Worst air pollution Kreis 1 (Altstadt) - Zürich, today and tomorrow
Today (16 July): Air quality in Kreis 1 (Altstadt) is medium. AQI, NO2, and O3 are medium; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 2:00 PM (O3: 43.5/100).
Tomorrow (17 July 2026): Air quality in Kreis 1 (Altstadt) is fair. AQI worsens to fair; NO2 increases to fair; O3 increases to fair; PM1 increases to fair; all other pollutants stay as today. Pollution peaks around 12:00 AM (NO2: 39.0/100). 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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Kreis 1's air quality reflects Zürich's densest historic core, with pedestrian zones limiting through-traffic while surrounding Limmatquai and Bahnhofstrasse traffic contribute background emissions to this central district.
Today - 16 July | Pollution peaks at 14:00
AQI:
Medium
43.5/100
PM2.5 (fine particles):
Good
14.5/100
PM10 (coarse particles):
Good
5.6/100
NO2 (nitrogen dioxide):
Medium
40.0/100
O3 (ozone):
Medium
43.5/100
SO2 (sulfur dioxide):
Good
1.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.3/100
PM1 (ultrafine particles):
Good
15.9/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 00:00
AQI:
Fair
39.0/100
PM2.5 (fine particles):
Good
16.6/100
PM10 (coarse particles):
Good
6.1/100
NO2 (nitrogen dioxide):
Fair
39.0/100
O3 (ozone):
Fair
33.7/100
SO2 (sulfur dioxide):
Good
1.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.3/100
PM1 (ultrafine particles):
Fair
20.1/100
Other Landmarks in Zürich
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Frequently Asked Questions
Is air quality bad in Kreis 1 (Altstadt) right now?
On 16 July 2026, overall air quality in Kreis 1 (Altstadt) is medium. AQI is the main air quality indicator at 43.5/100. Pollution peaks around 2:00 PM (O3: 43.5/100).
Will air quality be worse tomorrow in Kreis 1 (Altstadt)?
On 17 July 2026, air quality conditions in Kreis 1 (Altstadt) will be worse than today, with AQI forecast at fair at 39.0/100. Pollution peaks around 12:00 AM (NO2: 39.0/100).
When is air pollution at its worst in Kreis 1 (Altstadt)?
Kreis 1 (Altstadt)'s poorest air quality shows up when winter calm lets vehicle traffic and dense urban activity accumulate near the lakeshore rather than clearing out with the usual breeze. From spring, conditions steadily pick up, and summer stays mostly clear aside from a rare ozone spike in prolonged heat, with autumn usually just as settled.
Are air quality levels in Kreis 1 (Altstadt) 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