Chloromethane
Medway Water and Sewer Department
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.
42
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 |
|---|---|---|---|---|
| 2013 | ND | 8 | 0 | ND |
| 2014 | N/A | 0 | 0 | N/A |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | ND | 4 | 0 | ND |
| 2019 | ND | 4 | 0 | ND |
| 2020 | ND | 4 | 0 | ND |
| 2021 | ND | 8 | 0 | ND |
| 2022 | ND | 7 | 0 | ND |
| 2023 | ND | 7 | 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 | Result |
|---|---|
| 2013-03-25 | ND |
| 2013-03-25 | ND |
| 2013-03-25 | ND |
| 2013-03-25 | ND |
| 2013-09-16 | ND |
| 2013-09-16 | ND |
| 2013-09-16 | ND |
| 2013-09-16 | ND |
| 2018-05-08 | ND |
| 2018-05-08 | ND |
| 2018-05-08 | ND |
| 2018-06-25 | ND |
| 2019-05-07 | ND |
| 2019-05-07 | ND |
| 2019-05-07 | ND |
| 2019-05-07 | ND |
| 2020-06-16 | ND |
| 2020-06-16 | ND |
| 2020-06-16 | ND |
| 2020-06-16 | ND |
| 2021-04-27 | ND |
| 2021-04-27 | ND |
| 2021-04-27 | ND |
| 2021-04-27 | ND |
| 2021-04-27 | ND |
| 2021-04-27 | ND |
| 2021-08-11 | ND |
| 2021-10-25 | ND |
| 2022-01-05 | ND |
| 2022-04-20 | ND |
| 2022-04-20 | ND |
| 2022-04-20 | ND |
| 2022-04-20 | ND |
| 2022-04-20 | ND |
| 2022-04-20 | ND |
| 2023-04-19 | ND |
| 2023-04-19 | ND |
| 2023-04-19 | ND |
| 2023-04-19 | ND |
| 2023-04-19 | ND |
| 2023-04-19 | ND |
| 2023-04-19 | ND |