Cobalt
City of Redmond Water System
Cobalt is a metal found throughout the environment; people may be exposed to cobalt in air, food and drinking water.
18
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 | ND | 2 | 0 | ND |
| 2015 | ND | 16 | 0 | ND |
| 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
| Date | Lab ID | Result |
|---|---|---|
| 2014-09-24 | A4H1630-01A | ND |
| 2014-09-24 | A4H1630-06A | ND |
| 2015-03-04 | A5B1435-01A | ND |
| 2015-03-04 | A5B1435-06A | ND |
| 2015-06-09 | A5C2165-09A | ND |
| 2015-06-09 | A5C2165-11A | ND |
| 2015-06-09 | A5C2165-07A | ND |
| 2015-06-09 | A5C2165-01A | ND |
| 2015-06-09 | A5C2165-05A | ND |
| 2015-06-09 | A5C2165-03A | ND |
| 2015-08-18 | A5G2132-01A | ND |
| 2015-09-09 | A5C2343-07A | ND |
| 2015-09-09 | A5C2347-03A | ND |
| 2015-09-09 | A5C2347-01A | ND |
| 2015-09-09 | A5C2343-01A | ND |
| 2015-09-09 | A5C2343-05A | ND |
| 2015-09-09 | A5C2343-03A | ND |
| 2015-12-15 | A5K1615-01A | ND |