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  3. South Holland
  4. Leiden

Leiden

Leiden, South Holland

2026-01-20 12:00
AQI (US)
Moderate
Pollutants|Pollens
PM2.5
μg/m³
29.3
PM10
μg/m³
22.4
Weather
  • ℃
  • ℉
4℃
89%
8 kph
0 of 11
Historical Data
  • Hourly
  • Daily
  • AQI (US)
  • Allergy Risk
  • PM2.5
  • PM10
  • Alder
  • Ragweed
  • Mugwort
  • Birch
  • Olive Tree
  • Grasses
Places included
Site 25031
AQI 54
Site 66272
AQI 31
Site 72464
AQI 62
Site 72915
AQI 72
Site 81839
AQI 56
Site 82032
AQI 60
Site 88050
AQI 62
Site 88291
AQI 112
Data Sources
https://www.luchtmeetnet.nl/http://www.polleninfo.org

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