Worst air pollution Grand Falls-Windsor, today and tomorrow
Today (16 July): Air quality in Grand Falls-Windsor is medium. AQI and O3 are medium; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 9:30 AM (O3: 49.1/100).
Tomorrow (17 July 2026): Air quality in Grand Falls-Windsor is fair. AQI worsens to fair; O3 increases to fair; all other pollutants stay as today. Pollution peaks around 10:30 AM (O3: 35.0/100). 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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Grand Falls-Windsor's air quality reflects its legacy pulp-mill industry along the Exploits River, with the closed mill site's remediation reducing historic local emissions.
Today - 16 July | Pollution peaks at 09:30
AQI:
Medium
49.1/100
PM2.5 (fine particles):
Good
8.9/100
PM10 (coarse particles):
Good
3.0/100
NO2 (nitrogen dioxide):
Good
11.2/100
O3 (ozone):
Medium
49.1/100
SO2 (sulfur dioxide):
Good
1.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
6.8/100
PM1 (ultrafine particles):
Good
10.4/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 10:30
AQI:
Fair
35.0/100
PM2.5 (fine particles):
Good
9.0/100
PM10 (coarse particles):
Good
2.9/100
NO2 (nitrogen dioxide):
Good
19.1/100
O3 (ozone):
Fair
35.0/100
SO2 (sulfur dioxide):
Good
2.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.2/100
PM1 (ultrafine particles):
Good
9.1/100
Frequently Asked Questions
Is air quality bad in Grand Falls-Windsor right now?
On 16 July 2026, overall air quality in Grand Falls-Windsor is medium. AQI is the main air quality indicator at 49.1/100. Pollution peaks around 9:30 AM (O3: 49.1/100).
Will air quality be worse tomorrow in Grand Falls-Windsor?
On 17 July 2026, air quality conditions in Grand Falls-Windsor will be worse than today, with AQI forecast at fair at 35.0/100. Pollution peaks around 10:30 AM (O3: 35.0/100).
When is air pollution at its worst in Grand Falls-Windsor?
Grand Falls-Windsor's air quality varies through the year, influenced by its pulp-and-paper mill in central Newfoundland. For much of the year the air is clean and forest-fresh, but summer and early autumn carry real risk of smoke episodes when wildfires burn nearby or further north. Wind direction across the river determines how much of the industrial output drifts into town on any given day.
Are air quality levels in Grand Falls-Windsor 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