Live Intelligence

How healthy is your air?

Track wildfire smoke and air quality trends for over 200 US cities in real-time.

Top searches: Tallahassee, Los Angeles, Seattle

National Status Map

Loading National Air Quality Map...
Official AQI Scale
Good (0-50)
Moderate (51-100)
USG (101-150)
Unhealthy (151-200)
Very Unhealthy
Hazardous

Common Questions & Resources

Simple guides to understanding air quality data.

What exactly is "AQI"?

The Air Quality Index (AQI) is the EPA's "thermometer" for air pollution. It runs from 0 to 500.

0-50GreenGreat outdoor air. No risk.
51-100YellowModerate. OK for most, but sensitive people should watch out.
101-150OrangeUnhealthy for Sensitive Groups (Kids, Asthma, Elderly).
151-200RedUnhealthy. Skip the outdoor run.
201-300PurpleVery Unhealthy. Risk for everyone.
301+MaroonHazardous. Emergency conditions.

Where does this data come from?

We pull straight from the US EPA's official monitoring network. These are high-grade government sensors, not cheap home devices. For the 10-year history, we analyzed millions of data points to find long-term trends for your city.

Why does the map show "Wildfire Smoke"?

Smoke is now the #1 cause of "bad air days" in the US. Even if you don't live near a fire, smoke can travel thousands of miles. We track "PM2.5" (tiny particles) because that's usually what smoke is made of.

10-Year Historical Trends

We analyze a decade of EPA data to tell you if your city's air is getting better or worse over time.

Wildfire Smoke Season

Know exactly when smoke season hits your area with our proprietary seasonality heatmaps.

Actionable Protection

Get specific CADR recommendations for your room size to keep your indoor air safe.