Chloromethane
Grand Harbor 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.
14
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 | ND | 2 | 0 | ND |
| 2019 | ND | 2 | 0 | ND |
| 2020 | ND | 2 | 0 | ND |
| 2021 | ND | 2 | 0 | ND |
| 2022 | ND | 4 | 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 |
|---|---|---|
| 2018-06-19 | AE30463 | ND |
| 2018-06-19 | AE30487 | ND |
| 2019-06-13 | AE70599 | ND |
| 2019-06-13 | AE70603 | ND |
| 2020-07-16 | AF19727 | ND |
| 2020-07-16 | AF19731 | ND |
| 2021-08-04 | AF64809 | ND |
| 2021-08-04 | AF64813 | ND |
| 2022-03-08 | AF88096 | ND |
| 2022-03-08 | AF88116 | ND |
| 2022-06-01 | AF99089 | ND |
| 2022-09-29 | AG15480 | ND |
| 2023-08-09 | AG51989 | ND |
| 2023-08-09 | AG51991 | ND |