Know Your Environment. Protect Your Health.

Chloromethane

Grand Harbor Water System

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
2020ND20ND
2021ND20ND
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
2018-06-19AE30463ND
2018-06-19AE30487ND
2019-06-13AE70599ND
2019-06-13AE70603ND
2020-07-16AF19727ND
2020-07-16AF19731ND
2021-08-04AF64809ND
2021-08-04AF64813ND
2022-03-08AF88096ND
2022-03-08AF88116ND
2022-06-01AF99089ND
2022-09-29AG15480ND
2023-08-09AG51989ND
2023-08-09AG51991ND