Worst air pollution Bar Harbor, today and tomorrow
Today (16 July): Air quality in Bar Harbor 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 Bar Harbor 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.
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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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Air quality in Bar Harbor is driven mostly by cold North Atlantic air — clean maritime air keeps pollution levels low nearly year-round. Overall, Bar Harbor sees air quality that tracks fairly closely with typical conditions for its wider region. Local topography and prevailing winds both play a role in how quickly conditions change.
Today - 16 July | Pollution peaks at 09:00
AQI:
Fair
37.5/100
PM2.5 (fine particles):
Good
12.6/100
PM10 (coarse particles):
Good
6.4/100
NO2 (nitrogen dioxide):
Good
15.7/100
O3 (ozone):
Fair
37.5/100
SO2 (sulfur dioxide):
Good
2.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.0/100
PM1 (ultrafine particles):
Good
11.3/100
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
11.0/100
PM10 (coarse particles):
Good
4.4/100
NO2 (nitrogen dioxide):
Good
14.8/100
O3 (ozone):
Fair
30.7/100
SO2 (sulfur dioxide):
Good
2.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.3/100
PM1 (ultrafine particles):
Good
8.9/100
Pollen forecast in Bar Harbor
View pollen forecastAir quality forecasts for neighbourhoods and landmarks in Bar Harbor
Frequently Asked Questions
Is air quality bad in Bar Harbor right now?
On 16 July 2026, overall air quality in Bar Harbor 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 Bar Harbor?
On 17 July 2026, air quality conditions in Bar Harbor 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 Bar Harbor?
Bar Harbor experiences a distinct seasonal swing in air quality — frequent frontal systems in spring and fall usually keep the air cleanest then, whereas summer heat waves, often worsened by haze drifting in from other regions, bring the year's worst air. Winter cold fronts tend to clear the air quickly, so extended pollution episodes are relatively uncommon.
Are air quality levels in Bar Harbor 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