Live Air Quality (AQI) Now

This live air-quality checker reads the pollution right where you are. Tap "My location" or search any city, and it pulls the current reading and short-term forecast from Open-Meteo's air-quality model, then scores it on the US EPA Air Quality Index — the familiar 0 to 500 colour scale that runs from green "Good" to maroon "Hazardous".

The dial shows the headline US AQI, which is driven by whichever pollutant is worst at that moment. Below it you get the six ground-level pollutants behind that number in µg/m³: fine particulate PM2.5 (the one that reaches deep into your lungs), coarse PM10, ozone (O₃), nitrogen dioxide (NO₂), sulphur dioxide (SO₂) and carbon monoxide (CO). A colour-matched card translates the score into plain advice — whether to exercise outside, open a window or wear a mask.

Two extra views help you plan. A cigarette-equivalent line uses the Berkeley Earth rule of thumb (about 22 µg/m³ of PM2.5 for a day roughly equals one cigarette) to make the number visceral. The hour-by-hour curve highlights today's cleanest and peak hours, and a four-day forecast charts each day's expected maximum AQI. It is awareness information built on modelled data, not medical advice or an official monitor reading.