Chloromethane
Norwalk First Taxing 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.
12
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 |
|---|---|---|---|---|
| 2013 | ND | 3 | 0 | ND |
| 2014 | ND | 3 | 0 | ND |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | ND | 1 | 0 | ND |
| 2019 | ND | 1 | 0 | ND |
| 2020 | ND | 1 | 0 | ND |
| 2021 | ND | 1 | 0 | ND |
| 2022 | ND | 1 | 0 | ND |
| 2023 | ND | 1 | 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 |
|---|---|---|
| 2013-07-16 | 201307170590AM | ND |
| 2013-07-16 | 201307170585AM | ND |
| 2013-10-21 | 201310220088AM | ND |
| 2014-01-27 | 201401280236AM | ND |
| 2014-01-27 | 201401280238AM | ND |
| 2014-04-22 | 201404230371AM | ND |
| 2018-05-08 | 214-14006VOC1 | ND |
| 2019-02-14 | 214-14546VOC1 | ND |
| 2020-09-10 | 214-16879VOC1 | ND |
| 2021-03-11 | 214-17912VOC1 | ND |
| 2022-02-09 | 214-19466VOC1 | ND |
| 2023-02-09 | 214-20843VOC1 | ND |