Chloromethane
Wyocena 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.
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 |
|---|---|---|---|---|
| 2018 | 0.260 ppb | 1 | 1 | 0.260 ppb |
| 2019 | 0.320 ppb | 1 | 1 | 0.320 ppb |
| 2020 | 0.330 ppb | 2 | 2 | 0.300 ppb - 0.360 ppb |
| 2021 | 0.250 ppb | 2 | 2 | 0.250 ppb |
| 2022 | ND | 1 | 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 |
|---|---|---|
| 2018-07-02 | 144792 | 0.260 ppb |
| 2019-07-01 | 299607 | 0.320 ppb |
| 2020-04-06 | 405318 | 0.300 ppb |
| 2020-04-06 | 405317 | 0.360 ppb |
| 2021-02-02 | 530745 | 0.250 ppb |
| 2021-02-02 | 530745 | 0.250 ppb |
| 2022-01-25 | 1095340 | ND |
| 2023-01-16 | 1281123 | ND |
| 2023-01-16 | 1281125 | ND |