND
2014-01-14A4A0434-19AND
2014-01-14A4A0434-09AND
2014-01-14A4A0434-15AND
2014-01-14A4A0434-17AND
2014-01-15A4A0434-13AND
2014-01-15A4A0434-03AND
2014-01-15A4A0434-05AND
2014-01-15A4A0434-07AND
2014-01-22A4A1423-01AND
2015-11-125810-012-1000ND
2016-10-055810-002-1037ND
2016-10-055810-012-1025ND
2016-10-055810-006-1000ND
2016-10-065810-007-0930ND
2016-10-065810-005-0901ND
2016-10-065810-004-0810ND
2016-10-105810-010-0910ND
2016-10-105810-009-1400ND
2016-10-105810-008-0844ND
2016-10-105810-003-0925ND