Table 5.
Uranium concentrations in drinking water by ecozone
| Ecozone | No. of first draw samples >20 μg/L | No. of flushed samples >20 μg/L | Maximum concentration, μg/L |
|---|---|---|---|
| Boreal Cordillera | 0 | 0 | 0.4 |
| Boreal Plains | 0 | 0 | 13 |
| Montane Cordillera | 0 | 0 | 10.3 |
| Pacific Maritime | 0 | 0 | 0.6 |
| Taiga Plains | 0 | 0 | 0.8 |
| Taiga Shield | 0 | 0 | 2.2 |
| Boreal Shield | 22 | 22 | 58 |
| Prairies | 2 | 2 | 46 |
| Hudson Plains | 0 | 0 | 0.1 |
| Mixedwood Plains | 0 | 0 | 4.0 |
| Atlantic Maritime | 0 | 0 | 9.6 |
| Total | 24 | 24 | 58 |
Maximum acceptable concentration, MAC: >20 μg/L (Health Canada 2019b)