Worst air pollution Middelburg, today and tomorrow
Today (20 September): Air quality in Middelburg is moderate. AQI, PM2.5, and PM1 are moderate; NO2 and O3 are fair; PM10, SO2, CO, and HCHO are good. Pollution peaks around 10:00 PM (PM1: 41.8/100).
Tomorrow (21 September 2026): Air quality in Middelburg is poor. AQI worsens to poor; PM10 increases to fair; NO2 increases to poor; SO2 increases to moderate; all other pollutants stay as today. Pollution peaks around 2:00 PM (NO2: 71.1/100). Airmine updates local air quality forecasts four times daily.
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Middelburg's air quality reflects the Mpumalanga Highveld coal region at around 1,500 metres, with vehicle traffic on the N4 and N11 and the surrounding coal mining and Steel Valley industrial operations, including the Columbus Stainless steelworks, generating elevated PM2.5 and SO₂. Winter Highveld temperature inversions concentrate emissions across the plateau, while summer thunderstorms and stronger winds generally aid dispersal.
Today - 20 September | Pollution peaks at 22:00
AQI:
Moderate
41.8/100
PM2.5 (fine particles):
Moderate
40.2/100
PM10 (coarse particles):
Good
15.9/100
NO2 (nitrogen dioxide):
Fair
28.3/100
O3 (ozone):
Fair
20.2/100
SO2 (sulfur dioxide):
Good
6.0/100
CO (carbon monoxide):
Good
0.8/100
HCHO (formaldehyde):
Good
4.2/100
PM1 (ultrafine particles):
Moderate
41.8/100
Levels show the poorest local air quality during the day
Tomorrow - 21 September | Pollution peaks at 14:00
AQI:
Poor
71.1/100
PM2.5 (fine particles):
Moderate
44.4/100
PM10 (coarse particles):
Fair
21.8/100
NO2 (nitrogen dioxide):
Poor
71.1/100
O3 (ozone):
Fair
22.6/100
SO2 (sulfur dioxide):
Moderate
42.9/100
CO (carbon monoxide):
Good
0.9/100
HCHO (formaldehyde):
Good
5.5/100
PM1 (ultrafine particles):
Moderate
47.6/100
Pollen forecast in Middelburg
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Frequently Asked Questions
Is air quality bad in Middelburg right now?
On 20 September 2026, overall air quality in Middelburg is moderate. AQI is the main air quality indicator at 41.8/100. Pollution peaks around 10:00 PM (PM1: 41.8/100).
Will air quality be worse tomorrow in Middelburg?
On 21 September 2026, air quality conditions in Middelburg will be worse than today, with AQI forecast at poor at 71.1/100. Pollution peaks around 2:00 PM (NO2: 71.1/100).
When is air pollution at its worst in Middelburg?
At Middelburg, the poorest air quality usually occurs on still winter mornings from May to August, when smoke and vehicle emissions accumulate under a low temperature inversion typical of the Highveld plateau. From November onward, summer rains and afternoon winds generally restore clearer conditions that last through much of the warmer part of the year.
Are air quality levels in Middelburg 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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