Air quality in May: cleanest & most polluted destinations

Where the air is cleanest — and worst — to travel in May, ranked by the monthly-mean US Air Quality Index (AQI) across 600+ destinations. Lower is better: 0–50 is good, 100+ starts to bite, 150+ is unhealthy. Tap any place for its full May weather and air-quality breakdown.

Worst air quality in May

  1. 1Hotan, ChinaVery unhealthy225AQI
  2. 2Nouakchott, MauritaniaUnhealthy177AQI
  3. 3Riyadh, Saudi ArabiaUnhealthy171AQI
  4. 4Jakarta, IndonesiaUnhealthy169AQI
  5. 5Ürümqi, ChinaUnhealthy157AQI
  6. 6Agra, IndiaUnhealthy154AQI
  7. 7Kuwait City, KuwaitUnhealthy153AQI
  8. 8Delhi, IndiaUnhealthy for sensitive groups146AQI
  9. 9Jeddah, Saudi ArabiaUnhealthy for sensitive groups138AQI
  10. 10Chengdu, ChinaUnhealthy for sensitive groups138AQI
  11. 11Mecca, Saudi ArabiaUnhealthy for sensitive groups134AQI
  12. 12Varanasi, IndiaUnhealthy for sensitive groups133AQI
  13. 13Beijing, ChinaUnhealthy for sensitive groups127AQI
  14. 14Chongqing, ChinaUnhealthy for sensitive groups126AQI
  15. 15Santiago, ChileUnhealthy for sensitive groups125AQI

Cleanest air in May

  1. 1Honiara, Solomon IslandsGood14AQI
  2. 2Nadi, FijiGood16AQI
  3. 3Christchurch, New ZealandGood18AQI
  4. 4Dunedin, New ZealandGood18AQI
  5. 5Falls Creek, AustraliaGood19AQI
  6. 6Mount Buller, AustraliaGood19AQI
  7. 7Puerto Natales, ChileGood19AQI
  8. 8Farellones, ChileGood20AQI
  9. 9Uluru, AustraliaGood20AQI
  10. 10Ushuaia, ArgentinaGood20AQI
  11. 11Wānaka, New ZealandGood20AQI
  12. 12Baños, EcuadorGood21AQI
  13. 13El Calafate, ArgentinaGood21AQI
  14. 14Perisher Valley, AustraliaGood21AQI
  15. 15Queenstown, New ZealandGood21AQI