Worst air pollution Bellingham, today and tomorrow
Today (9 August): Air quality in Bellingham is fair. AQI, NO2, and O3 are fair; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 11:00 PM (NO2: 31.1/100).
Tomorrow (10 August 2026): Air quality in Bellingham is fair. All pollutants stay as today. Pollution peaks around 6:00 PM (NO2: 36.4/100). Airmine updates local air quality forecasts four times daily.
Get the full experience in the Airmine app.
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
Follow your pollen exposure and performance with the free Airmine–Strava integration. See your pollen and air quality exposure for every Strava activity.
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 - 9 August | Pollution peaks at 23:00
AQI:
Fair
31.1/100
PM2.5 (fine particles):
Good
18.2/100
PM10 (coarse particles):
Good
15.2/100
NO2 (nitrogen dioxide):
Fair
31.1/100
O3 (ozone):
Fair
29.8/100
SO2 (sulfur dioxide):
Good
10.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
6.9/100
PM1 (ultrafine particles):
Good
13.2/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 18:00
AQI:
Fair
36.4/100
PM2.5 (fine particles):
Good
11.4/100
PM10 (coarse particles):
Good
4.3/100
NO2 (nitrogen dioxide):
Fair
36.4/100
O3 (ozone):
Fair
28.8/100
SO2 (sulfur dioxide):
Good
10.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.3/100
PM1 (ultrafine particles):
Good
7.9/100
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 9 August 2026, overall air quality in Bellingham is fair. AQI is the main air quality indicator at 31.1/100. Pollution peaks around 11:00 PM (NO2: 31.1/100).
Will air quality be worse tomorrow in Bellingham?
On 10 August 2026, air quality conditions in Bellingham will be similar to today, with AQI forecast at fair at 36.4/100. Pollution peaks around 6:00 PM (NO2: 36.4/100).
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.
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.
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: 10 August 2026 at 02:34 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.
Get the full experience in the Airmine app.