Worst air pollution Katlehong, today and tomorrow
Today (9 August): Air quality in Katlehong is poor. AQI, HCHO, and PM1 are poor; PM10 is fair; PM2.5 and O3 are medium; NO2, SO2, and CO are good. Pollution peaks around 2:00 AM (HCHO: 68.2/100).
Tomorrow (10 August 2026): Air quality in Katlehong is fair. AQI improves to fair; PM2.5 increases to fair; PM10 decreases to good; O3 increases to fair; HCHO decreases to fair; PM1 decreases to fair; all other pollutants stay as today. Pollution peaks around 9:00 AM (PM1: 30.8/100). 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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Katlehong's air quality faces serious challenges as part of the East Rand industrial corridor east of Johannesburg, with heavy industry, vehicle traffic on the N3 highway, and residential coal and wood burning in informal settlements generating elevated PM2.5. Winter Highveld inversions concentrate emissions across the low-lying East Rand corridor, and this densely populated township records some of Gauteng's highest residential pollution exposure during the dry season.
Today - 9 August | Pollution peaks at 02:00
AQI:
Poor
68.2/100
PM2.5 (fine particles):
Medium
56.5/100
PM10 (coarse particles):
Fair
29.2/100
NO2 (nitrogen dioxide):
Good
10.5/100
O3 (ozone):
Medium
59.8/100
SO2 (sulfur dioxide):
Good
19.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Poor
68.2/100
PM1 (ultrafine particles):
Poor
64.9/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 09:00
AQI:
Fair
30.8/100
PM2.5 (fine particles):
Fair
24.5/100
PM10 (coarse particles):
Good
6.8/100
NO2 (nitrogen dioxide):
Good
3.4/100
O3 (ozone):
Fair
29.2/100
SO2 (sulfur dioxide):
Good
4.9/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Fair
26.8/100
PM1 (ultrafine particles):
Fair
30.8/100
Pollen forecast in Katlehong
View pollen forecastFrequently Asked Questions
Is air quality bad in Katlehong right now?
On 9 August 2026, overall air quality in Katlehong is poor. AQI is the main air quality indicator at 68.2/100. Pollution peaks around 2:00 AM (HCHO: 68.2/100).
Will air quality be worse tomorrow in Katlehong?
On 10 August 2026, air quality conditions in Katlehong will be better than today, with AQI forecast at fair at 30.8/100. Pollution peaks around 9:00 AM (PM1: 30.8/100).
When is air pollution at its worst in Katlehong?
At Katlehong, 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 Katlehong 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: 9 August 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.
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