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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Trico Water Company

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.

 

14

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND50ND
2015ND90ND
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
2014-04-28AD38952ND
2014-04-28AD38954ND
2014-04-28AD38959ND
2014-04-28AD38961ND
2014-04-28AD38963ND
2015-02-18201502200362AMND
2015-02-18201502210060AMND
2015-02-18201502200388AMND
2015-02-18201502200359AMND
2015-02-18201502200416AMND
2015-08-19201508210269AMND
2015-08-19201508210230AMND
2015-08-19201508210249AMND
2015-08-19201508210212AMND