Worst air pollution Ottumwa, today and tomorrow
Today (30 August): Air quality in Ottumwa is moderate. AQI and NO2 are moderate; O3 is fair; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 9:00 PM (NO2: 47.4/100).
Tomorrow (31 August 2026): Air quality in Ottumwa is fair. AQI improves to fair; NO2 decreases to fair; all other pollutants stay as today. Pollution peaks around 11:00 AM (O3: 30.3/100). 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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Ottumwa experiences air quality conditions shaped chiefly by open southern Iowa farmland air, and air quality is generally good outside of ragweed season. Most days bring generally favorable conditions here, with occasional exceptions tied to shifting weather patterns. Visitors and residents alike tend to notice the clearest air outside the warmest summer weeks.
Today - 30 August | Pollution peaks at 21:00
AQI:
Moderate
47.4/100
PM2.5 (fine particles):
Good
9.4/100
PM10 (coarse particles):
Good
4.3/100
NO2 (nitrogen dioxide):
Moderate
47.4/100
O3 (ozone):
Fair
38.5/100
SO2 (sulfur dioxide):
Good
4.9/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.6/100
PM1 (ultrafine particles):
Good
6.8/100
Levels show the poorest local air quality during the day
Tomorrow - 31 August | Pollution peaks at 11:00
AQI:
Fair
30.3/100
PM2.5 (fine particles):
Good
15.2/100
PM10 (coarse particles):
Good
10.1/100
NO2 (nitrogen dioxide):
Fair
28.4/100
O3 (ozone):
Fair
30.3/100
SO2 (sulfur dioxide):
Good
5.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.4/100
PM1 (ultrafine particles):
Good
7.2/100
Pollen forecast in Ottumwa
View pollen forecastFrequently Asked Questions
Is air quality bad in Ottumwa right now?
On 30 August 2026, overall air quality in Ottumwa is moderate. AQI is the main air quality indicator at 47.4/100. Pollution peaks around 9:00 PM (NO2: 47.4/100).
Will air quality be worse tomorrow in Ottumwa?
On 31 August 2026, air quality conditions in Ottumwa will be better than today, with AQI forecast at fair at 30.3/100. Pollution peaks around 11:00 AM (O3: 30.3/100).
When is air pollution at its worst in Ottumwa?
Ottumwa's air quality has a clear seasonal rhythm. Typically, a quiet stretch in deep winter is often the cleanest time, once the growing-season dust has settled, while both spring planting and autumn harvest bring short bursts of elevated dust and smoke. Wide-open terrain generally helps disperse pollution quickly once the wind picks up.
Are air quality levels in Ottumwa 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 14:32 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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