Know Your Environment. Protect Your Health.

Chloromethane

Bayview 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
2019N/A00N/A
2020N/A00N/A
2021ND30ND
20220.0700 ppb41ND - 0.280 ppb
2023ND50ND

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
2018-07-16L7037550-1ND
2018-08-23L7052375-1ND
2021-08-12630-20635-1ND
2021-08-24630-21100-1ND
2021-11-19630-24489-1ND
2022-03-28630-29935-1ND
2022-05-10630-33114-1ND
2022-07-27630-40913-1ND
2022-11-08630-49307-10.280 ppb
2023-02-15630-55638-1ND
2023-05-15630-61145-1ND
2023-07-31630-68133-1ND
2023-08-09630-69049-1ND
2023-11-08630-75543-1ND