D3 684, Seymour Air Quality Forecast - Today, Tomorrow
Air Quality Today
Today (11 October): Air quality in D3 684 is good. AQI, PM2.5, PM10, NO2, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 3:00 PM (O3: 14.5/100).
Air Quality Tomorrow
Tomorrow (12 October 2026): Air quality in D3 684 is good. All pollutants stay as today. Pollution peaks around 11:00 PM (PM2.5: 14.6/100).
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Air Quality
Today - 11 October
| Pollutant | Level | Value |
|---|---|---|
| AQI | Good | 14.5/100 |
| PM2.5 (fine particles) | Good | 11.3/100 |
| PM10 (coarse particles) | Good | 9.3/100 |
| NO2 (nitrogen dioxide) | Good | 5.0/100 |
| O3 (ozone) | Good | 14.5/100 |
| SO2 (sulfur dioxide) | Good | 0.2/100 |
| CO (carbon monoxide) | Good | 0.3/100 |
| HCHO (formaldehyde) | Good | 2.1/100 |
| PM1 (ultrafine particles) | Good | 1.8/100 |
Tomorrow - 12 October
| Pollutant | Level | Value |
|---|---|---|
| AQI | Good | 14.6/100 |
| PM2.5 (fine particles) | Good | 14.6/100 |
| PM10 (coarse particles) | Good | 10.6/100 |
| NO2 (nitrogen dioxide) | Good | 7.5/100 |
| O3 (ozone) | Good | 12.5/100 |
| SO2 (sulfur dioxide) | Good | 1.3/100 |
| CO (carbon monoxide) | Good | 0.3/100 |
| HCHO (formaldehyde) | Good | 2.7/100 |
| PM1 (ultrafine particles) | Good | 4.7/100 |
Local Environmental Conditions
Around this site in Seymour, dense development means road traffic is the main local source of nitrogen dioxide and fine particles. Pockets of trees and green space help filter a small share of the particles from traffic. On some days, pollution drifting in from farther away outweighs local sources. Levels are generally highest right next to busy roads and drop off quickly with distance.
Fine particle levels climb from June to July, as home heating and traffic combine with cold, still air averaging 7°C. In the warmer months, hot afternoons from January to February, averaging 22°C in the warmest month, are when ozone is most likely to build up. Overall, stronger winds around February, about 15 km/h on average, usually bring some of the cleanest air of the year.
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Frequently Asked Questions About Air Quality in Victoria
Is air quality bad in D3 684 right now?
On 11 October 2026, overall air quality in D3 684 is good. AQI is the main air quality indicator at 14.5/100. Pollution peaks around 3:00 PM (O3: 14.5/100).
Will air quality be worse tomorrow in D3 684?
On 12 October 2026, air quality conditions in D3 684 will be similar to today, with AQI forecast at good at 14.6/100. Pollution peaks around 11:00 PM (PM2.5: 14.6/100).
When is air pollution at its worst in D3 684?
Fine particle levels climb from June to July, as home heating and traffic combine with cold, still air averaging 7°C. In the warmer months, hot afternoons from January to February, averaging 22°C in the warmest month, are when ozone is most likely to build up. Overall, stronger winds around February, about 15 km/h on average, usually bring some of the cleanest air of the year.
Are air quality levels in D3 684 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. |