Worst air pollution Antietam, today and tomorrow
Today (30 August): Air quality in Antietam is moderate. AQI and O3 are moderate; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 9:00 AM (O3: 40.8/100).
Tomorrow (31 August 2026): Air quality in Antietam is fair. AQI improves to fair; O3 decreases to fair; all other pollutants stay as today. Pollution peaks around 12:00 PM (O3: 31.1/100). 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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Antietam National Battlefield's air quality benefits from the Maryland Blue Ridge foothills position, with consistent Appalachian westerly winds providing reliable ventilation across the historic Civil War battlefield. Vehicle traffic on the surrounding MD-65 contributes modest local sources, while the extraordinary preserved pastoral landscape's open geometry and the Antietam Creek's riparian woodland provide natural ventilation and the park generally maintains good conditions throughout most of the year.
Today - 30 August | Pollution peaks at 09:00
AQI:
Moderate
40.8/100
PM2.5 (fine particles):
Good
9.0/100
PM10 (coarse particles):
Good
9.6/100
NO2 (nitrogen dioxide):
Good
3.8/100
O3 (ozone):
Moderate
40.8/100
SO2 (sulfur dioxide):
Good
0.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
2.8/100
PM1 (ultrafine particles):
Good
4.9/100
Levels show the poorest local air quality during the day
Tomorrow - 31 August | Pollution peaks at 12:00
AQI:
Fair
31.1/100
PM2.5 (fine particles):
Good
10.4/100
PM10 (coarse particles):
Good
9.3/100
NO2 (nitrogen dioxide):
Good
2.8/100
O3 (ozone):
Fair
31.1/100
SO2 (sulfur dioxide):
Good
0.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
2.0/100
PM1 (ultrafine particles):
Good
4.2/100
Pollen forecast in Antietam
View pollen forecastFrequently Asked Questions
Is air quality bad in Antietam right now?
On 30 August 2026, overall air quality in Antietam is moderate. AQI is the main air quality indicator at 40.8/100. Pollution peaks around 9:00 AM (O3: 40.8/100).
Will air quality be worse tomorrow in Antietam?
On 31 August 2026, air quality conditions in Antietam will be better than today, with AQI forecast at fair at 31.1/100. Pollution peaks around 12:00 PM (O3: 31.1/100).
When is air pollution at its worst in Antietam?
At Antietam National Battlefield, air quality tends to follow Antietam's broader seasonal rhythm: the cleanest stretch of the year usually comes in winter, but the hottest, most humid summer weeks bring the year's highest ozone readings. Dense urban traffic corridors add a persistent background level of pollution that varies less by season than ozone does.
Are air quality levels in Antietam 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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