Cobalt
Tualatin Valley Water District
Cobalt is a metal found throughout the environment; people may be exposed to cobalt in air, food and drinking water.
20
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 | 10 | 0 | ND |
| 2015 | ND | 10 | 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 |
|---|---|---|
| 2014-08-13 | 201408140405AM | ND |
| 2014-08-13 | 201408140547AM | ND |
| 2014-08-13 | 201408140326AM | ND |
| 2014-08-13 | 201408140336AM | ND |
| 2014-08-13 | 201408140329AM | ND |
| 2014-08-13 | 201408140528AM | ND |
| 2014-11-18 | 201411190456AM | ND |
| 2014-11-18 | 201411190460AM | ND |
| 2014-11-18 | 201411190458AM | ND |
| 2014-11-18 | 201411190462AM | ND |
| 2015-02-24 | 201502260475AM | ND |
| 2015-02-25 | 201502260455AM | ND |
| 2015-02-25 | 201502260316AM | ND |
| 2015-02-25 | 201502260208AM | ND |
| 2015-06-29 | 201506300446AM | ND |
| 2015-06-29 | 201506300309AM | ND |
| 2015-06-29 | 201506300318AM | ND |
| 2015-06-29 | 201506300316AM | ND |
| 2015-06-29 | 201506300295AM | ND |
| 2015-06-29 | 201506300303AM | ND |