Chloromethane
Minatare, City of
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.
11
Samples
0
Samples exceeding legal limit (MCL)
11
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | 17.7 ppb | 2 | 2 | 16.5 ppb - 18.8 ppb |
| 2019 | 47.3 ppb | 2 | 2 | 43.6 ppb - 50.9 ppb |
| 2020 | 13.4 ppb | 2 | 2 | 12.5 ppb - 14.3 ppb |
| 2021 | 15.2 ppb | 2 | 2 | 13.9 ppb - 16.5 ppb |
| 2022 | 24.9 ppb | 2 | 2 | 24.0 ppb - 25.7 ppb |
| 2023 | 19.9 ppb | 1 | 1 | 19.9 ppb |
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 |
|---|---|---|
| 2018-08-20 | 568526 | 16.5 ppb |
| 2018-08-20 | 568525 | 18.8 ppb |
| 2019-08-12 | 628434 | 43.6 ppb |
| 2019-08-12 | 628435 | 50.9 ppb |
| 2020-08-17 | 689901 | 14.3 ppb |
| 2020-08-17 | 689900 | 12.5 ppb |
| 2021-08-16 | 753790 | 13.9 ppb |
| 2021-08-16 | 753791 | 16.5 ppb |
| 2022-08-08 | 816168 | 24.0 ppb |
| 2022-08-08 | 816167 | 25.7 ppb |
| 2023-08-14 | 880251 | 19.9 ppb |