Chloromethane
Felsenthal Water and Sewer
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.
19
Samples
0
Samples exceeding legal limit (MCL)
1
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | 0.828 ppb | 4 | 2 | ND - 2.68 ppb |
| 2019 | ND | 3 | 0 | ND |
| 2020 | 0.988 ppb | 4 | 2 | ND - 3.14 ppb |
| 2021 | ND | 4 | 0 | ND |
| 2022 | 0.158 ppb | 4 | 1 | ND - 0.633 ppb |
| 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 |
|---|---|---|
| 2018-02-27 | 18060003101 | ND |
| 2018-05-01 | 18123006001 | ND |
| 2018-07-10 | 18193006801 | 0.630 ppb |
| 2018-10-24 | 18298000201 | 2.68 ppb |
| 2019-02-18 | 19052004601 | ND |
| 2019-07-15 | 19198002101 | ND |
| 2019-10-28 | 19303001701 | ND |
| 2020-01-28 | 20030005207 | 0.810 ppb |
| 2020-06-16 | 20170004001 | ND |
| 2020-07-20 | 20204001201 | 3.14 ppb |
| 2020-11-17 | 20324002901 | ND |
| 2021-01-27 | 21028015101 | ND |
| 2021-04-21 | 21111000301 | ND |
| 2021-08-30 | 21245000201 | ND |
| 2021-10-26 | 21301005501 | ND |
| 2022-03-02 | O195908-VOC-1 | ND |
| 2022-05-24 | O198513-VOC-1 | ND |
| 2022-07-26 | O200115-VOC-1 | ND |
| 2022-10-24 | O203229-VOC-1 | 0.633 ppb |