Chloromethane
City of Sunnyside
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.
17
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 | 0.0774 ppb | 10 | 2 | ND - 0.473 ppb |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | ND | 1 | 0 | ND |
| 2019 | ND | 1 | 0 | ND |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | ND | 3 | 0 | ND |
| 2022 | ND | 2 | 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 |
|---|---|---|
| 2014-03-31 | WA97-SE1-14-05465-13407 | 0.473 ppb |
| 2014-03-31 | WA97-SE1-14-05465-13408 | ND |
| 2014-03-31 | WA97-SE1-14-05465-13406 | ND |
| 2014-03-31 | WA97-SE1-14-05465-13410 | ND |
| 2014-03-31 | WA97-SE1-14-05465-13409 | ND |
| 2014-09-03 | WA97-SE2-14-17266-39554 | ND |
| 2014-09-03 | WA97-SE2-14-17266-39553 | ND |
| 2014-09-03 | WA97-SE2-14-17266-39553A | 0.301 ppb |
| 2014-09-03 | WA97-SE2-14-17266-39555 | ND |
| 2014-09-03 | WA97-SE2-14-17795-40724 | ND |
| 2018-10-03 | ND | |
| 2019-07-02 | ND | |
| 2021-03-09 | 4087470 | ND |
| 2021-05-12 | 4118792 | ND |
| 2021-05-12 | 4118806 | ND |
| 2022-07-21 | 4325368 | ND |
| 2022-07-21 | 4325371 | ND |