Cobalt
St John Water District 1
Cobalt is a metal found throughout the environment; people may be exposed to cobalt in air, food and drinking water.
12
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 | 12 | 0 | ND |
| 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
| Date | Lab ID | Result |
|---|---|---|
| 2014-02-24 | 35127683001AM | ND |
| 2014-02-24 | 35127683003AM | ND |
| 2014-02-24 | 35127683007AM | ND |
| 2014-02-24 | 35127683005AM | ND |
| 2014-05-27 | 35139726003AM | ND |
| 2014-05-27 | 35139726001AM | ND |
| 2014-08-26 | 35152455007AM | ND |
| 2014-08-26 | 35152455003AM | ND |
| 2014-08-26 | 35152455001AM | ND |
| 2014-08-26 | 35152455005AM | ND |
| 2014-11-13 | 35164002003AM | ND |
| 2014-11-13 | 35164002001AM | ND |