Withers, Bunbury Air Quality Forecast - Today, Tomorrow
Air Quality Today
Today (11 October): Air quality in Withers is fair. AQI and PM2.5 are fair; PM10, NO2, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 4:00 AM (PM2.5: 25.4/100).
Air Quality Tomorrow
Tomorrow (12 October 2026): Air quality in Withers is good. AQI improves to good; PM2.5 decreases to good; all other pollutants stay as today. Pollution peaks around 7:00 AM (PM2.5: 18.3/100).
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Air Quality
Today - 11 October
| Pollutant | Level | Value |
|---|---|---|
| AQI | Fair | 25.4/100 |
| PM2.5 (fine particles) | Fair | 25.4/100 |
| PM10 (coarse particles) | Good | 15.4/100 |
| NO2 (nitrogen dioxide) | Good | 2.8/100 |
| O3 (ozone) | Good | 17.9/100 |
| SO2 (sulfur dioxide) | Good | 0.6/100 |
| CO (carbon monoxide) | Good | 0.2/100 |
| HCHO (formaldehyde) | Good | 1.3/100 |
| PM1 (ultrafine particles) | Good | 3.3/100 |
Tomorrow - 12 October
| Pollutant | Level | Value |
|---|---|---|
| AQI | Good | 18.3/100 |
| PM2.5 (fine particles) | Good | 18.3/100 |
| PM10 (coarse particles) | Good | 11.6/100 |
| NO2 (nitrogen dioxide) | Good | 7.5/100 |
| O3 (ozone) | Good | 17.0/100 |
| SO2 (sulfur dioxide) | Good | 1.2/100 |
| CO (carbon monoxide) | Good | 0.3/100 |
| HCHO (formaldehyde) | Good | 2.5/100 |
| PM1 (ultrafine particles) | Good | 2.8/100 |
Local Environmental Conditions
This location in Bunbury is largely built up, so vehicle exhaust and urban activity dominate the local air pollution sources. Sea breezes along the coast usually help ventilate the area. Port and shipping activity adds to local emissions. Pockets of trees and green space help filter a small share of the particles from traffic. Pollution carried in from the wider region can also raise levels at times.
Air near roads is often at its worst from June to August, when nights cool to around 13°C and the air turns still. In the warmer months, ozone is the main concern from December to March, when sunny days averaging 24°C turn traffic and other emissions into ozone by mid-afternoon. Breezy weather in January, with winds near 20 km/h, tends to sweep pollution away.
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Frequently Asked Questions About Air Quality in Western Australia
Is air quality bad in Withers right now?
On 11 October 2026, overall air quality in Withers is fair. AQI is the main air quality indicator at 25.4/100. Pollution peaks around 4:00 AM (PM2.5: 25.4/100).
Will air quality be worse tomorrow in Withers?
On 12 October 2026, air quality conditions in Withers will be better than today, with AQI forecast at good at 18.3/100. Pollution peaks around 7:00 AM (PM2.5: 18.3/100).
When is air pollution at its worst in Withers?
Air near roads is often at its worst from June to August, when nights cool to around 13°C and the air turns still. In the warmer months, ozone is the main concern from December to March, when sunny days averaging 24°C turn traffic and other emissions into ozone by mid-afternoon. Breezy weather in January, with winds near 20 km/h, tends to sweep pollution away.
Are air quality levels in Withers 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.
Understanding the Scale
The 0–100 air quality scores represent risk levels, not direct air pollutant concentrations. Higher scores indicate higher risk.
Air Quality
| Good | 0-20 | Low air quality risk. Air quality is expected to be good, with low levels of pollution. |
| Fair | 20-40 | Generally low air quality risk. Air quality is expected to be acceptable, with some pollution present. |
| Moderate | 40-60 | Moderate air quality risk. Air pollution is elevated and air quality may be less favorable. |
| Poor | 60-80 | High air quality risk. Air pollution is high and air quality is expected to be poor. |
| Very Poor | 80-100 | Very high air quality risk. Air pollution is very high and air quality is expected to be very poor. |