Chloromethane
Villager Apartments
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.
6
Samples
0
Samples exceeding legal limit (MCL)
3
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | 0.890 ppb | 1 | 1 | 0.890 ppb |
| 2019 | 1.80 ppb | 1 | 1 | 1.80 ppb |
| 2020 | 4.51 ppb | 1 | 1 | 4.51 ppb |
| 2021 | 4.70 ppb | 1 | 1 | 4.70 ppb |
| 2022 | ND | 1 | 0 | ND |
| 2023 | 3.10 ppb | 1 | 1 | 3.10 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 |
|---|---|---|
| 2018-02-26 | 18P002936 | 0.890 ppb |
| 2019-02-05 | EHS1900007468-SR-2OC | 1.80 ppb |
| 2020-03-09 | 20P003769 | 4.51 ppb |
| 2021-03-31 | L2116080-1 | 4.70 ppb |
| 2022-03-16 | EHS2200008607-1POC | ND |
| 2023-03-20 | EHS2300014349-01POC | 3.10 ppb |