Worst air pollution Rideau Gardens - Ottawa, today and tomorrow
Today (24 August): Air quality in Rideau Gardens is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 11:00 AM (O3: 28.4/100).
Tomorrow (25 August 2026): Air quality in Rideau Gardens is fair. NO2 increases to fair; all other pollutants stay as today. Pollution peaks around 11:00 PM (NO2: 26.0/100). 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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In Rideau Gardens, road traffic and general city density are the leading contributors to particulate matter and nitrogen dioxide here. This is partly offset by nearby tree cover, which filters out some particulate matter naturally. 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 - 24 August | Pollution peaks at 11:00
AQI:
Fair
28.4/100
PM2.5 (fine particles):
Good
5.3/100
PM10 (coarse particles):
Good
2.0/100
NO2 (nitrogen dioxide):
Good
13.2/100
O3 (ozone):
Fair
28.4/100
SO2 (sulfur dioxide):
Good
2.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.6/100
PM1 (ultrafine particles):
Good
4.4/100
Levels show the poorest local air quality during the day
Tomorrow - 25 August | Pollution peaks at 23:00
AQI:
Fair
26.0/100
PM2.5 (fine particles):
Good
6.0/100
PM10 (coarse particles):
Good
2.1/100
NO2 (nitrogen dioxide):
Fair
26.0/100
O3 (ozone):
Fair
25.2/100
SO2 (sulfur dioxide):
Good
1.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
6.2/100
PM1 (ultrafine particles):
Good
4.8/100
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Frequently Asked Questions
Is air quality bad in Rideau Gardens right now?
On 24 August 2026, overall air quality in Rideau Gardens is fair. AQI is the main air quality indicator at 28.4/100. Pollution peaks around 11:00 AM (O3: 28.4/100).
Will air quality be worse tomorrow in Rideau Gardens?
On 25 August 2026, air quality conditions in Rideau Gardens will be similar to today, with AQI forecast at fair at 26.0/100. Pollution peaks around 11:00 PM (NO2: 26.0/100).
When is air pollution at its worst in Rideau Gardens?
The heart of winter usually marks the low point for air quality across this urban stretch, as heavy heating demand and traffic emissions combine under still, cold air that traps pollutants close to the ground. Summer shifts the concern toward ground-level ozone across the city, as urban heat islands amplify the ozone-forming reaction between sunlight and vehicle emissions.
Are air quality levels in Rideau Gardens 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: 25 August 2026 at 02:28 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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