Worst air pollution Spearfish, today and tomorrow
Today (30 August): Air quality in Spearfish is moderate. AQI and NO2 are moderate; PM2.5, PM10, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 12:00 AM (NO2: 44.5/100).
Tomorrow (31 August 2026): Air quality in Spearfish is moderate. PM2.5 increases to fair; O3 increases to fair; all other pollutants stay as today. Pollution peaks around 11:00 PM (NO2: 49.0/100). 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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Spearfish experiences air quality conditions shaped chiefly by clean Black Hills mountain air, and air quality is generally excellent outside of wildfire-smoke episodes. None of this is unusual for a place with Spearfish's particular geography and climate. Checking current readings is still the best way to plan outdoor activity around Spearfish.
Today - 30 August | Pollution peaks at 00:00
AQI:
Moderate
44.5/100
PM2.5 (fine particles):
Good
11.4/100
PM10 (coarse particles):
Good
4.6/100
NO2 (nitrogen dioxide):
Moderate
44.5/100
O3 (ozone):
Good
19.4/100
SO2 (sulfur dioxide):
Good
5.9/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.1/100
PM1 (ultrafine particles):
Good
5.5/100
Levels show the poorest local air quality during the day
Tomorrow - 31 August | Pollution peaks at 23:00
AQI:
Moderate
49.0/100
PM2.5 (fine particles):
Fair
21.6/100
PM10 (coarse particles):
Good
8.7/100
NO2 (nitrogen dioxide):
Moderate
49.0/100
O3 (ozone):
Fair
22.6/100
SO2 (sulfur dioxide):
Good
7.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
2.3/100
PM1 (ultrafine particles):
Good
9.3/100
Pollen forecast in Spearfish
View pollen forecastFrequently Asked Questions
Is air quality bad in Spearfish right now?
On 30 August 2026, overall air quality in Spearfish is moderate. AQI is the main air quality indicator at 44.5/100. Pollution peaks around 12:00 AM (NO2: 44.5/100).
Will air quality be worse tomorrow in Spearfish?
On 31 August 2026, air quality conditions in Spearfish will be similar to today, with AQI forecast at moderate at 49.0/100. Pollution peaks around 11:00 PM (NO2: 49.0/100).
When is air pollution at its worst in Spearfish?
Air quality across Spearfish rises and falls with the seasons. In short, once the harvest dust settles, winter typically offers the cleanest stretch of the year, whereas spring planting and autumn harvest can push particulate levels up with dust and agricultural burning. Farm-heavy surrounding land is the main source of the seasonal dust spikes.
Are air quality levels in Spearfish 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: 30 August 2026 at 20:26 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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