Worst air pollution Leidschendam, today and tomorrow
Today (16 July): Air quality in Leidschendam is fair. AQI, NO2, and O3 are fair; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 6:00 AM (NO2: 28.5/100).
Tomorrow (17 July 2026): Air quality in Leidschendam is fair. All pollutants stay as today. Pollution peaks around 5:00 PM (O3: 34.0/100). Airmine updates local air quality forecasts four times daily.
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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Leidschendam carries the profile of a canal town between two cities in Zuid-Holland, which shows up in its air quality, as the A4 corridor and area businesses supply most of the local pollution load. With the Vliet canal close by supporting air movement, and the polder land between Leiden and The Hague shaping the local climate, conditions generally track the wider Dutch average.
Today - 16 July | Pollution peaks at 06:00
AQI:
Fair
28.5/100
PM2.5 (fine particles):
Good
9.1/100
PM10 (coarse particles):
Good
3.0/100
NO2 (nitrogen dioxide):
Fair
28.5/100
O3 (ozone):
Fair
23.9/100
SO2 (sulfur dioxide):
Good
2.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
2.5/100
PM1 (ultrafine particles):
Good
8.5/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 17:00
AQI:
Fair
34.0/100
PM2.5 (fine particles):
Good
12.1/100
PM10 (coarse particles):
Good
4.4/100
NO2 (nitrogen dioxide):
Fair
25.9/100
O3 (ozone):
Fair
34.0/100
SO2 (sulfur dioxide):
Good
2.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
2.1/100
PM1 (ultrafine particles):
Good
9.0/100
Pollen forecast in Leidschendam
View pollen forecastFrequently Asked Questions
Is air quality bad in Leidschendam right now?
On 16 July 2026, overall air quality in Leidschendam is fair. AQI is the main air quality indicator at 28.5/100. Pollution peaks around 6:00 AM (NO2: 28.5/100).
Will air quality be worse tomorrow in Leidschendam?
On 17 July 2026, air quality conditions in Leidschendam will be similar to today, with AQI forecast at fair at 34.0/100. Pollution peaks around 5:00 PM (O3: 34.0/100).
When is air pollution at its worst in Leidschendam?
Around Leidschendam, the clearest air quality dips tend to come when birch, oak, and alder pollen peaks during spring and the start of summer, or on calm, warm days when traffic on the A4 and local industry emissions accumulate; the flat polder terrain and sea proximity generally support decent air movement. Most weeks outside these periods bring Leidschendam conditions close to the broader Dutch norm.
Are air quality levels in Leidschendam based on measurements or forecasts?
It is forecasts derived by downscaling forecasts provided by EU’s Copernicus Atmosphere Monitoring Service (CAMS) by taking into account local conditions such as traffic patterns. CAMS bases its forecast on satellite measurements of particles and chemical compounds in the atmosphere. Airmine’s services were developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team.
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Data provided by Airmine — Last update: 16 July 2026 at 10:33 CEST (Data is updated four times daily.)
This forecast is produced independently using Airmine's own atmospheric data and models.
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
For long term forecasts and maps, see the Airmine app