Worst air pollution Cadillac Mountain - Bar Harbor, today and tomorrow
Today (16 July): Air quality in Cadillac Mountain is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 9:00 AM (O3: 37.5/100).
Tomorrow (17 July 2026): Air quality in Cadillac Mountain is fair. All pollutants stay as today. Pollution peaks around 8:00 AM (O3: 30.7/100). 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
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Bar Harbor's Cadillac Mountain air quality benefits from its exceptional Acadia National Park summit position at 466 metres — the first place in the US to see the sunrise from October through March — with consistent Atlantic and Gulf of Maine sea breezes providing outstanding maritime ventilation at the summit. The extraordinary open-summit position with ocean views in all directions and the consistent maritime exposure generally maintain Cadillac Mountain among New England's most reliably ventilated major summits throughout most of the year.
Today - 16 July | Pollution peaks at 09:00
AQI:
Fair
37.5/100
PM2.5 (fine particles):
Good
7.4/100
PM10 (coarse particles):
Good
3.7/100
NO2 (nitrogen dioxide):
Good
0/100
O3 (ozone):
Fair
37.5/100
SO2 (sulfur dioxide):
Good
0/100
CO (carbon monoxide):
Good
0/100
HCHO (formaldehyde):
Good
5.0/100
PM1 (ultrafine particles):
Good
6.6/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 08:00
AQI:
Fair
30.7/100
PM2.5 (fine particles):
Good
6.4/100
PM10 (coarse particles):
Good
2.6/100
NO2 (nitrogen dioxide):
Good
0/100
O3 (ozone):
Fair
30.7/100
SO2 (sulfur dioxide):
Good
0/100
CO (carbon monoxide):
Good
0/100
HCHO (formaldehyde):
Good
3.3/100
PM1 (ultrafine particles):
Good
5.2/100
Other Landmarks in Bar Harbor
Frequently Asked Questions
Is air quality bad in Cadillac Mountain right now?
On 16 July 2026, overall air quality in Cadillac Mountain is fair. AQI is the main air quality indicator at 37.5/100. Pollution peaks around 9:00 AM (O3: 37.5/100).
Will air quality be worse tomorrow in Cadillac Mountain?
On 17 July 2026, air quality conditions in Cadillac Mountain will be similar to today, with AQI forecast at fair at 30.7/100. Pollution peaks around 8:00 AM (O3: 30.7/100).
When is air pollution at its worst in Cadillac Mountain?
Cadillac Mountain follows Bar Harbor's typical seasonal air quality pattern, as frequent frontal systems in spring and fall usually keep the air cleanest then; by contrast, summer heat and regional haze drifting up from the Midwest and South drive ozone spikes. Winter cold fronts tend to clear the air quickly, so extended pollution episodes are relatively uncommon.
Are air quality levels in Cadillac Mountain 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?
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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