Worst air pollution Sundsvall, today and tomorrow
Today (16 July): Air quality in Sundsvall is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 3:00 PM (O3: 22.6/100).
Tomorrow (17 July 2026): Air quality in Sundsvall is fair. All pollutants stay as today. Pollution peaks around 2:00 PM (O3: 28.2/100). 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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Sundsvall's air quality reflects the Ljungan river valley's position on the Gulf of Bothnia, with the Sundsvall Harbour's industrial and paper manufacturing operations and vehicle traffic on the E4 contributing local sources. The Gulf of Bothnia's consistent northerly and westerly winds generally provide reliable maritime ventilation, while the surrounding northern Swedish boreal forest maintains a clean-air backdrop and winter wood-burning stoves add seasonal PM2.5 peaks.
Today - 16 July | Pollution peaks at 15:00
AQI:
Fair
22.6/100
PM2.5 (fine particles):
Good
5.4/100
PM10 (coarse particles):
Good
1.7/100
NO2 (nitrogen dioxide):
Good
3.9/100
O3 (ozone):
Fair
22.6/100
SO2 (sulfur dioxide):
Good
0.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
2.3/100
PM1 (ultrafine particles):
Good
5.1/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 14:00
AQI:
Fair
28.2/100
PM2.5 (fine particles):
Good
7.4/100
PM10 (coarse particles):
Good
2.2/100
NO2 (nitrogen dioxide):
Good
9.1/100
O3 (ozone):
Fair
28.2/100
SO2 (sulfur dioxide):
Good
0.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.4/100
PM1 (ultrafine particles):
Good
8.6/100
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Frequently Asked Questions
Is air quality bad in Sundsvall right now?
On 16 July 2026, overall air quality in Sundsvall is fair. AQI is the main air quality indicator at 22.6/100. Pollution peaks around 3:00 PM (O3: 22.6/100).
Will air quality be worse tomorrow in Sundsvall?
On 17 July 2026, air quality conditions in Sundsvall will be similar to today, with AQI forecast at fair at 28.2/100. Pollution peaks around 2:00 PM (O3: 28.2/100).
When is air pollution at its worst in Sundsvall?
Does air quality in Sundsvall vary by season? Expect the occasional poor-air-quality day in winter, when a stable, windless cold snap traps smoke and exhaust that would otherwise disperse. Spring typically brings a steady improvement, with more unsettled, breezy weather flushing out accumulated pollutants. Warm-season conditions are generally the most favourable of the year, with wood-burning emissions largely absent. Autumn is a transitional period: as the heating season resumes in September and October, occasional calm evenings can again trap wood-smoke locally. As is typical for this part of the country, the seasonal contrast here is clear but not extreme.
Are air quality levels in Sundsvall 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