Chloromethane
Middletown Water Department
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)
0
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | ND | 3 | 0 | ND |
| 2015 | ND | 3 | 0 | ND |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | ND | 2 | 0 | ND |
| 2019 | ND | 2 | 0 | ND |
| 2020 | ND | 2 | 0 | ND |
| 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 |
|---|---|---|
| 2014-08-11 | 200401595 | ND |
| 2014-08-11 | 200401594 | ND |
| 2014-11-19 | 200408290 | ND |
| 2015-02-26 | 200412753 | ND |
| 2015-02-26 | 200412752 | ND |
| 2015-05-20 | 200417220 | ND |
| 2018-03-28 | VOC1 200490770 | ND |
| 2018-04-16 | VOC1 200492154 | ND |
| 2019-05-13 | VOC1 200531893 | ND |
| 2019-05-21 | VOC1 200533083 | ND |
| 2020-05-06 | VOC1 200574723 | ND |
| 2020-05-14 | VOC1 200575833 | ND |
| 2021-03-03 | VOC1 200612185 | ND |
| 2021-03-30 | VOC1 200612184 | ND |
| 2021-03-30 | VOC1 200612183 | ND |
| 2022-05-11 | V300182524 300182531 | ND |
| 2022-05-11 | V300182526 300182544 | ND |
| 2023-06-23 | V300370771 300370772 | ND |
| 2023-06-23 | V300370773 300370774 | ND |