Know Your Environment. Protect Your Health.

Chloromethane

Franklin 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.

 

21

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND10ND
20150.233 ppb31ND - 0.700 ppb
2016N/A00N/A
2017N/A00N/A
2018ND10ND
2019ND10ND
2020N/A00N/A
2021ND40ND
2022ND50ND
2023ND60ND

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
2014-11-12ND
2015-02-11ND
2015-05-13ND
2015-08-120.700 ppb
2018-05-09ND
2019-05-15ND
2021-02-03ND
2021-05-05ND
2021-08-04ND
2021-11-03ND
2022-02-02ND
2022-02-02ND
2022-05-04ND
2022-08-03ND
2022-11-02ND
2023-02-01ND
2023-02-01ND
2023-02-01ND
2023-05-03ND
2023-08-03ND
2023-12-12ND