Chloromethane
Gafford Chapel Water Supply Corporation
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 |
|---|---|---|---|---|
| 2018 | 0.295 ppb | 2 | 1 | ND - 0.590 ppb |
| 2019 | 0.465 ppb | 2 | 1 | ND - 0.930 ppb |
| 2020 | ND | 3 | 0 | ND |
| 2021 | 0.435 ppb | 2 | 1 | ND - 0.870 ppb |
| 2022 | 0.595 ppb | 2 | 1 | ND - 1.19 ppb |
| 2023 | 1.11 ppb | 2 | 2 | 0.700 ppb - 1.51 ppb |
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 |
|---|---|---|
| 2018-04-12 | Q1815138011 | ND |
| 2018-04-12 | Q1815138014 | 0.590 ppb |
| 2019-05-22 | Q1927789003 | 0.930 ppb |
| 2019-05-22 | Q1927789005 | ND |
| 2020-02-20 | Q2006545001 | ND |
| 2020-03-30 | Q2012915001 | ND |
| 2020-05-26 | Q2020631003 | ND |
| 2021-10-14 | Q2128874013 | 0.870 ppb |
| 2021-10-14 | Q2128874015 | ND |
| 2022-07-27 | Q2221394001 | ND |
| 2022-10-26 | Q2232337003 | 1.19 ppb |
| 2023-07-18 | Q2327998005 | 1.51 ppb |
| 2023-07-18 | Q2327998007 | 0.700 ppb |