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Pollen History for Ottawa
Daily Pollen Levels
Tree
Overall Level Very Low
Max Low
Grass
Overall Level Very Low
Max Moderate
Weed
Overall Level None
Max Very Low
Compared to last year
Tree
Tree pollen is 18% higher than the same period last year
Grass
Grass pollen is 35% lower than the same period last year
Weed
Not enough data for Weed
| Time | Tree | Grass | Weed |
|---|---|---|---|
| Aug 18 | Very Low | None | Very Low |
| Aug 17 | Very Low | None | Very Low |
| Aug 16 | Very Low | None | Very Low |
| Aug 15 | Very Low | None | Very Low |
| Aug 14 | Very Low | None | Very Low |
| Aug 13 | Very Low | None | Very Low |
| Aug 12 | Very Low | None | Very Low |
| Aug 11 | Very Low | None | Very Low |
| Aug 10 | Very Low | None | Very Low |
| Aug 9 | Very Low | None | Very Low |
| Aug 8 | Very Low | None | Very Low |
| Aug 7 | Very Low | None | Very Low |
| Aug 6 | Very Low | None | Very Low |
| Aug 5 | Very Low | None | Very Low |
| Aug 4 | Very Low | None | Very Low |
| Aug 3 | Very Low | None | Very Low |
| Aug 2 | None | None | None |
| Aug 1 | Very Low | None | Very Low |
| Jul 31 | Very Low | None | Very Low |
| Jul 30 | Very Low | None | Very Low |
| Jul 29 | None | None | None |
| Jul 28 | Very Low | None | None |
| Jul 27 | Very Low | None | None |
| Jul 26 | Very Low | None | None |
| Jul 25 | Very Low | None | None |
| Jul 24 | Very Low | None | None |
| Jul 23 | Very Low | None | None |
| Jul 22 | Very Low | None | None |
| Jul 21 | Very Low | None | None |
| Jul 20 | Very Low | None | None |