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Pollen History for Ottawa
Daily Pollen Levels
Tree
Overall Level Very Low
Max Low
Grass
Overall Level Low
Max Moderate
Weed
Overall Level None
Max None
Compared to last year
Tree
Tree pollen is 10% higher than the same period last year
Grass
Grass pollen is similar to the same period last year
Weed
Not enough data for Weed
| Time | Tree | Grass | Weed |
|---|---|---|---|
| Jun 18 | Very Low | Moderate | None |
| Jun 17 | Very Low | Very Low | None |
| Jun 16 | Very Low | Moderate | None |
| Jun 15 | Very Low | Moderate | None |
| Jun 14 | Very Low | Very Low | None |
| Jun 13 | Very Low | Moderate | None |
| Jun 12 | Very Low | Moderate | None |
| Jun 11 | Very Low | Low | None |
| Jun 10 | None | None | None |
| Jun 9 | Very Low | Moderate | None |
| Jun 8 | Very Low | Moderate | None |
| Jun 7 | Very Low | Low | None |
| Jun 6 | Very Low | Very Low | None |
| Jun 5 | Very Low | Moderate | None |
| Jun 4 | Very Low | Moderate | None |
| Jun 3 | Very Low | Moderate | None |
| Jun 2 | Very Low | Moderate | None |
| Jun 1 | Very Low | Moderate | None |
| May 31 | Very Low | Low | None |
| May 30 | Very Low | Moderate | None |
| May 29 | Very Low | Low | None |
| May 28 | Very Low | Low | None |
| May 27 | Very Low | Low | None |
| May 26 | Very Low | Low | None |
| May 25 | Very Low | Very Low | None |
| May 24 | Very Low | Very Low | None |
| May 23 | Very Low | Very Low | None |
| May 22 | Low | Low | None |
| May 21 | Low | Very Low | None |
| May 20 | Low | Very Low | None |