NASA's TEMPO Is Mapping Every American's Air Quality — Hourly

For the first time in history, a satellite is watching North America's air pollution change hour by hour, revealing when and where Americans breathe the most harmful air.

A Pollution Monitor the Size of a Mini Fridge in Space

TEMPO (Tropospheric Emissions: Monitoring of Pollution) sits in a fixed orbit above North America, scanning the continent every hour — 50x more data than previous daily satellite passes.

Rush Hour Pollution Spikes Are Far Worse Than Known

TEMPO revealed that morning and evening rush hours cause nitrogen dioxide levels to spike 4x above non-peak levels — far worse than models predicted, exposing millions of commuters to harmful pollution every day.

TEMPO Confirms Pollution Inequality Across America

TEMPO's hour-by-hour data confirmed what environmental justice advocates have long argued: low-income communities and communities of color breathe air that is 2-3x more polluted than wealthier, predominantly white neighborhoods.

TEMPO Data Is Already Changing Policy

States and cities are using TEMPO data to target pollution hotspots, guide EV infrastructure, and comply with EPA standards more precisely. Real-time air monitoring at this scale is transforming clean air enforcement. Read the Full Report →

Why This Matters for America

Data from federal agencies shows this issue directly affects millions of Americans. Understanding the scope is the first step toward meaningful action and lasting solutions.

Communities on the Front Lines

Across the United States, communities are experiencing the real-world consequences. Local economies, public health, and ecosystems are all interconnected—solutions must address all three.

What Researchers Are Finding

Leading scientists from NOAA, NASA, EPA, and universities nationwide are documenting alarming trends. The evidence is clear: urgent action is needed to protect America's future.

Driving Forces Behind the Crisis

Climate change, industrial activity, policy gaps, and resource mismanagement combine to accelerate this crisis. Addressing root causes—not just symptoms—is essential for lasting change.

Progress When We Act Together

Success stories from across America show that informed policy, community action, and scientific innovation can reverse damage and restore resilience. The path forward exists.