Chloromethane
Susan Circle Community Ws
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.
6
Samples
0
Samples exceeding legal limit (MCL)
5
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | 11.0 ppb | 1 | 1 | 11.0 ppb |
| 2019 | 11.0 ppb | 1 | 1 | 11.0 ppb |
| 2020 | 6.20 ppb | 1 | 1 | 6.20 ppb |
| 2021 | ND | 1 | 0 | ND |
| 2022 | 3.70 ppb | 1 | 1 | 3.70 ppb |
| 2023 | 8.20 ppb | 1 | 1 | 8.20 ppb |
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 |
|---|---|---|
| 2018-11-28 | AE47197 | 11.0 ppb |
| 2019-12-05 | AE91441 | 11.0 ppb |
| 2020-12-15 | AF37689 | 6.20 ppb |
| 2021-12-14 | AF78712 | ND |
| 2022-12-13 | AG21673 | 3.70 ppb |
| 2023-12-19 | AG66998 | 8.20 ppb |