Chloromethane
Howard Water Co-op
NOTE: Howard Water Co-op purchases water from Rockett SUD which is required to test for chloromethane. Sample information shown below was taken by Rockett SUD.
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.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 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
NOTE: Howard Water Co-op purchases water from Rockett SUD which is required to test for chloromethane. Sample information shown below was taken by Rockett SUD.
| Date | Lab ID | Result |
|---|---|---|
| 2015-01-29 | Q1503521001 | ND |
| 2015-01-29 | Q1503521003 | ND |
| 2015-04-20 | Q1514673001 | ND |
| 2015-04-20 | Q1514673003 | ND |
| 2015-07-22 | Q1528297001 | ND |
| 2015-07-22 | Q1528297003 | ND |
| 2015-10-19 | Q1540792001 | ND |
| 2015-10-19 | Q1540792003 | ND |