Chloromethane
Manchester Water 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 |
|---|---|---|---|---|
| 2015 | 0.0360 ppb | 10 | 1 | ND - 0.360 ppb |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | ND | 1 | 0 | ND |
| 2019 | N/A | 0 | 0 | N/A |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | ND | 2 | 0 | ND |
| 2022 | N/A | 0 | 0 | N/A |
| 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 |
|---|---|---|
| 2015-03-18 | 201503090113AM | ND |
| 2015-03-18 | 201503090110AM | 0.360 ppb |
| 2015-03-18 | 201503090112AM | ND |
| 2015-03-18 | 201503090111AM | ND |
| 2015-05-12 | 201503220006AM | ND |
| 2015-08-18 | 201507160215AM | ND |
| 2015-09-24 | 201508180008AM | ND |
| 2015-09-24 | 201510020573AM | ND |
| 2015-09-24 | 201510020606AM | ND |
| 2015-09-24 | 201510020474AM | ND |
| 2018-10-02 | ND | |
| 2021-04-05 | 4107001 | ND |
| 2021-04-05 | 4107002 | ND |