Chloromethane
Dorchester, Village of
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.
13
Samples
0
Samples exceeding legal limit (MCL)
0
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | ND | 1 | 0 | ND |
| 2019 | ND | 1 | 0 | ND |
| 2020 | ND | 3 | 0 | ND |
| 2021 | ND | 1 | 0 | ND |
| 2022 | ND | 2 | 0 | ND |
| 2023 | ND | 5 | 0 | ND |
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 |
|---|---|---|
| 2018-07-16 | 560158 | ND |
| 2019-07-15 | 621241 | ND |
| 2020-05-26 | 667014 | ND |
| 2020-09-14 | 684285 | ND |
| 2020-09-28 | 701100 | ND |
| 2021-07-19 | 745978 | ND |
| 2022-07-05 | 809302 | ND |
| 2022-07-27 | 818275 | ND |
| 2023-01-17 | 842469 | ND |
| 2023-04-24 | 855387 | ND |
| 2023-05-15 | 855924 | ND |
| 2023-07-17 | 873260 | ND |
| 2023-10-16 | 891653 | ND |