Worst air pollution Horsham, today and tomorrow
Today (16 July): Air quality in Horsham is fair. PM2.5 and PM1 are fair; AQI and NO2 are medium; PM10, O3, SO2, CO, and HCHO are good. Pollution peaks around 11:00 PM (NO2: 57.9/100).
Tomorrow (17 July 2026): Air quality in Horsham is poor. AQI worsens to poor; PM2.5 decreases to medium; NO2 increases to poor; PM1 decreases to medium; all other pollutants stay as today. Pollution peaks around 11:00 PM (NO2: 61.6/100). Airmine updates local air quality forecasts four times daily.
For long term forecasts and maps, see the Airmine app
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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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 - 16 July | Pollution peaks at 23:00
AQI:
Medium
57.9/100
PM2.5 (fine particles):
Fair
29.6/100
PM10 (coarse particles):
Good
8.7/100
NO2 (nitrogen dioxide):
Medium
57.9/100
O3 (ozone):
Good
15.8/100
SO2 (sulfur dioxide):
Good
8.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
2.5/100
PM1 (ultrafine particles):
Fair
34.3/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 23:00
AQI:
Poor
61.6/100
PM2.5 (fine particles):
Medium
40.2/100
PM10 (coarse particles):
Good
12.1/100
NO2 (nitrogen dioxide):
Poor
61.6/100
O3 (ozone):
Good
15.7/100
SO2 (sulfur dioxide):
Good
10.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.1/100
PM1 (ultrafine particles):
Medium
42.2/100
Frequently Asked Questions
Is air quality bad in Horsham right now?
On 16 July 2026, overall air quality in Horsham is fair. PM1 is the main pollutant at 34.3/100. Pollution peaks around 11:00 PM (NO2: 57.9/100).
Will air quality be worse tomorrow in Horsham?
On 17 July 2026, air quality conditions in Horsham will be worse than today, with AQI forecast at poor at 61.6/100. Pollution peaks around 11:00 PM (NO2: 61.6/100).
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.
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Data provided by Airmine — Last update: 16 July 2026 at 10:33 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.
For long term forecasts and maps, see the Airmine app