Worst air pollution Nepean, today and tomorrow
Today (9 August): Air quality in Nepean is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 10:00 AM (O3: 37.4/100).
Tomorrow (10 August 2026): Air quality in Nepean is fair. All pollutants stay as today. Pollution peaks around 11:00 AM (O3: 34.1/100). Airmine updates local air quality forecasts four times daily.
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In Nepean, with vehicle traffic relatively low, dust from nearby fields and occasional burning are the bigger day-to-day factors. Tree cover nearby helps soften the local particulate load to a degree. Daily conditions can shift noticeably depending on wind, temperature, and traffic patterns. This general baseline tends to hold across nearby areas with similar traffic and land use.
Today - 9 August | Pollution peaks at 10:00
AQI:
Fair
37.4/100
PM2.5 (fine particles):
Good
8.2/100
PM10 (coarse particles):
Good
4.9/100
NO2 (nitrogen dioxide):
Good
14.8/100
O3 (ozone):
Fair
37.4/100
SO2 (sulfur dioxide):
Good
1.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
8.9/100
PM1 (ultrafine particles):
Good
6.0/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 11:00
AQI:
Fair
34.1/100
PM2.5 (fine particles):
Good
9.5/100
PM10 (coarse particles):
Good
6.1/100
NO2 (nitrogen dioxide):
Good
14.7/100
O3 (ozone):
Fair
34.1/100
SO2 (sulfur dioxide):
Good
1.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
7.5/100
PM1 (ultrafine particles):
Good
6.7/100
Pollen forecast in Nepean
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Frequently Asked Questions
Is air quality bad in Nepean right now?
On 9 August 2026, overall air quality in Nepean is fair. AQI is the main air quality indicator at 37.4/100. Pollution peaks around 10:00 AM (O3: 37.4/100).
Will air quality be worse tomorrow in Nepean?
On 10 August 2026, air quality conditions in Nepean will be similar to today, with AQI forecast at fair at 34.1/100. Pollution peaks around 11:00 AM (O3: 34.1/100).
When is air pollution at its worst in Nepean?
The depths of winter usually mark the low point for local air quality, driven by the combination of home heating and calm winter air that resists mixing. Once summer sets in, ground-level ozone becomes the bigger local concern, which forms readily in strong sunlight and heat, and can spike further during wildfire smoke events.
Are air quality levels in Nepean 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: 9 August 2026 at 20:27 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.
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