Chloromethane
City of Olympia
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.
18
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 | 16 | 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 | ND | 2 | 0 | ND |
| 2022 | N/A | 0 | 0 | N/A |
| 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 |
|---|---|---|
| 2013-02-14 | WA97-SE1-13-02624-6123 | ND |
| 2013-05-20 | WA97-SE1-13-08686-20033 | ND |
| 2013-05-20 | WA97-SE1-13-08686-20032 | ND |
| 2013-05-20 | WA97-SE1-13-08686-20030 | ND |
| 2013-05-20 | WA97-SE1-13-08686-20031 | ND |
| 2013-05-20 | WA97-SE1-13-08686-20035 | ND |
| 2013-05-20 | WA97-SE1-13-08686-20034 | ND |
| 2013-05-20 | WA97-SE2-13-08686-20029 | ND |
| 2013-08-05 | WA97-SE3-13-14093-32129 | ND |
| 2013-11-13 | WA97-SE2-13-21665-49257 | ND |
| 2013-11-13 | WA97-SE2-13-21665-49256 | ND |
| 2013-11-13 | WA97-SE4-13-21665-49255 | ND |
| 2013-11-13 | WA97-SE2-13-21665-49258 | ND |
| 2013-11-13 | WA97-SE2-13-21665-49261 | ND |
| 2013-11-13 | WA97-SE2-13-21665-49259 | ND |
| 2013-11-13 | WA97-SE2-13-21665-49260 | ND |
| 2021-03-29 | 4095904 | ND |
| 2021-05-04 | 4112960 | ND |