Worst air pollution Custer, today and tomorrow
Today (9 August): Air quality in Custer is fair. AQI, NO2, and O3 are fair; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 7:00 AM (O3: 36.8/100).
Tomorrow (10 August 2026): Air quality in Custer is fair. All pollutants stay as today. Pollution peaks around 4:00 PM (NO2: 39.0/100). 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.
Custer's air quality is shaped largely by Black Hills forest air; typically clean air with excellent visibility across the hills. Day-to-day conditions in Custer can still vary with local weather, wind direction, and time of year. Visitors and residents alike tend to notice the clearest air outside the warmest summer weeks.
Today - 9 August | Pollution peaks at 07:00
AQI:
Fair
36.8/100
PM2.5 (fine particles):
Good
13.2/100
PM10 (coarse particles):
Good
5.9/100
NO2 (nitrogen dioxide):
Fair
32.6/100
O3 (ozone):
Fair
36.8/100
SO2 (sulfur dioxide):
Good
3.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
7.7/100
PM1 (ultrafine particles):
Good
10.5/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 16:00
AQI:
Fair
39.0/100
PM2.5 (fine particles):
Good
12.9/100
PM10 (coarse particles):
Good
7.2/100
NO2 (nitrogen dioxide):
Fair
39.0/100
O3 (ozone):
Fair
31.8/100
SO2 (sulfur dioxide):
Good
4.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.4/100
PM1 (ultrafine particles):
Good
9.1/100
Pollen forecast in Custer
View pollen forecastFrequently Asked Questions
Is air quality bad in Custer right now?
On 9 August 2026, overall air quality in Custer is fair. AQI is the main air quality indicator at 36.8/100. Pollution peaks around 7:00 AM (O3: 36.8/100).
Will air quality be worse tomorrow in Custer?
On 10 August 2026, air quality conditions in Custer will be similar to today, with AQI forecast at fair at 39.0/100. Pollution peaks around 4:00 PM (NO2: 39.0/100).
When is air pollution at its worst in Custer?
Custer's air quality has a clear seasonal rhythm. Typically, once the harvest dust settles, winter typically offers the cleanest stretch of the year, while 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 Custer 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: 9 August 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.
Get the full experience in the Airmine app.