Worst air pollution Old City Quarter - Nanaimo, today and tomorrow
Today (30 August): Air quality in Old City Quarter is good. AQI, PM2.5, PM10, NO2, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 9:00 AM (O3: 19.3/100).
Tomorrow (31 August 2026): Air quality in Old City Quarter is fair. AQI worsens to fair; NO2 increases to fair; O3 increases to fair; all other pollutants stay as today. Pollution peaks around 11:00 PM (NO2: 33.7/100). 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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Old City Quarter's air quality benefits from Georgia Strait sea breezes, with harbourfront ferry-terminal traffic the modest primary local source.
Today - 30 August | Pollution peaks at 09:00
AQI:
Good
19.3/100
PM2.5 (fine particles):
Good
6.5/100
PM10 (coarse particles):
Good
2.4/100
NO2 (nitrogen dioxide):
Good
18.6/100
O3 (ozone):
Good
19.3/100
SO2 (sulfur dioxide):
Good
3.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.6/100
PM1 (ultrafine particles):
Good
4.2/100
Levels show the poorest local air quality during the day
Tomorrow - 31 August | Pollution peaks at 23:00
AQI:
Fair
33.7/100
PM2.5 (fine particles):
Good
11.4/100
PM10 (coarse particles):
Good
4.7/100
NO2 (nitrogen dioxide):
Fair
33.7/100
O3 (ozone):
Fair
23.6/100
SO2 (sulfur dioxide):
Good
4.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.4/100
PM1 (ultrafine particles):
Good
4.0/100
Other Landmarks in Nanaimo
Sports venues in Nanaimo
Frequently Asked Questions
Is air quality bad in Old City Quarter right now?
On 30 August 2026, overall air quality in Old City Quarter is good. AQI is the main air quality indicator at 19.3/100. Pollution peaks around 9:00 AM (O3: 19.3/100).
Will air quality be worse tomorrow in Old City Quarter?
On 31 August 2026, air quality conditions in Old City Quarter will be worse than today, with AQI forecast at fair at 33.7/100. Pollution peaks around 11:00 PM (NO2: 33.7/100).
When is air pollution at its worst in Old City Quarter?
The Old City Quarter's air quality varies through the year, influenced by its historic harbourside streets in downtown Nanaimo. Winter brings frequent rain that keeps the air clean and washed, while summer's drier stretches can occasionally trap traffic emissions and, in bad wildfire years, smoke drifting in from the BC Interior. Frequent Pacific storms during the cooler months usually clear the air completely within a day.
Are air quality levels in Old City Quarter 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: 30 August 2026 at 20:26 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.
Some text on this page may be generated or summarised using artificial intelligence (AI). Wherever possible, AI-generated content is enriched with Airmine's proprietary data to improve its accuracy and relevance. However, AI-generated content may still contain errors, omissions, or inaccuracies.
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