Know Your Environment. Protect Your Health.

Chloromethane

Orfordville Waterworks

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
2018ND20ND
2019ND20ND
2020ND30ND
2021ND10ND
2022ND40ND
2023ND20ND

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
2018-03-28373260001ND
2018-08-21402279001ND
2019-07-25459720001ND
2019-09-19471338001ND
2020-08-17520103001ND
2020-08-17520103002ND
2020-08-17520104001ND
2021-09-20584410001ND
2022-03-10609139001ND
2022-06-27627244001ND
2022-09-27645090001ND
2022-09-27645083001ND
2023-08-24696786001ND
2023-09-22702180001ND