Buiten Air Quality
Monitoring Station
· Leiden, Netherlands
111
Unhealthy for sensitive groups
Sensitive groups should reduce prolonged outdoor exertion.
Last Reading
Nearby Monitoring Stations
GoodModerateUSGUnhealthyVery UnhealthyHazardous
AQI Forecast
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9am
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12pm
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3pm
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6pm
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9pm
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12am
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3am
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6am
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Air Quality Forecast (24h)
PM2.539.7 µg/m³
×2.6 WHO
Unhealthy for sensitive groups
PM1046.4 µg/m³
Good
Station data from AQICN. AQI forecast from ECMWF CAMS. AQI calculated using US EPA standard. Updated 2026-10-21T12:26 UTC.