Chloromethane
Lake Forest Utility District
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.
13
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 | 1.20 ppb | 2 | 1 | ND - 2.40 ppb |
| 2019 | ND | 2 | 0 | ND |
| 2020 | 1.000 ppb | 2 | 1 | ND - 2.00 ppb |
| 2021 | ND | 3 | 0 | ND |
| 2022 | ND | 2 | 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 | AE30786 | 2.40 ppb |
| 2018-06-19 | AE30802 | ND |
| 2019-09-05 | AE82290 | ND |
| 2019-09-05 | AE82304 | ND |
| 2020-10-26 | AF31920 | ND |
| 2020-10-26 | AF31928 | 2.00 ppb |
| 2021-03-08 | AF45706 | ND |
| 2021-03-08 | AF45708 | ND |
| 2021-04-19 | AF50507 | ND |
| 2022-07-21 | AG05779 | ND |
| 2022-12-12 | AG21502 | ND |
| 2023-08-23 | AG53719 | ND |
| 2023-08-23 | AG53721 | ND |