Worst air pollution Pretoria, today and tomorrow
Today (20 September): Air quality in Pretoria is moderate. AQI and PM1 are moderate; PM2.5, NO2, and O3 are fair; PM10, SO2, CO, and HCHO are good. Pollution peaks around 7:00 AM (PM1: 44.0/100).
Tomorrow (21 September 2026): Air quality in Pretoria is very poor. AQI worsens to very poor; PM2.5 increases to poor; PM10 increases to moderate; NO2 increases to poor; SO2 increases to moderate; HCHO increases to moderate; PM1 increases to very poor; all other pollutants stay as today. Pollution peaks around 11:00 PM (PM1: 81.9/100). Airmine updates local air quality forecasts four times daily.
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Pretoria's air quality is significantly impacted by winter air pollution from coal burning in the surrounding Highveld power stations and domestic fires in informal settlements, with the city's enclosed valley topography concentrating emissions during the dry season inversions. Summer rains and thunderstorms provide effective seasonal air washing across the Gauteng plateau.
Today - 20 September | Pollution peaks at 07:00
AQI:
Moderate
44.0/100
PM2.5 (fine particles):
Fair
35.0/100
PM10 (coarse particles):
Good
17.5/100
NO2 (nitrogen dioxide):
Fair
37.4/100
O3 (ozone):
Fair
21.6/100
SO2 (sulfur dioxide):
Good
12.8/100
CO (carbon monoxide):
Good
0.9/100
HCHO (formaldehyde):
Good
19.8/100
PM1 (ultrafine particles):
Moderate
44.0/100
Levels show the poorest local air quality during the day
Tomorrow - 21 September | Pollution peaks at 23:00
AQI:
Very poor
81.9/100
PM2.5 (fine particles):
Poor
61.1/100
PM10 (coarse particles):
Moderate
45.4/100
NO2 (nitrogen dioxide):
Poor
63.8/100
O3 (ozone):
Fair
28.7/100
SO2 (sulfur dioxide):
Moderate
47.1/100
CO (carbon monoxide):
Good
2.8/100
HCHO (formaldehyde):
Moderate
42.8/100
PM1 (ultrafine particles):
Very poor
81.9/100
Pollen forecast in Pretoria
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Frequently Asked Questions
Is air quality bad in Pretoria right now?
On 20 September 2026, overall air quality in Pretoria is moderate. AQI is the main air quality indicator at 44.0/100. Pollution peaks around 7:00 AM (PM1: 44.0/100).
Will air quality be worse tomorrow in Pretoria?
On 21 September 2026, air quality conditions in Pretoria will be worse than today, with AQI forecast at very poor at 81.9/100. Pollution peaks around 11:00 PM (PM1: 81.9/100).
When is air pollution at its worst in Pretoria?
At Pretoria, 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 Pretoria 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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