Worst air pollution Delft - Cape Town, today and tomorrow
Today (20 September): Air quality in Delft is moderate. AQI, PM2.5, PM10, NO2, and PM1 are moderate; O3, SO2, and HCHO are fair; CO is good. Pollution peaks around 4:00 PM (PM1: 55.7/100).
Tomorrow (21 September 2026): Air quality in Delft is moderate. PM10 decreases to fair; O3 decreases to good; all other pollutants stay as today. Pollution peaks around 10:00 PM (PM1: 58.7/100). 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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Delft lies roughly 20 km east-southeast of Cape Town. Air quality at Delft is generally favourable thanks to the Cape's characteristically windy climate, with the southeasterly wind providing strong natural ventilation through much of the year. Vehicle traffic and the city bowl, harbour, and southern suburbs contribute the main local emissions, occasionally noticeable on still winter mornings. This mirrors what's typical for towns across the wider Cape region.
Today - 20 September | Pollution peaks at 16:00
AQI:
Moderate
55.7/100
PM2.5 (fine particles):
Moderate
53.6/100
PM10 (coarse particles):
Moderate
41.5/100
NO2 (nitrogen dioxide):
Moderate
41.0/100
O3 (ozone):
Fair
26.3/100
SO2 (sulfur dioxide):
Fair
24.1/100
CO (carbon monoxide):
Good
1.4/100
HCHO (formaldehyde):
Fair
30.0/100
PM1 (ultrafine particles):
Moderate
55.7/100
Levels show the poorest local air quality during the day
Tomorrow - 21 September | Pollution peaks at 22:00
AQI:
Moderate
58.7/100
PM2.5 (fine particles):
Moderate
51.2/100
PM10 (coarse particles):
Fair
38.5/100
NO2 (nitrogen dioxide):
Moderate
57.5/100
O3 (ozone):
Good
19.0/100
SO2 (sulfur dioxide):
Fair
39.0/100
CO (carbon monoxide):
Good
2.3/100
HCHO (formaldehyde):
Fair
31.0/100
PM1 (ultrafine particles):
Moderate
58.7/100
Other Landmarks in Cape Town
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Frequently Asked Questions
Is air quality bad in Delft right now?
On 20 September 2026, overall air quality in Delft is moderate. AQI is the main air quality indicator at 55.7/100. Pollution peaks around 4:00 PM (PM1: 55.7/100).
Will air quality be worse tomorrow in Delft?
On 21 September 2026, air quality conditions in Delft will be similar to today, with AQI forecast at moderate at 58.7/100. Pollution peaks around 10:00 PM (PM1: 58.7/100).
When is air pollution at its worst in Delft?
The rare still winter morning brings the worst air quality to Delft, as emissions from the city bowl, harbour, and southern suburbs linger without the Cape's characteristic wind to clear them. Spring and summer typically see the southeasterly return, keeping conditions consistently well ventilated across the region, a seasonal pattern typical of the wider Cape region.
Are air quality levels in Delft 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 20:27 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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