Chloromethane
Dixie Water Association
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)
1
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | ND | 2 | 0 | ND |
| 2019 | ND | 1 | 0 | ND |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | 0.285 ppb | 2 | 1 | ND - 0.570 ppb |
| 2023 | 0.785 ppb | 4 | 1 | ND - 3.14 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 |
|---|---|---|
| 2018-03-13 | ND | |
| 2018-07-10 | ND | |
| 2019-09-10 | ND | |
| 2022-03-24 | 4261621 | ND |
| 2022-08-08 | 4344872 | 0.570 ppb |
| 2023-03-30 | 4437007 | ND |
| 2023-06-18 | 4480379 | ND |
| 2023-08-15 | 4500282 | ND |
| 2023-10-04 | 4524688 | 3.14 ppb |