Worst air pollution Downtown Sudbury - Sudbury, today and tomorrow
Today (16 July): Air quality in Downtown Sudbury is fair. NO2 is fair; AQI and O3 are medium; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 7:00 AM (O3: 41.5/100).
Tomorrow (17 July 2026): Air quality in Downtown Sudbury is fair. AQI worsens to fair; NO2 decreases to good; O3 increases to fair; all other pollutants stay as today. Pollution peaks around 11:00 AM (O3: 33.1/100). Airmine updates local air quality forecasts four times daily.
For long term forecasts and maps, see the Airmine app
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Downtown Sudbury's air quality reflects the city's nickel-mining and smelting legacy, though decades of remediation and the retired Superstack's reduced operations have substantially improved local conditions.
Today - 16 July | Pollution peaks at 07:00
AQI:
Medium
41.5/100
PM2.5 (fine particles):
Good
10.5/100
PM10 (coarse particles):
Good
3.6/100
NO2 (nitrogen dioxide):
Fair
24.9/100
O3 (ozone):
Medium
41.5/100
SO2 (sulfur dioxide):
Good
1.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
9.1/100
PM1 (ultrafine particles):
Good
12.0/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 11:00
AQI:
Fair
33.1/100
PM2.5 (fine particles):
Good
6.2/100
PM10 (coarse particles):
Good
2.4/100
NO2 (nitrogen dioxide):
Good
16.4/100
O3 (ozone):
Fair
33.1/100
SO2 (sulfur dioxide):
Good
1.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.0/100
PM1 (ultrafine particles):
Good
7.1/100
Other Landmarks in Sudbury
Frequently Asked Questions
Is air quality bad in Downtown Sudbury right now?
On 16 July 2026, overall air quality in Downtown Sudbury is fair. NO2 is the main pollutant at 24.9/100. Pollution peaks around 7:00 AM (O3: 41.5/100).
Will air quality be worse tomorrow in Downtown Sudbury?
On 17 July 2026, air quality conditions in Downtown Sudbury will be similar to today, with AQI forecast at fair at 33.1/100. Pollution peaks around 11:00 AM (O3: 33.1/100).
When is air pollution at its worst in Downtown Sudbury?
Old Sandwich Town sees clear seasonal swings in air quality, driven in part by its riverside setting near Windsor's oldest streets and industry. Cross-border truck traffic keeps emissions elevated much of the year, with summer heat adding ground-level ozone to the mix; winter usually brings some relief except during cold, still inversions. Wait times at the crossing can worsen local air quality further during peak travel periods.
Are air quality levels in Downtown Sudbury 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.
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Data provided by Airmine — Last update: 16 July 2026 at 10:33 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.
For long term forecasts and maps, see the Airmine app