Worst air pollution Collierville, today and tomorrow
Today (20 September): Air quality in Collierville is moderate. AQI and PM10 are moderate; PM2.5 and NO2 are fair; O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 7:00 AM (PM10: 43.9/100).
Tomorrow (21 September 2026): Air quality in Collierville is fair. AQI improves to fair; PM10 decreases to fair; O3 increases to fair; all other pollutants stay as today. Pollution peaks around 6:00 PM (NO2: 32.3/100). Airmine updates local air quality forecasts four times daily.
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Collierville's air quality reflects the flat suburban Shelby County position east of Memphis in the Tennessee-Mississippi border region, with vehicle emissions from US-72 and the surrounding affluent residential and commercial character contributing local sources. The broader Memphis regional ozone from vehicle sources is the primary warm-season concern, while the flat terrain and consistent Gulf South winds generally maintain moderate conditions and Collierville's planned community character limits heavy industrial emissions throughout the year.
Today - 20 September | Pollution peaks at 07:00
AQI:
Moderate
43.9/100
PM2.5 (fine particles):
Fair
33.8/100
PM10 (coarse particles):
Moderate
43.9/100
NO2 (nitrogen dioxide):
Fair
24.7/100
O3 (ozone):
Good
19.4/100
SO2 (sulfur dioxide):
Good
2.2/100
CO (carbon monoxide):
Good
0.6/100
HCHO (formaldehyde):
Good
2.3/100
PM1 (ultrafine particles):
Good
4.5/100
Levels show the poorest local air quality during the day
Tomorrow - 21 September | Pollution peaks at 18:00
AQI:
Fair
32.3/100
PM2.5 (fine particles):
Fair
27.4/100
PM10 (coarse particles):
Fair
21.7/100
NO2 (nitrogen dioxide):
Fair
32.3/100
O3 (ozone):
Fair
26.3/100
SO2 (sulfur dioxide):
Good
1.7/100
CO (carbon monoxide):
Good
0.6/100
HCHO (formaldehyde):
Good
2.4/100
PM1 (ultrafine particles):
Good
5.0/100
Pollen forecast in Collierville
View pollen forecastFrequently Asked Questions
Is air quality bad in Collierville right now?
On 20 September 2026, overall air quality in Collierville is moderate. AQI is the main air quality indicator at 43.9/100. Pollution peaks around 7:00 AM (PM10: 43.9/100).
Will air quality be worse tomorrow in Collierville?
On 21 September 2026, air quality conditions in Collierville will be better than today, with AQI forecast at fair at 32.3/100. Pollution peaks around 6:00 PM (NO2: 32.3/100).
When is air pollution at its worst in Collierville?
Conditions in Collierville vary noticeably across the seasons: winter is typically the cleanest season, with mild temperatures and fewer stagnant air episodes, but summer heat, humidity, and emissions from surrounding forests combine to drive ozone levels up. Prescribed burns are more common in the cooler months and can add brief smoke episodes.
Are air quality levels in Collierville 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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