Worst air pollution Pony Express National Museum - St. Joseph, today and tomorrow
Today (9 August): Air quality in Pony Express National Museum is fair. AQI, PM2.5, NO2, and O3 are fair; PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 11:00 AM (O3: 35.7/100).
Tomorrow (10 August 2026): Air quality in Pony Express National Museum is fair. PM2.5 decreases to good; all other pollutants stay as today. Pollution peaks around 7:00 AM (O3: 34.8/100). Airmine updates local air quality forecasts four times daily.
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Pony Express National Museum, situated at a museum in the original 1860 stables building, sees the same seasonal air quality swings that shape the rest of St. Joseph. As with most sublevel sites, the broader city trend is the best guide to typical conditions here.
Today - 9 August | Pollution peaks at 11:00
AQI:
Fair
35.7/100
PM2.5 (fine particles):
Fair
20.3/100
PM10 (coarse particles):
Good
7.6/100
NO2 (nitrogen dioxide):
Fair
34.3/100
O3 (ozone):
Fair
35.7/100
SO2 (sulfur dioxide):
Good
9.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
2.3/100
PM1 (ultrafine particles):
Good
15.2/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 07:00
AQI:
Fair
34.8/100
PM2.5 (fine particles):
Good
17.0/100
PM10 (coarse particles):
Good
6.7/100
NO2 (nitrogen dioxide):
Fair
26.5/100
O3 (ozone):
Fair
34.8/100
SO2 (sulfur dioxide):
Good
9.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
2.3/100
PM1 (ultrafine particles):
Good
13.0/100
Other Landmarks in St. Joseph
Frequently Asked Questions
Is air quality bad in Pony Express National Museum right now?
On 9 August 2026, overall air quality in Pony Express National Museum is fair. AQI is the main air quality indicator at 35.7/100. Pollution peaks around 11:00 AM (O3: 35.7/100).
Will air quality be worse tomorrow in Pony Express National Museum?
On 10 August 2026, air quality conditions in Pony Express National Museum will be similar to today, with AQI forecast at fair at 34.8/100. Pollution peaks around 7:00 AM (O3: 34.8/100).
When is air pollution at its worst in Pony Express National Museum?
Like the rest of St. Joseph, Pony Express National Museum sees air quality change through the year: winter generally brings the cleanest air, aside from brief inversion episodes during calm cold spells, but spring planting and autumn harvest can push particulate levels up with dust and agricultural burning. Wide-open terrain generally helps disperse pollution quickly once the wind picks up.
Are air quality levels in Pony Express National Museum 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.
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Data provided by Airmine — Last update: 10 August 2026 at 02:34 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.
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