Worst air pollution Horsham, today and tomorrow
Today (10 August): Air quality in Horsham is good. AQI, PM2.5, PM10, NO2, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 4:00 PM (O3: 13.3/100).
Tomorrow (11 August 2026): Air quality in Horsham is good. All pollutants stay as today. Pollution peaks around 3:00 PM (O3: 15.1/100). Airmine updates local air quality forecasts four times daily.
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Horsham's cropping-country setting brings notable seasonal dust, particularly during cultivation, spraying and harvest on the surrounding Wimmera plains, though the open, flat terrain generally allows good dispersion. Winter wood-smoke haze settles on cold, still nights, and summer can bring bushfire smoke from the Grampians or Little Desert during dry, high-risk periods. Canola flowering in spring adds a distinctive, sometimes irritating pollen and odour component to local air.
Today - 10 August | Pollution peaks at 16:00
AQI:
Good
13.3/100
PM2.5 (fine particles):
Good
10.0/100
PM10 (coarse particles):
Good
4.2/100
NO2 (nitrogen dioxide):
Good
12.8/100
O3 (ozone):
Good
13.3/100
SO2 (sulfur dioxide):
Good
2.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.8/100
PM1 (ultrafine particles):
Good
3.3/100
Levels show the poorest local air quality during the day
Tomorrow - 11 August | Pollution peaks at 15:00
AQI:
Good
15.1/100
PM2.5 (fine particles):
Good
12.1/100
PM10 (coarse particles):
Good
4.9/100
NO2 (nitrogen dioxide):
Good
12.8/100
O3 (ozone):
Good
15.1/100
SO2 (sulfur dioxide):
Good
4.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.9/100
PM1 (ultrafine particles):
Good
7.6/100
Pollen forecast in Horsham
View pollen forecastFrequently Asked Questions
Is air quality bad in Horsham right now?
On 10 August 2026, overall air quality in Horsham is good. AQI is the main air quality indicator at 13.3/100. Pollution peaks around 4:00 PM (O3: 13.3/100).
Will air quality be worse tomorrow in Horsham?
On 11 August 2026, air quality conditions in Horsham will be similar to today, with AQI forecast at good at 15.1/100. Pollution peaks around 3:00 PM (O3: 15.1/100).
When is air pollution at its worst in Horsham?
Air quality in Horsham dips most during the Wimmera's dry cropping season, when tillage and harvest dust rises across the exposed plains, and canola flowering in spring adds a heavy, distinctive pollen load. Summer bushfire smoke from the Grampians or Little Desert is a secondary concern. Winter's chief issue is a milder wood-smoke haze on frosty, still nights.
Are air quality levels in Horsham 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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