Chloromethane
City of Tumwater
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.
21
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 |
|---|---|---|---|---|
| 2014 | ND | 6 | 0 | ND |
| 2015 | ND | 6 | 0 | ND |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | ND | 1 | 0 | ND |
| 2019 | ND | 3 | 0 | ND |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | ND | 5 | 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 |
|---|---|---|
| 2014-08-13 | WA97-SE1-14-15517-35910 | ND |
| 2014-08-13 | WA97-SE1-14-15517-35907 | ND |
| 2014-08-13 | WA97-SE1-14-15517-35909 | ND |
| 2014-08-13 | WA97-SE1-14-15517-35908 | ND |
| 2014-08-13 | WA97-SE1-14-15517-35911 | ND |
| 2014-08-20 | WA97-SE1-14-16401-37916 | ND |
| 2015-02-11 | WA97-SE2-15-02700-6361 | ND |
| 2015-02-11 | WA97-SE1-15-02700-6358 | ND |
| 2015-02-11 | WA97-SE2-15-02700-6359 | ND |
| 2015-02-11 | WA97-SE2-15-02700-6360 | ND |
| 2015-02-11 | WA97-SE1-15-02700-6357 | ND |
| 2015-02-11 | WA97-SE1-15-02700-6356 | ND |
| 2018-10-25 | ND | |
| 2019-07-31 | ND | |
| 2019-08-28 | ND | |
| 2019-08-28 | ND | |
| 2022-08-25 | 4359873 | ND |
| 2022-08-25 | 4359876 | ND |
| 2022-08-25 | 4359875 | ND |
| 2022-08-25 | 4359874 | ND |
| 2022-08-25 | 4359872 | ND |