Worst air pollution Bellingham, today and tomorrow
Today (15 July): Air quality in Bellingham is medium. AQI, NO2, and O3 are medium; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 10:00 PM (NO2: 41.6/100).
Tomorrow (16 July 2026): Air quality in Bellingham is medium. All pollutants stay as today. Pollution peaks around 5:00 AM (O3: 49.1/100). 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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Bellingham's air quality benefits from its Puget Sound coastal position with consistent Pacific maritime airflows providing reliable ventilation. Vehicle emissions from I-5 are the primary local source, while summer wildfire smoke from BC and Washington forests is an increasingly severe seasonal concern and the Cherry Point refinery contributes industrial emissions on easterly winds.
Today - 15 July | Pollution peaks at 22:00
AQI:
Medium
41.6/100
PM2.5 (fine particles):
Good
14.6/100
PM10 (coarse particles):
Good
5.5/100
NO2 (nitrogen dioxide):
Medium
41.6/100
O3 (ozone):
Medium
40.3/100
SO2 (sulfur dioxide):
Good
12.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.5/100
PM1 (ultrafine particles):
Good
16.1/100
Levels show the poorest local air quality during the day
Tomorrow - 16 July | Pollution peaks at 05:00
AQI:
Medium
49.1/100
PM2.5 (fine particles):
Good
17.2/100
PM10 (coarse particles):
Good
5.8/100
NO2 (nitrogen dioxide):
Medium
43.2/100
O3 (ozone):
Medium
49.1/100
SO2 (sulfur dioxide):
Good
9.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
6.8/100
PM1 (ultrafine particles):
Good
20.0/100
Pollen forecast in Bellingham
View pollen forecastAir quality forecasts for neighbourhoods and landmarks in Bellingham
Frequently Asked Questions
Is air quality bad in Bellingham right now?
On 15 July 2026, overall air quality in Bellingham is medium. AQI is the main air quality indicator at 41.6/100. Pollution peaks around 10:00 PM (NO2: 41.6/100).
Will air quality be worse tomorrow in Bellingham?
On 16 July 2026, air quality conditions in Bellingham will be similar to today, with AQI forecast at medium at 49.1/100. Pollution peaks around 5:00 AM (O3: 49.1/100).
When is air pollution at its worst in Bellingham?
Conditions in Bellingham vary noticeably across the seasons: rain-heavy winters keep the air unusually clean compared to much of the country, but late summer wildfire smoke is the biggest concern, sometimes pushing air quality into unhealthy territory for days at a stretch. Winter temperature inversions can briefly trap wood-smoke in low-lying valleys, but these episodes are usually short-lived.
Are air quality levels in Bellingham 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.
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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