Worst air pollution Pearl District - Portland, today and tomorrow
Today (15 July): Air quality in Pearl District is fair. NO2 is fair; AQI and O3 are medium; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 7:00 AM (O3: 41.5/100).
Tomorrow (16 July 2026): Air quality in Pearl District is fair. AQI worsens to fair; NO2 decreases to good; O3 increases to fair; all other pollutants stay as today. Pollution peaks around 4:00 AM (O3: 36.7/100). 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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Portland's Pearl District sees moderate urban air quality shaped by its dense residential and commercial development and proximity to the Willamette River corridor. The neighbourhood's relatively low traffic compared to other US urban cores and Portland's mild climate keep conditions generally acceptable throughout the year.
Today - 15 July | Pollution peaks at 07:00
AQI:
Medium
41.5/100
PM2.5 (fine particles):
Good
7.4/100
PM10 (coarse particles):
Good
3.8/100
NO2 (nitrogen dioxide):
Fair
23.2/100
O3 (ozone):
Medium
41.5/100
SO2 (sulfur dioxide):
Good
2.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
6.5/100
PM1 (ultrafine particles):
Good
6.1/100
Levels show the poorest local air quality during the day
Tomorrow - 16 July | Pollution peaks at 04:00
AQI:
Fair
36.7/100
PM2.5 (fine particles):
Good
6.8/100
PM10 (coarse particles):
Good
2.6/100
NO2 (nitrogen dioxide):
Good
11.4/100
O3 (ozone):
Fair
36.7/100
SO2 (sulfur dioxide):
Good
2.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.0/100
PM1 (ultrafine particles):
Good
6.4/100
Other Landmarks in Portland
Frequently Asked Questions
Is air quality bad in Pearl District right now?
On 15 July 2026, overall air quality in Pearl District is fair. NO2 is the main pollutant at 23.2/100. Pollution peaks around 7:00 AM (O3: 41.5/100).
Will air quality be worse tomorrow in Pearl District?
On 16 July 2026, air quality conditions in Pearl District will be similar to today, with AQI forecast at fair at 36.7/100. Pollution peaks around 4:00 AM (O3: 36.7/100).
When is air pollution at its worst in Pearl District?
Pearl District follows Portland's typical seasonal air quality pattern. In short, the wet winter and spring months are generally the cleanest, with regular rain limiting particulate buildup, whereas by late summer, wildfire smoke can override the region's usual clean-air advantage for days at a time. Coastal areas see relatively little of the smoke that can settle into inland valleys during fire season.
Are air quality levels in Pearl District 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