Worst air pollution Thaba Nchu, today and tomorrow
Today (9 August): Air quality in Thaba Nchu is fair. AQI, O3, and PM1 are fair; PM2.5, PM10, NO2, SO2, CO, and HCHO are good. Pollution peaks around 2:00 PM (O3: 39.0/100).
Tomorrow (10 August 2026): Air quality in Thaba Nchu is good. AQI improves to good; O3 decreases to good; PM1 decreases to good; all other pollutants stay as today. Pollution peaks around 6:00 AM (O3: 16.4/100). Airmine updates local air quality forecasts four times daily.
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Thaba Nchu's air quality reflects the Free State highland position at 1,410 metres near the Lesotho border, with vehicle dust from roads and surrounding maize farming and residential biomass burning contributing the primary local PM10 and PM2.5 sources. The elevated semi-arid Highveld position aids background dispersal on most days, while winter Highveld inversions can concentrate agricultural dust and residential burning emissions across the rural Free State highland plateau.
Today - 9 August | Pollution peaks at 14:00
AQI:
Fair
39.0/100
PM2.5 (fine particles):
Good
15.5/100
PM10 (coarse particles):
Good
4.1/100
NO2 (nitrogen dioxide):
Good
0/100
O3 (ozone):
Fair
39.0/100
SO2 (sulfur dioxide):
Good
0/100
CO (carbon monoxide):
Good
0/100
HCHO (formaldehyde):
Good
6.2/100
PM1 (ultrafine particles):
Fair
21.3/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 06:00
AQI:
Good
16.4/100
PM2.5 (fine particles):
Good
6.7/100
PM10 (coarse particles):
Good
1.9/100
NO2 (nitrogen dioxide):
Good
0/100
O3 (ozone):
Good
16.4/100
SO2 (sulfur dioxide):
Good
0/100
CO (carbon monoxide):
Good
0/100
HCHO (formaldehyde):
Good
6.8/100
PM1 (ultrafine particles):
Good
9.1/100
Pollen forecast in Thaba Nchu
View pollen forecastFrequently Asked Questions
Is air quality bad in Thaba Nchu right now?
On 9 August 2026, overall air quality in Thaba Nchu is fair. AQI is the main air quality indicator at 39.0/100. Pollution peaks around 2:00 PM (O3: 39.0/100).
Will air quality be worse tomorrow in Thaba Nchu?
On 10 August 2026, air quality conditions in Thaba Nchu will be better than today, with AQI forecast at good at 16.4/100. Pollution peaks around 6:00 AM (O3: 16.4/100).
When is air pollution at its worst in Thaba Nchu?
At Thaba Nchu, 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 Thaba Nchu 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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