Chloromethane
Redhill 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.
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 | 1 | 0 | ND |
| 2019 | ND | 1 | 0 | ND |
| 2020 | ND | 5 | 0 | ND |
| 2021 | 0.134 ppb | 5 | 1 | ND - 0.670 ppb |
| 2022 | ND | 4 | 0 | ND |
| 2023 | N/A | 0 | 0 | N/A |
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 |
|---|---|---|
| 2020-03-02 | 20064005201 | ND |
| 2020-03-02 | 20064005301 | ND |
| 2020-04-13 | 20107011401 | ND |
| 2020-08-03 | 20219009901 | ND |
| 2020-11-10 | 20317009401 | ND |
| 2021-01-19 | 21021002001 | 0.670 ppb |
| 2021-02-10 | 21043002501 | ND |
| 2021-04-07 | 21098013901 | ND |
| 2021-08-02 | 21217012801 | ND |
| 2021-10-04 | 21280017201 | ND |
| 2022-01-18 | 22020011801 | ND |
| 2022-04-20 | O197197-VOC-1 | ND |
| 2022-07-19 | O199937-VOC-1 | ND |
| 2022-10-18 | O202885-VOC-1 | ND |