Worst air pollution Frogtown - Saint Paul, today and tomorrow
Today (20 September): Air quality in Frogtown is good. AQI, PM2.5, PM10, NO2, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 7:00 AM (O3: 19.5/100).
Tomorrow (21 September 2026): Air quality in Frogtown is good. All pollutants stay as today. Pollution peaks around 2:00 PM (NO2: 16.0/100). Airmine updates local air quality forecasts four times daily.
Get the full experience in the Airmine app.
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
Follow your pollen exposure and performance with the free Airmine–Strava integration. See your pollen and air quality exposure for every Strava activity.
In Frogtown, busy roads and concentrated city activity are the biggest single source of particulate matter in this area. Green space nearby provides modest natural relief, filtering a portion of this particulate load. Day-to-day readings still shift with wind direction, traffic volume, and weather conditions. Local monitoring for the wider area tends to track closely with this general pattern.
Today - 20 September | Pollution peaks at 07:00
AQI:
Good
19.5/100
PM2.5 (fine particles):
Good
16.8/100
PM10 (coarse particles):
Good
11.2/100
NO2 (nitrogen dioxide):
Good
16.0/100
O3 (ozone):
Good
19.5/100
SO2 (sulfur dioxide):
Good
0.4/100
CO (carbon monoxide):
Good
0.6/100
HCHO (formaldehyde):
Good
4.9/100
PM1 (ultrafine particles):
Good
6.3/100
Levels show the poorest local air quality during the day
Tomorrow - 21 September | Pollution peaks at 14:00
AQI:
Good
16.0/100
PM2.5 (fine particles):
Good
14.2/100
PM10 (coarse particles):
Good
8.7/100
NO2 (nitrogen dioxide):
Good
16.0/100
O3 (ozone):
Good
15.8/100
SO2 (sulfur dioxide):
Good
0.5/100
CO (carbon monoxide):
Good
0.6/100
HCHO (formaldehyde):
Good
5.1/100
PM1 (ultrafine particles):
Good
5.8/100
Other Landmarks in Saint Paul
Sports venues in Saint Paul
Frequently Asked Questions
Is air quality bad in Frogtown right now?
On 20 September 2026, overall air quality in Frogtown is good. AQI is the main air quality indicator at 19.5/100. Pollution peaks around 7:00 AM (O3: 19.5/100).
Will air quality be worse tomorrow in Frogtown?
On 21 September 2026, air quality conditions in Frogtown will be similar to today, with AQI forecast at good at 16.0/100. Pollution peaks around 2:00 PM (NO2: 16.0/100).
When is air pollution at its worst in Frogtown?
Winter months routinely see the year's steepest rise in particulate matter across this urban area, when winter inversions hold traffic and heating emissions in place over the city for days at a time. Summer heat pushes ozone to the forefront of air quality concerns in this dense area, since dense traffic emissions combined with intense sun and heat fuel ozone formation across the city.
Are air quality levels in Frogtown 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.
Want to see air quality forecasts for other cities in United States?
Check air quality in other popular cities:
Data provided by Airmine — Last update: 20 September 2026 at 14:33 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.
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.
Get the full experience in the Airmine app.