Worst air pollution Elyria Swansea - Denver, today and tomorrow
Today (20 September): Air quality in Elyria Swansea is moderate. AQI, PM2.5, and O3 are moderate; NO2 is fair; PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 8:00 AM (O3: 56.7/100).
Tomorrow (21 September 2026): Air quality in Elyria Swansea is poor. AQI worsens to poor; PM2.5 decreases to fair; NO2 increases to moderate; O3 increases to poor; all other pollutants stay as today. Pollution peaks around 9:00 AM (O3: 64.9/100). 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 Elyria Swansea, this area's modest traffic load leaves farmland dust and seasonal burning as the more significant local air factors. Some of this load is absorbed by nearby vegetation, acting as a modest natural filter. Wind patterns on any given day can shift this picture meaningfully in either direction.
Today - 20 September | Pollution peaks at 08:00
AQI:
Moderate
56.7/100
PM2.5 (fine particles):
Moderate
40.0/100
PM10 (coarse particles):
Good
17.8/100
NO2 (nitrogen dioxide):
Fair
35.3/100
O3 (ozone):
Moderate
56.7/100
SO2 (sulfur dioxide):
Good
1.9/100
CO (carbon monoxide):
Good
0.6/100
HCHO (formaldehyde):
Good
3.2/100
PM1 (ultrafine particles):
Good
6.9/100
Levels show the poorest local air quality during the day
Tomorrow - 21 September | Pollution peaks at 09:00
AQI:
Poor
64.9/100
PM2.5 (fine particles):
Fair
37.5/100
PM10 (coarse particles):
Good
16.5/100
NO2 (nitrogen dioxide):
Moderate
42.8/100
O3 (ozone):
Poor
64.9/100
SO2 (sulfur dioxide):
Good
2.0/100
CO (carbon monoxide):
Good
0.6/100
HCHO (formaldehyde):
Good
5.1/100
PM1 (ultrafine particles):
Good
6.8/100
Other Landmarks in Denver
Sports venues in Denver
Frequently Asked Questions
Is air quality bad in Elyria Swansea right now?
On 20 September 2026, overall air quality in Elyria Swansea is moderate. AQI is the main air quality indicator at 56.7/100. Pollution peaks around 8:00 AM (O3: 56.7/100).
Will air quality be worse tomorrow in Elyria Swansea?
On 21 September 2026, air quality conditions in Elyria Swansea will be worse than today, with AQI forecast at poor at 64.9/100. Pollution peaks around 9:00 AM (O3: 64.9/100).
When is air pollution at its worst in Elyria Swansea?
From September to November, average wind speeds run around 12 km/h with temperatures near 12°C, calm and cool enough to let particulate matter and smoke build up near the ground rather than disperse. Temperatures climb to around 23°C on average from June to August, warm enough for intense sun and heat to fuel ground-level ozone formation.
Are air quality levels in Elyria Swansea 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 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.
Get the full experience in the Airmine app.