Cobalt
City of Edmonds
NOTE: City of Edmonds purchases water from Alderwood Water District which is required to test for cobalt. Sample information shown below was taken by Alderwood Water District.
Cobalt is a metal found throughout the environment; people may be exposed to cobalt in air, food and drinking water.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2013 | ND | 8 | 0 | ND |
| 2014 | N/A | 0 | 0 | N/A |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | N/A | 0 | 0 | N/A |
| 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 | N/A | 0 | 0 | N/A |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EWG Health Guideline: 70 ppb
The EWG Health Guideline of 70 ppb for cobalt was defined by the Environmental Protection Agency as a benchmark for testing under the Unregulated Contaminant Monitoring Rule program. This health guideline protects against change in blood chemistry.
ppb = parts per billion
All test results
NOTE: City of Edmonds purchases water from Alderwood Water District which is required to test for cobalt. Sample information shown below was taken by Alderwood Water District.
| Date | Lab ID | Result |
|---|---|---|
| 2013-02-11 | WA97-SE1-13-02416-5573 | ND |
| 2013-02-11 | WA97-SE1-13-02418-5575 | ND |
| 2013-05-08 | WA97-SE2-13-07881-18269 | ND |
| 2013-05-08 | WA97-SE2-13-07884-18273 | ND |
| 2013-08-15 | WA97-SE3-13-15249-34739 | ND |
| 2013-08-15 | WA97-SE3-13-15249-34738 | ND |
| 2013-11-06 | WA97-SE4-13-21199-48215 | ND |
| 2013-11-06 | WA97-SE4-13-21199-48214 | ND |