Lower Portland, Hawkesbury City Council Air Quality Forecast - Today, Tomorrow
Air Quality Today
Today (10 October): Air quality in Lower Portland is fair. AQI, PM2.5, and PM10 are fair; NO2, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 11:00 AM (PM2.5: 31.8/100).
Air Quality Tomorrow
Tomorrow (11 October 2026): Air quality in Lower Portland is fair. O3 increases to fair; all other pollutants stay as today. Pollution peaks around 10:00 AM (PM2.5: 39.8/100).
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Air Quality
Today - 10 October
| Pollutant | Level | Value |
|---|---|---|
| AQI | Fair | 31.8/100 |
| PM2.5 (fine particles) | Fair | 31.8/100 |
| PM10 (coarse particles) | Fair | 28.3/100 |
| NO2 (nitrogen dioxide) | Good | 19.0/100 |
| O3 (ozone) | Good | 18.2/100 |
| SO2 (sulfur dioxide) | Good | 2.5/100 |
| CO (carbon monoxide) | Good | 0.5/100 |
| HCHO (formaldehyde) | Good | 12.6/100 |
| PM1 (ultrafine particles) | Good | 7.7/100 |
Tomorrow - 11 October
| Pollutant | Level | Value |
|---|---|---|
| AQI | Fair | 39.8/100 |
| PM2.5 (fine particles) | Fair | 39.8/100 |
| PM10 (coarse particles) | Fair | 22.1/100 |
| NO2 (nitrogen dioxide) | Good | 15.4/100 |
| O3 (ozone) | Fair | 24.5/100 |
| SO2 (sulfur dioxide) | Good | 5.3/100 |
| CO (carbon monoxide) | Good | 0.5/100 |
| HCHO (formaldehyde) | Good | 13.3/100 |
| PM1 (ultrafine particles) | Good | 6.7/100 |
Local Environmental Conditions
Around this location in Hawkesbury City Council, traffic is light and there are few concentrated sources of air pollution. Trees nearby help filter some particles from the air, though in hot weather they also emit compounds that feed ozone formation. Light average winds mean local emissions are not always carried away quickly. On some days, pollution drifting in from farther away outweighs local sources.
Hot afternoons from December to March, averaging 22°C in the warmest month, are when ozone is most likely to build up. Fine particle levels climb from June to August, as wood burning and traffic combine with cold, still air averaging 10°C. On any given day, wind and rain matter most: breezy or wet weather disperses pollution, while calm, dry spells let it build.
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Frequently Asked Questions About Air Quality in New South Wales
Is air quality bad in Lower Portland right now?
On 10 October 2026, overall air quality in Lower Portland is fair. AQI is the main air quality indicator at 31.8/100. Pollution peaks around 11:00 AM (PM2.5: 31.8/100).
Will air quality be worse tomorrow in Lower Portland?
On 11 October 2026, air quality conditions in Lower Portland will be similar to today, with AQI forecast at fair at 39.8/100. Pollution peaks around 10:00 AM (PM2.5: 39.8/100).
When is air pollution at its worst in Lower Portland?
Hot afternoons from December to March, averaging 22°C in the warmest month, are when ozone is most likely to build up. Fine particle levels climb from June to August, as wood burning and traffic combine with cold, still air averaging 10°C. On any given day, wind and rain matter most: breezy or wet weather disperses pollution, while calm, dry spells let it build.
Are air quality levels in Lower Portland 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. |