Worst air pollution Merredin, today and tomorrow
Today (4 August): Air quality in Merredin is good. AQI, PM2.5, PM10, NO2, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 4:00 PM (O3: 16.4/100).
Tomorrow (5 August 2026): Air quality in Merredin is fair. AQI worsens to fair; NO2 increases to fair; all other pollutants stay as today. Pollution peaks around 7:00 AM (NO2: 21.5/100). 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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Merredin sits deep in the Western Australian Wheatbelt, where dust is overwhelmingly the dominant air quality issue, generated by extensive dry cropping and grazing land that lifts readily in strong winds, particularly during cultivation and harvest. Humidity is low year-round, and bushfire smoke is a lesser but real summer risk from surrounding native bushland remnants. There is no significant industry in the town. Away from dust events, background air quality is excellent, consistent with this dry inland agricultural region.
Today - 4 August | Pollution peaks at 16:00
AQI:
Good
16.4/100
PM2.5 (fine particles):
Good
8.4/100
PM10 (coarse particles):
Good
2.7/100
NO2 (nitrogen dioxide):
Good
14.4/100
O3 (ozone):
Good
16.4/100
SO2 (sulfur dioxide):
Good
1.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
2.3/100
PM1 (ultrafine particles):
Good
8.9/100
Levels show the poorest local air quality during the day
Tomorrow - 5 August | Pollution peaks at 07:00
AQI:
Fair
21.5/100
PM2.5 (fine particles):
Good
13.8/100
PM10 (coarse particles):
Good
4.2/100
NO2 (nitrogen dioxide):
Fair
21.5/100
O3 (ozone):
Good
18.2/100
SO2 (sulfur dioxide):
Good
2.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.1/100
PM1 (ultrafine particles):
Good
16.2/100
Pollen forecast in Merredin
View pollen forecastFrequently Asked Questions
Is air quality bad in Merredin right now?
On 4 August 2026, overall air quality in Merredin is good. AQI is the main air quality indicator at 16.4/100. Pollution peaks around 4:00 PM (O3: 16.4/100).
Will air quality be worse tomorrow in Merredin?
On 5 August 2026, air quality conditions in Merredin will be worse than today, with AQI forecast at fair at 21.5/100. Pollution peaks around 7:00 AM (NO2: 21.5/100).
When is air pollution at its worst in Merredin?
Merredin's inland wheatbelt position, beyond the reach of the coast's cooling sea breezes, makes dust storms during hot, dry, windy spells (spring through summer) the main air-quality concern, particularly around harvest time. Bushfire smoke can add haze after wetter years produce more fuel. Otherwise, expect clear rural skies.
Are air quality levels in Merredin 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: 4 August 2026 at 16:38 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.
For long term forecasts and maps, see the Airmine app