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Explore air quality worldwide
Search supported places across 78 countries.
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Search supported places across 78 countries.
Source updated
Current air quality
Take extra breaks if you’re sensitive.
PM2.5
46 µg/m³AQI 89 · ModeratePM10
51 µg/m³AQI 29 · GoodNO₂
42 µg/m³AQI 21 · GoodSO₂
11 µg/m³AQI 6 · GoodBars show each pollutant’s US AQI on a 0–500 scale; concentrations above are in µg/m³.
Open air map About these readingsKathmandu · Compare the next 24 hours.
Lowest forecast AQI
2 am – 11 am
Nov 10 · 9 hours
Expected air quality
Moderate · AQI 88
1 AQI points lower than the current reading.
Lower pollution is relative. This window is still above the good-air range.
Nov 10 · 2 am
Moderate · AQI 88
Tap a bar to choose a time · Swipe for later hours
Kathmandu · What are you heading out for?
Choose where you’d like to walk
Pick a route and keep an indoor alternative in mind.
Your checklist stays in this view.
Based on general adult guidance and Kathmandu’s current reading. Activity selection changes the planning steps, not the AQI rating. Follow your clinician’s advice for health needs.
Recheck before leaving. Forecasts and air quality can change.
Understand your air
A higher US Air Quality Index means more polluted air. The good category runs from 0 to 50; the category determines the guidance shown here.
Particles up to 2.5 micrometers across. Their concentration is measured in µg/m³, a different unit from AQI.
Particles up to 10 micrometers across, including dust. Compare like-for-like pollutants and time periods when exploring trends.
The displayed AQI is 89, in the moderate air quality category. This selects the guidance above. Forecasts show how that index may change; they do not establish which source caused the pollution.
Explore nearby regional estimates and station observations, or plan a walk, ride, or drive.
Air Quality 101
Learn how schools can protect children from air pollution by monitoring AQI, adjusting outdoor activities, and improving classroom air quality.
Air Quality 101
A single citywide AQI can hide important differences between busy roads, residential lanes and open spaces. Discover what creates Kathmandu’s hyperlocal pollution hotspots.
Our Research
A practical AQI action plan for parents and schools, covering outdoor activity, classrooms, asthma, communication and cleaner air.