Air Quality Guides
In-depth, data-driven guides to understanding air quality, protecting your health, and finding the best places to live for clean air. Backed by 10 years of EPA monitoring data from 1,000+ US cities.
Education
Understanding Air Quality: What the AQI Really Means
A comprehensive guide to the Air Quality Index — how it works, what each level means for your health, and why 10-year trends matter more than daily readings.
April 10, 2026
HealthHow Air Pollution Affects Your Health and What to Do About It
What happens when you breathe polluted air, who is most at risk, and evidence-based steps to reduce your exposure based on AQI levels.
April 10, 2026
AnalysisThe Cleanest and Most Polluted Cities in America: A 10-Year Analysis
A data-driven look at which US cities have the best and worst air quality, what drives the differences, and which cities are improving fastest.
April 10, 2026