Chloromethane
Orfordville Waterworks
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
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | ND | 2 | 0 | ND |
| 2019 | ND | 2 | 0 | ND |
| 2020 | ND | 3 | 0 | ND |
| 2021 | ND | 1 | 0 | ND |
| 2022 | ND | 4 | 0 | ND |
| 2023 | ND | 2 | 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 |
|---|---|---|
| 2018-03-28 | 373260001 | ND |
| 2018-08-21 | 402279001 | ND |
| 2019-07-25 | 459720001 | ND |
| 2019-09-19 | 471338001 | ND |
| 2020-08-17 | 520103001 | ND |
| 2020-08-17 | 520103002 | ND |
| 2020-08-17 | 520104001 | ND |
| 2021-09-20 | 584410001 | ND |
| 2022-03-10 | 609139001 | ND |
| 2022-06-27 | 627244001 | ND |
| 2022-09-27 | 645090001 | ND |
| 2022-09-27 | 645083001 | ND |
| 2023-08-24 | 696786001 | ND |
| 2023-09-22 | 702180001 | ND |