Worst air pollution Houten, today and tomorrow
Today (20 September): Air quality in Houten is fair. AQI and NO2 are fair; PM2.5, PM10, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 10:00 AM (NO2: 20.3/100).
Tomorrow (21 September 2026): Air quality in Houten is moderate. AQI worsens to moderate; NO2 increases to moderate; all other pollutants stay as today. Pollution peaks around 10:00 AM (NO2: 41.0/100). Airmine updates local air quality forecasts four times daily.
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Houten's air quality reflects the flat Gelderse Vallei position east of Utrecht, with vehicle traffic on the A27 motorway and surrounding residential and logistics character contributing local sources. North Sea westerlies carry relatively clean Atlantic air, while the Utrechtse Heuvelrug's forested ridge to the north provides some clean-air buffering and the flat Dutch river valley terrain generally maintains Houten at moderate Dutch suburban air quality levels throughout the year.
Today - 20 September | Pollution peaks at 10:00
AQI:
Fair
20.3/100
PM2.5 (fine particles):
Good
19.7/100
PM10 (coarse particles):
Good
19.7/100
NO2 (nitrogen dioxide):
Fair
20.3/100
O3 (ozone):
Good
18.3/100
SO2 (sulfur dioxide):
Good
1.4/100
CO (carbon monoxide):
Good
0.7/100
HCHO (formaldehyde):
Good
1.6/100
PM1 (ultrafine particles):
Good
2.4/100
Levels show the poorest local air quality during the day
Tomorrow - 21 September | Pollution peaks at 10:00
AQI:
Moderate
41.0/100
PM2.5 (fine particles):
Good
19.8/100
PM10 (coarse particles):
Good
17.4/100
NO2 (nitrogen dioxide):
Moderate
41.0/100
O3 (ozone):
Good
16.6/100
SO2 (sulfur dioxide):
Good
1.9/100
CO (carbon monoxide):
Good
0.9/100
HCHO (formaldehyde):
Good
2.4/100
PM1 (ultrafine particles):
Good
4.8/100
Pollen forecast in Houten
View pollen forecastFrequently Asked Questions
Is air quality bad in Houten right now?
On 20 September 2026, overall air quality in Houten is fair. AQI is the main air quality indicator at 20.3/100. Pollution peaks around 10:00 AM (NO2: 20.3/100).
Will air quality be worse tomorrow in Houten?
On 21 September 2026, air quality conditions in Houten will be worse than today, with AQI forecast at moderate at 41.0/100. Pollution peaks around 10:00 AM (NO2: 41.0/100).
When is air pollution at its worst in Houten?
Houten tends to see its biggest air quality dips during spring and the start of summer, when birch, oak, and pine pollen peaks, or on still, warm days when traffic on the A27 and industry emissions linger; nearby forest and open polder generally keep conditions reasonable. Most weeks outside these periods bring Houten conditions close to the broader Dutch norm.
Are air quality levels in Houten 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.
Why doesn’t the forecast always reflect wildfire impacts?
Airmine’s forecast uses CAMS (Copernicus Atmosphere Monitoring Service) as its background atmospheric model. While CAMS includes wildfire emissions, these are derived from satellite observations and are not available in real time. During rapidly evolving wildfire events, there may therefore be a delay before increased emissions are incorporated into the model. As a result, the forecast may temporarily underestimate PM₂.₅ and other pollutants associated with wildfire smoke.
During rapidly evolving wildfire events, CAMS may lag by approximately 1–2 days before increased wildfire emissions are fully represented, which can lead to temporary underestimation of PM₂.₅ concentrations in Airmine’s forecast.
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Data provided by Airmine — Last update: 20 September 2026 at 14:33 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.
Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.
Some text on this page may be generated or summarised using artificial intelligence (AI). Wherever possible, AI-generated content is enriched with Airmine's proprietary data to improve its accuracy and relevance. However, AI-generated content may still contain errors, omissions, or inaccuracies.
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