Air & health

Air Quality & AQI by City

Is it safe to be outside today? Each city page leads with the answer — the live AQI, the main pollutant driving it, and a go/no-go for outdoor exercise — then explains how to read the EPA scale so the number actually means something. Built on open Open-Meteo / Copernicus CAMS data — no ads, no app, across 31,257 U.S. cities.

Air quality by city

The largest U.S. cities by population. Every city in the corpus has an air-quality page at /air-quality/[state]/[city].