Know Your Environment. Protect Your Health.

Chloromethane

Redhill Water Association

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
2018ND10ND
2019ND10ND
2020ND50ND
20210.134 ppb51ND - 0.670 ppb
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 Lab ID Result
2020-03-0220064005201ND
2020-03-0220064005301ND
2020-04-1320107011401ND
2020-08-0320219009901ND
2020-11-1020317009401ND
2021-01-19210210020010.670 ppb
2021-02-1021043002501ND
2021-04-0721098013901ND
2021-08-0221217012801ND
2021-10-0421280017201ND
2022-01-1822020011801ND
2022-04-20O197197-VOC-1ND
2022-07-19O199937-VOC-1ND
2022-10-18O202885-VOC-1ND