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If you've been sneezing more than usual this spring, it's not your imagination. The Asthma and Allergy Foundation of America just released its **2026 Allergy Capitals report**, and the results show pollen seasons are getting longer, more intense, and hitting cities that never used to make the list.Boise, Idaho, now ranks as the worst city in America for allergy sufferers — a first for the Western city. Here's the full breakdown of which cities are hardest hit, why it's getting worse, and what actually works to manage symptoms.
## 2026 Allergy Capitals: Top 20 Worst Cities
The AAFA ranks the 100 most-populated metro areas based on three factors: pollen counts (tree, grass, and weed), over-the-counter allergy medication sales, and availability of board-certified allergists.
::stats
- 106 million Americans experience allergies annually
- 82 million suffer from seasonal hay fever specifically
- The U.S. growing season has expanded by 16 days since 1970
- Allergy-related costs hit $115 billion per year in the U.S.
::/stats
| Rank | City | State | Notable Factor |
|------|------|-------|----------------|
| 1 | Boise | Idaho | First time at #1; high pollen, few specialists |
| 2 | San Diego | California | Atmospheric rivers fueling plant growth |
| 3 | Tulsa | Oklahoma | Consistently high tree and grass pollen |
| 4 | Provo | Utah | Mountain valleys trap pollen |
| 5 | Rochester | New York | Rising pollen counts, limited specialists |
| 6 | Wichita | Kansas | Historic allergy capital, still severe |
| 7 | Raleigh | North Carolina | Early tree pollen bloom |
| 8 | Ogden | Utah | Third Utah city in top 15 |
| 9 | Spokane | Washington | Western shift in allergy hotspots |
| 10 | Greenville | South Carolina | Southern pollen corridor |
| 11 | San Francisco | California | Second California city in top 20 |
| 12 | Minneapolis | Minnesota | Warming winters extending season |
| 13 | Salt Lake City | Utah | Valley inversion traps allergens |
| 14 | Richmond | Virginia | East Coast pollen belt |
| 15 | Colorado Springs | Colorado | High altitude doesn't help anymore |
| 16 | Little Rock | Arkansas | Traditional Southern allergy zone |
| 17 | Toledo | Ohio | Midwest pollen surge |
| 18 | New Orleans | Louisiana | Year-round pollen emerging |
| 19 | Winston-Salem | North Carolina | Two NC cities in top 20 |
| 20 | Lakeland | Florida | Subtropical pollen overlap |
## Why Allergies Are Getting Worse in 2026
::keyfacts
- **Climate shift:** The contiguous U.S. has warmed roughly 0.5°F per decade over 70 years, directly extending pollen production windows
- **Atmospheric rivers:** Heavy moisture events in the West followed by warmth are fueling explosive plant growth in cities like Boise and San Diego
- **Western migration:** Allergy hotspots historically clustered in the South and Northeast — 2026 marks a dramatic shift toward Western cities
- **Year-round pollen:** Experts expect "year-round" pollen in the South to spread northward as winters continue to mellow
::/keyfacts
"We are experiencing a widening health threat fueled by climate change," said AAFA President Kenneth Mendez. "We need climate solutions, and we need them now."
The growing season has expanded by an average of 16 days nationally since 1970, with some regions seeing increases of over four weeks. Record-breaking warm temperatures in February 2026 triggered early tree pollen blooms across the South and West, catching many off guard.
For full coverage, visit https://www.linos.ai/health/worst-cities-allergies-2026-aafa-rankings-how-to-survive/
About Linos NEWS: Linos NEWS (https://www.linos.ai) delivers breaking news and in-depth analysis across politics, technology, business, science, health, world affairs, sports, and entertainment.