Worst air pollution Fort McHenry - Baltimore, today and tomorrow
Today (16 July): Air quality in Fort McHenry is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 1:00 PM (O3: 35.2/100).
Tomorrow (17 July 2026): Air quality in Fort McHenry is fair. All pollutants stay as today. Pollution peaks around 12:00 PM (O3: 39.5/100). Airmine updates local air quality forecasts four times daily.
For long term forecasts and maps, see the Airmine app
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
Use our Strava plugin to check your own exposure.
Given its location — a star-shaped harbor fort surrounded by open waterfront lawn — Fort McHenry shares Baltimore's wider air quality pattern rather than a distinct local one. Checking conditions closer to visit time is still the best way to plan around this specific site.
Today - 16 July | Pollution peaks at 13:00
AQI:
Fair
35.2/100
PM2.5 (fine particles):
Good
13.4/100
PM10 (coarse particles):
Good
8.9/100
NO2 (nitrogen dioxide):
Good
12.3/100
O3 (ozone):
Fair
35.2/100
SO2 (sulfur dioxide):
Good
1.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.5/100
PM1 (ultrafine particles):
Good
9.3/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 12:00
AQI:
Fair
39.5/100
PM2.5 (fine particles):
Good
16.6/100
PM10 (coarse particles):
Good
10.5/100
NO2 (nitrogen dioxide):
Good
11.8/100
O3 (ozone):
Fair
39.5/100
SO2 (sulfur dioxide):
Good
2.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.6/100
PM1 (ultrafine particles):
Good
10.7/100
Other Landmarks in Baltimore
Sports venues in Baltimore
Frequently Asked Questions
Is air quality bad in Fort McHenry right now?
On 16 July 2026, overall air quality in Fort McHenry is fair. AQI is the main air quality indicator at 35.2/100. Pollution peaks around 1:00 PM (O3: 35.2/100).
Will air quality be worse tomorrow in Fort McHenry?
On 17 July 2026, air quality conditions in Fort McHenry will be similar to today, with AQI forecast at fair at 39.5/100. Pollution peaks around 12:00 PM (O3: 39.5/100).
When is air pollution at its worst in Fort McHenry?
Fort McHenry experiences the same seasonal air quality swings as the rest of Baltimore, as winter generally brings the cleanest air, once the summer ozone season has passed; by contrast, extended summer heat waves, often worsened by regional haze, bring the toughest air quality stretch. Dense urban traffic corridors add a persistent background level of pollution that varies less by season than ozone does.
Are air quality levels in Fort McHenry 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.
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: 16 July 2026 at 10:33 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.
For long term forecasts and maps, see the Airmine app