Chloromethane
West Sound Utility District #1
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.
30
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 | 0.0356 ppb | 9 | 1 | ND - 0.320 ppb |
| 2015 | 0.0356 ppb | 9 | 1 | ND - 0.320 ppb |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | ND | 3 | 0 | ND |
| 2019 | N/A | 0 | 0 | N/A |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | N/A | 0 | 0 | N/A |
| 2023 | ND | 9 | 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 |
|---|---|---|
| 2014-09-22 | 201409240418AM | ND |
| 2014-09-22 | 201409240412AM | ND |
| 2014-09-22 | 201409240416AM | ND |
| 2014-09-22 | 201409240534AM | ND |
| 2014-09-23 | 201409250515AM | ND |
| 2014-09-23 | 201409250596AM | 0.320 ppb |
| 2014-09-23 | 201409250638AM | ND |
| 2014-09-23 | 201409250525AM | ND |
| 2014-09-24 | 201409260328AM | ND |
| 2015-03-16 | 201503180707AM | ND |
| 2015-03-16 | 201503180809AM | ND |
| 2015-03-16 | 201503180471AM | ND |
| 2015-03-16 | 201503180807AM | ND |
| 2015-03-17 | 201503190566AM | ND |
| 2015-03-17 | 201503190512AM | 0.320 ppb |
| 2015-03-17 | 201503190483AM | ND |
| 2015-03-18 | 201503200243AM | ND |
| 2015-03-18 | 201503200254AM | ND |
| 2018-02-23 | ND | |
| 2018-07-06 | ND | |
| 2018-10-09 | ND | |
| 2023-05-17 | 4468291 | ND |
| 2023-05-17 | 4468292 | ND |
| 2023-05-17 | 4468290 | ND |
| 2023-05-17 | 4468290 | ND |
| 2023-05-17 | 4468282 | ND |
| 2023-05-19 | 4468273 | ND |
| 2023-05-19 | 4468272 | ND |
| 2023-05-19 | 4468272 | ND |
| 2023-05-19 | 4468272 | ND |