Chloromethane
Pasco Water 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.
9
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 | N/A | 0 | 0 | N/A |
| 2019 | N/A | 0 | 0 | N/A |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | ND | 1 | 0 | ND |
| 2023 | N/A | 0 | 0 | N/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 |
|---|---|---|
| 2013-02-13 | WA97-SE1-13-02592-6058 | ND |
| 2013-02-13 | WA97-SE1-13-02593-6059 | ND |
| 2013-05-15 | WA97-SE2-13-08414-19444 | ND |
| 2013-05-15 | WA97-SE2-13-08414-19443 | ND |
| 2013-08-13 | WA97-SE3-13-15009-34226 | ND |
| 2013-08-13 | WA97-SE1-13-15009-34225 | ND |
| 2013-11-12 | WA97-SE4-13-21552-48916 | ND |
| 2013-11-12 | WA97-SE4-13-21552-48915 | ND |
| 2022-07-18 | 4325357 | ND |