Pollen Allergy Risk
What is the Pollen Allergy Risk?
The Pollen Allergy Risk Index is a comprehensive measure that evaluates the total concentration of pollen grains in the ambient air, including pollen from grasses, trees (such as birch, oak, elm), and weeds (such as ragweed). This index is especially important for millions of people who suffer from seasonal allergic rhinitis, allergic asthma, and other allergy-related conditions. The index considers not only pollen count but also meteorological factors that influence pollen dispersion and concentration, such as relative humidity and wind speed. Lower values (0-4) indicate safer conditions for allergy sufferers, while high values (7-10) suggest that allergic symptoms may be severe, requiring additional precautions and possible adjustment of antihistamine medications.
How is the Pollen Allergy Risk calculated?
- Grass pollen count: High concentrations (above 50 grains/m³) significantly increase the risk index, causing severe allergic symptoms during spring and summer.
- Tree pollen count: Tree pollen (birch, oak, elm) in concentrations above 90 grains/m³ increases the index, especially during spring when trees bloom.
- Weed pollen count: Ragweed and other weeds produce pollen in late summer and fall. Concentrations above 15 grains/m³ increase the index and cause allergic symptoms.
- Air humidity: High humidity (above 70%) can cause pollen to clump and fall, reducing the index. Low humidity (below 40%) keeps pollen in the air, increasing the index.
- Wind speed: Moderate winds (15-30 km/h or 9-18 mph) disperse pollen and increase the index. Very strong winds may remove pollen, while calm conditions allow accumulation, both affecting the index.
Understanding the Pollen Allergy Risk Scale (0-10)
Pollen Allergy Risk: Top Cities Comparison
| City | Country | Today | Tomorrow | Change |
|---|---|---|---|---|
| Tokyo | Japan | 2 / 10 Very Low | 2 / 10 Very Low | 0 |
| Osaka | Japan | 2 / 10 Very Low | 2 / 10 Very Low | 0 |
| Kyoto | Japan | 2 / 10 Very Low | 2 / 10 Very Low | 0 |
| London | United Kingdom | 2 / 10 Very Low | 2 / 10 Very Low | 0 |
| Rome | Italy | 2 / 10 Very Low | 2 / 10 Very Low | 0 |
| Paris | France | 2 / 10 Very Low | 2 / 10 Very Low | 0 |
| Delhi | India | 2 / 10 Very Low | 2 / 10 Very Low | 0 |
| Florence | Italy | 2 / 10 Very Low | 2 / 10 Very Low | 0 |
| New York City | United States | 2 / 10 Very Low | 2 / 10 Very Low | 0 |
| Hanoi | Vietnam | 2 / 10 Very Low | 2 / 10 Very Low | 0 |
Pollen Allergy Risk: Tips & Recommendations
- Keep windows closed on high pollen days
- Take antihistamine medications as recommended
- Plan outdoor activities for low pollen days
- Wear sunglasses to protect eyes from pollen