Know Your Environment. Protect Your Health.

Chloromethane

City of Tacoma

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.

 

40

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND10ND
2015ND200ND
2016N/A00N/A
2017N/A00N/A
2018ND30ND
2019ND30ND
2020N/A00N/A
2021ND50ND
2022ND50ND
2023ND30ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

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
2014-08-06201408070493AMND
2015-03-10201503110935AMND
2015-03-10201502170548AMND
2015-03-10201503120179AMND
2015-06-09201505060001AMND
2015-06-17201505060005AMND
2015-06-29201505020034AMND
2015-07-06201505020035AMND
2015-07-08201507090318AMND
2015-07-09201507100395AMND
2015-07-09201506300092AMND
2015-08-24201508250628AMND
2015-09-09201508050013AMND
2015-09-09201508050009AMND
2015-10-13201509250020AMND
2015-12-01201511130086AMND
2015-12-02201511130082AMND
2015-12-07201511130099AMND
2015-12-07201511130096AMND
2015-12-08201511130098AMND
2015-12-08201511130097AMND
2018-02-07ND
2018-03-12ND
2018-03-19ND
2019-01-02ND
2019-07-24ND
2019-12-03ND
2021-06-214137308ND
2021-06-214137307ND
2021-06-214137309ND
2021-06-214233773ND
2021-06-304142811ND
2022-09-154368469ND
2022-09-234368470ND
2022-10-114363364ND
2022-11-154428454ND
2022-11-164388597ND
2023-06-204542958ND
2023-07-124542959ND
2023-07-124542960ND