AAFA's 2026 Worst Allergy Cities — What's Happening Right Now

Every year, the Asthma and Allergy Foundation of America (AAFA) publishes its "Allergy Capitals" report — ranking the 100 most challenging U.S. cities for people with seasonal allergies. The 2026 list just came out, and media outlets like Newsweek have been publishing the top 20.

But AAFA's ranking is based on annual averages — pollen scores, allergy medication use, and the number of allergy specialists. It tells you where allergies are worst on average over a year, not where the pollen is actually terrible today.

So I pulled up live pollen data for all 20 cities on AAFA's 2026 list. Here's what's happening right now.

AAFA's 2026 Top 20 Worst Allergy Cities

Click any city below to see its live pollen count, air quality, and today's YES/NO/CAUTION recommendation for going outside:

Source: AAFA 2026 Allergy Capitals Report (published April 2026). See also: aafa.org/allergy-capitals for the full methodology.

Why these cities?

AAFA ranks cities using three factors, each weighted equally:

1. Pollen scores — average tree, grass, and weed pollen over the year
2. Over-the-counter medication use — how much antihistamine residents buy per capita (a proxy for how many people struggle)
3. Allergy specialists per capita — fewer specialists = less access to treatment = higher "difficulty" score

What's striking in the 2026 list: three of the top 5 are Western U.S. cities (Boise, Provo, Tulsa was #3 in Central). This reflects two trends:

• Milder winters and warmer springs extending pollen seasons in the Mountain West
• Unique regional pollens (juniper, cottonwood) that aren't always captured in East Coast-centric research

What the annual ranking misses

Here's the gap: AAFA's ranking tells you where to worry on average, but not what to do today.

If you live in Miami (which isn't in AAFA's top 20), you might still have a catastrophic pollen day because of a cold front pushing north Florida's pine pollen your way. Meanwhile, your cousin in Boise (#1 on AAFA's list) might be enjoying a low pollen day after a good rainstorm.

The annual ranking is great for choosing where to retire. For deciding whether your kid can go to the playground this afternoon, you need live data.

How I use both together

I have two kids with seasonal allergies. Here's how I actually use AAFA's ranking and live pollen data together:

Regional pattern in the 2026 list

Looking at the top 20, a pattern emerges:

No surprise to allergy sufferers: the Mountain West dominates. Tree pollen (especially juniper and cottonwood) arrives early and lingers in the dry air.

What's changed from 2025

A few notable movements in the 2026 AAFA report:

• Boise jumped to #1 (was #4 in 2025) — likely driven by an unusually intense juniper season
• New entries in top 20: Lakeland, FL makes its debut, reflecting Florida's extending pine pollen season
• Dropped off: Oklahoma City and Scranton were in the 2025 top 20 but fell out of 2026's list

FAQ

Is AAFA's ranking medically authoritative?

AAFA is the oldest patient-focused allergy organization in the U.S. (founded 1953). Their Allergy Capitals report is peer-reviewed and uses CDC medication data plus AAAAI-registered pollen counters. It's the most widely cited ranking in American media — you'll see it referenced by Newsweek, USA Today, NBC, and most major newspapers.

Why isn't Atlanta/Houston/Miami on the list?

AAFA's methodology weights cities equally regardless of population. Atlanta has very high pollen but also many allergy specialists and good OTC access, bringing its overall "difficulty score" down. Smaller Western cities with fewer specialists rank higher even with similar raw pollen counts.

Should I move away from a top-20 city?

Only if allergies are severely impacting your life. For most people, good daily management (tracking, air purifier, antihistamines) is far more cost-effective than moving. But for people with severe asthma-linked allergies, a coastal or drier-climate move can be life-changing. Always consult your allergist first.

How can I track pollen in my city if it's not in AAFA's list?

PollenTracker covers 800+ US and UK cities, with live data refreshed every 4 hours. If your city has 50,000+ people, we've got it.

Check your city today

Whether you're in Boise (#1) or a smaller city not on AAFA's list at all, the same logic applies: the annual ranking is a planning tool, but today's decision needs today's data.

— Peter, dad of two allergic kids, builder of PollenTracker