Worst air pollution Erasmuskloof - Pretoria, today and tomorrow
Today (9 August): Air quality in Erasmuskloof is fair. PM2.5, HCHO, and PM1 are fair; AQI and O3 are medium; PM10, NO2, SO2, and CO are good. Pollution peaks around 2:00 PM (O3: 41.9/100).
Tomorrow (10 August 2026): Air quality in Erasmuskloof is fair. AQI worsens to fair; PM2.5 decreases to good; O3 increases to fair; PM1 decreases to good; all other pollutants stay as today. Pollution peaks around 3:00 PM (O3: 26.5/100). Airmine updates local air quality forecasts four times daily.
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Erasmuskloof lies roughly 50 km north-northeast of Johannesburg. Vehicle traffic and government, finance, and commercial operations together shape most of what happens to air quality at Erasmuskloof, sitting as it does on the open Highveld plateau. Winter's still, cold mornings are when the two combine most noticeably, before summer's stronger winds take over and clear things out. This is roughly what you'd expect anywhere on the open plateau.
Today - 9 August | Pollution peaks at 14:00
AQI:
Medium
41.9/100
PM2.5 (fine particles):
Fair
23.1/100
PM10 (coarse particles):
Good
6.3/100
NO2 (nitrogen dioxide):
Good
2.9/100
O3 (ozone):
Medium
41.9/100
SO2 (sulfur dioxide):
Good
4.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Fair
27.7/100
PM1 (ultrafine particles):
Fair
29.6/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 15:00
AQI:
Fair
26.5/100
PM2.5 (fine particles):
Good
11.1/100
PM10 (coarse particles):
Good
3.0/100
NO2 (nitrogen dioxide):
Good
2.3/100
O3 (ozone):
Fair
26.5/100
SO2 (sulfur dioxide):
Good
3.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Fair
20.1/100
PM1 (ultrafine particles):
Good
15.3/100
Other Landmarks in Pretoria
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Frequently Asked Questions
Is air quality bad in Erasmuskloof right now?
On 9 August 2026, overall air quality in Erasmuskloof is fair. PM1 is the main pollutant at 29.6/100. Pollution peaks around 2:00 PM (O3: 41.9/100).
Will air quality be worse tomorrow in Erasmuskloof?
On 10 August 2026, air quality conditions in Erasmuskloof will be similar to today, with AQI forecast at fair at 26.5/100. Pollution peaks around 3:00 PM (O3: 26.5/100).
When is air pollution at its worst in Erasmuskloof?
Ask anyone at Erasmuskloof and they'll say winter mornings are when the air is at its worst, as government, finance, and commercial operations and local traffic emissions sit trapped under a still, cold inversion layer. Spring and summer bring the wind and rain that usually clears things up again. This is a familiar pattern across much of the Highveld.
Are air quality levels in Erasmuskloof 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: 10 August 2026 at 02:34 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.
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