Chloromethane
Monson Water System
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.
8
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 | N/A | 0 | 0 | N/A |
| 2019 | ND | 4 | 0 | ND |
| 2020 | ND | 2 | 0 | ND |
| 2021 | ND | 1 | 0 | ND |
| 2022 | N/A | 0 | 0 | N/A |
| 2023 | ND | 1 | 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 |
|---|---|---|
| 2019-03-29 | CA5403212_001_001-201903290920 | ND |
| 2019-06-20 | CA5403212_001_001-201906201220 | ND |
| 2019-09-06 | CA5403212_001_001-201909061145 | ND |
| 2019-12-17 | CA5403212_001_001-201912171420 | ND |
| 2020-03-06 | CA5403212_001_001-202003061310 | ND |
| 2020-06-16 | CA5403212_001_001-202006161330 | ND |
| 2021-09-28 | CA5403212_001_001-202109281115 | ND |
| 2023-09-11 | CA5403212_001_001-202309111230 | ND |