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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

City of Mesa

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

 

61

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND570ND
2014ND30ND
2015ND10ND
2016N/A00N/A
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
2013-01-15201301160554AMND
2013-01-16201301160564AMND
2013-01-16201301160566AMND
2013-01-16201301160562AMND
2013-01-22201301240152AMND
2013-01-22201301240172AMND
2013-01-23201301240185AMND
2013-02-12201302140544AMND
2013-02-12201302140542AMND
2013-02-12201302140546AMND
2013-02-13201302140529AMND
2013-02-13201302140533AMND
2013-02-13201302140531AMND
2013-02-13201302140535AMND
2013-04-09201304100477AMND
2013-04-09201304100479AMND
2013-04-09201304100481AMND
2013-04-10201304110544AMND
2013-04-10201304110542AMND
2013-04-10201304110540AMND
2013-04-10201304110546AMND
2013-04-17201304170695AMND
2013-05-09201305100042AMND
2013-05-09201305100046AMND
2013-05-09201305100044AMND
2013-05-09201305100038AMND
2013-05-09201305100040AMND
2013-05-20201305200127AMND
2013-05-20201305200068AMND
2013-07-16201307170510AMND
2013-07-16201307170506AMND
2013-07-16201307170504AMND
2013-07-16201307170508AMND
2013-07-17201307170518AMND
2013-07-17201307170516AMND
2013-07-17201307170520AMND
2013-07-23201307240531AMND
2013-07-24201307240544AMND
2013-08-06201308070586AMND
2013-08-06201308070588AMND
2013-08-06201308070584AMND
2013-08-07201308070590AMND
2013-08-14201308140394AMND
2013-08-14201308140392AMND
2013-10-08201310080614AMND
2013-10-08201310080616AMND
2013-10-08201310080612AMND
2013-10-08201310080610AMND
2013-10-09201310090513AMND
2013-10-09201310090511AMND
2013-10-15201310150503AMND
2013-11-05201311050401AMND
2013-11-05201311050403AMND
2013-11-06201311070300AMND
2013-11-06201311070296AMND
2013-11-06201311070298AMND
2013-11-06201311070294AMND
2014-03-25201403250419AMND
2014-06-04201406040576AMND
2014-09-02201409020217AMND
2015-01-21201501220204AMND