Know Your Environment. Protect Your Health.

Chloromethane

Johnson City Water Department

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.

 

18

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND60ND
2015ND20ND
2016N/A00N/A
2017N/A00N/A
2018ND20ND
2019ND20ND
2020N/A00N/A
2021ND20ND
2022ND40ND
2023N/A00N/A

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 Result
2014-05-27ND
2014-05-27ND
2014-08-20ND
2014-08-20ND
2014-11-10ND
2014-11-10ND
2015-02-10ND
2015-02-10ND
2018-09-18ND
2018-09-18ND
2019-09-30ND
2019-09-30ND
2021-09-21ND
2021-09-21ND
2022-09-07ND
2022-09-07ND
2022-09-07ND
2022-09-07ND