🌿 CleanAirData

Explore Air Quality by City

Your entry point to US city air quality data. Check AQI today, compare median AQI in 2021, and see unhealthy days per year for any city. Browse EPA-based Clean Air Scores, see how cities compare in our National Rankings, and learn about our data sources in the Methodology.

Top 10 cleanest US cities (2026 snapshot)

#1 Hilo, HI #2 Honolulu, HI #3 Anacortes, WA #4 Bremerton, WA #5 Pearl City, HI #6 Waipahu, HI #7 Mount Vernon, WA #8 Mililani Town, HI #9 Bainbridge Island, WA #10 Oak Harbor, WA

Trending City Reports

Prioritize these pages if you are tracking AQI today, 2021 median AQI, or unhealthy-day trends:

Los Angeles AQI Today ↗ Yuma 2021 Median AQI ↗ Tucson 2021 Median AQI ↗ Sierra Vista 2021 Median AQI ↗ Gallatin Unhealthy Days ↗ Denver AQI Today ↗ Phoenix AQI Today ↗ New York City AQI Today ↗ Atlanta AQI Today ↗

Popular Search Cities

These pages already have search demand and are the fastest path to higher CTR:

Los Angeles, CA Yuma, AZ Tucson, AZ Sierra Vista, AZ Gallatin, TN Denver, CO Atlanta, GA Phoenix, AZ New York City, NY
Showing 1-50 of 2771 Cities
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City State Score Grade PM2.5 (Ann.) Trend
Hilo HI 89.7 Grade A 2.7 Improving ↓ View
Honolulu HI 89.6 Grade A 4.1 Stable View
Anacortes WA 89.6 Grade A 4.4 Improving ↓ View
Bremerton WA 89.6 Grade A 3.9 Improving ↓ View
Pearl City HI 89.6 Grade A 4.1 Stable View
Waipahu HI 89.6 Grade A 4.1 Stable View
Mount Vernon WA 89.6 Grade A 4.4 Improving ↓ View
Mililani Town HI 89.6 Grade A 4.1 Stable View
Bainbridge Island WA 89.6 Grade A 3.9 Improving ↓ View
Oak Harbor WA 89.6 Grade A 4.4 Improving ↓ View
β€˜Ewa Gentry HI 89.6 Grade A 4.1 Stable View
Port Angeles WA 89.6 Grade A 4.4 Improving ↓ View
Silverdale WA 89.6 Grade A 3.9 Improving ↓ View
Makakilo HI 89.6 Grade A 4.1 Stable View
Wahiawā HI 89.6 Grade A 4.1 Stable View
Kailua HI 89.5 Grade A 2.9 Improving ↓ View
East Honolulu HI 89.5 Grade A 2.9 Improving ↓ View
Kaneohe HI 89.5 Grade A 2.9 Improving ↓ View
San Luis Obispo CA 89.4 Grade A 3.9 Improving ↓ View
Pueblo CO 89.4 Grade A 4.7 Stable View
Portland OR 89.4 Grade A 4.9 Improving ↓ View
Vancouver WA 89.4 Grade A 4.5 Improving ↓ View
Gresham OR 89.4 Grade A 4.9 Improving ↓ View
Beaverton OR 89.4 Grade A 4.9 Improving ↓ View
Longview WA 89.4 Grade A 4.5 Improving ↓ View
Pueblo West CO 89.4 Grade A 4.7 Stable View
Camas WA 89.4 Grade A 4.5 Improving ↓ View
Milwaukie OR 89.4 Grade A 4.9 Improving ↓ View
Lents OR 89.4 Grade A 4.9 Improving ↓ View
Salmon Creek WA 89.4 Grade A 4.5 Improving ↓ View
Orchards WA 89.4 Grade A 4.5 Improving ↓ View
Hazel Dell WA 89.4 Grade A 4.5 Improving ↓ View
Battle Ground WA 89.4 Grade A 4.5 Improving ↓ View
Happy Valley OR 89.4 Grade A 4.9 Improving ↓ View
Five Corners WA 89.4 Grade A 4.5 Improving ↓ View
Troutdale OR 89.4 Grade A 4.9 Improving ↓ View
Apache Junction AZ 89.3 Grade A 4.5 Stable View
Chicopee MA 89.3 Grade A 5 Stable View
Bangor ME 89.3 Grade A 4.9 Worsening ↑ View
Lewiston ME 89.3 Grade A 4.2 Improving ↓ View
Tualatin OR 89.3 Grade A 4.8 Improving ↓ View
Laramie WY 89.3 Grade A 2 Improving ↓ View
San Tan Valley AZ 89.3 Grade A 4.5 Stable View
North Chicopee MA 89.3 Grade A 5 Stable View
Tigard OR 89.3 Grade A 4.8 Improving ↓ View
Westfield MA 89.3 Grade A 5 Stable View
Holyoke MA 89.3 Grade A 5 Stable View
Amherst MA 89.3 Grade A 5 Stable View
Lake Oswego OR 89.3 Grade A 4.8 Improving ↓ View
Oregon City OR 89.3 Grade A 4.8 Improving ↓ View
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