Worst air pollution SAE-ZBT-Marpa House - Boulder, today and tomorrow
Today (20 September): Air quality in SAE-ZBT-Marpa House is moderate. AQI, NO2, and O3 are moderate; PM2.5 is fair; PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 5:00 PM (NO2: 54.4/100).
Tomorrow (21 September 2026): Air quality in SAE-ZBT-Marpa House is moderate. All pollutants stay as today. Pollution peaks around 9:00 AM (O3: 58.6/100). Airmine updates local air quality forecasts four times daily.
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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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In SAE-ZBT-Marpa House, with vehicle traffic relatively low, dust from nearby fields and occasional burning are the bigger day-to-day factors. Green space in the area offers some natural filtering, softening the local particulate load somewhat. Conditions on any given day depend heavily on wind speed and direction locally. Nearby areas with a similar setup tend to show a comparable air quality baseline.
Today - 20 September | Pollution peaks at 17:00
AQI:
Moderate
54.4/100
PM2.5 (fine particles):
Fair
25.3/100
PM10 (coarse particles):
Good
13.9/100
NO2 (nitrogen dioxide):
Moderate
54.4/100
O3 (ozone):
Moderate
50.3/100
SO2 (sulfur dioxide):
Good
2.0/100
CO (carbon monoxide):
Good
0.6/100
HCHO (formaldehyde):
Good
3.1/100
PM1 (ultrafine particles):
Good
3.3/100
Levels show the poorest local air quality during the day
Tomorrow - 21 September | Pollution peaks at 09:00
AQI:
Moderate
58.6/100
PM2.5 (fine particles):
Fair
26.2/100
PM10 (coarse particles):
Good
14.0/100
NO2 (nitrogen dioxide):
Moderate
53.9/100
O3 (ozone):
Moderate
58.6/100
SO2 (sulfur dioxide):
Good
2.3/100
CO (carbon monoxide):
Good
0.6/100
HCHO (formaldehyde):
Good
4.0/100
PM1 (ultrafine particles):
Good
3.3/100
Other Landmarks in Boulder
Frequently Asked Questions
Is air quality bad in SAE-ZBT-Marpa House right now?
On 20 September 2026, overall air quality in SAE-ZBT-Marpa House is moderate. AQI is the main air quality indicator at 54.4/100. Pollution peaks around 5:00 PM (NO2: 54.4/100).
Will air quality be worse tomorrow in SAE-ZBT-Marpa House?
On 21 September 2026, air quality conditions in SAE-ZBT-Marpa House will be similar to today, with AQI forecast at moderate at 58.6/100. Pollution peaks around 9:00 AM (O3: 58.6/100).
When is air pollution at its worst in SAE-ZBT-Marpa House?
September through November tends to be calm here, with wind speeds averaging around 12 km/h and temperatures near 12°C -- conditions cool and still enough for particulate matter and smoke to settle near the ground instead of dispersing. June through August runs warmer, averaging around 23°C -- hot enough for strong sun and heat to drive ground-level ozone formation.
Are air quality levels in SAE-ZBT-Marpa House 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: 20 September 2026 at 20:27 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.
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