Worst air pollution Slabtown - Portland, today and tomorrow
Today (30 August): Air quality in Slabtown is good. AQI, PM2.5, PM10, NO2, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 10:00 AM (O3: 18.8/100).
Tomorrow (31 August 2026): Air quality in Slabtown is good. All pollutants stay as today. Pollution peaks around 5:00 AM (O3: 19.7/100). 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 Slabtown air quality reflects the Northwest Portland Pearl District-adjacent neighbourhood, with vehicle traffic on NW 23rd Avenue and the surrounding mixed residential and commercial character contributing local sources. Summer wildfire smoke is the primary seasonal concern, while the walkable character and the surrounding residential density maintain moderate Portland metropolitan readings and the neighbourhood generally tracks at typical Northwest Portland inner urban levels throughout most of the year.
Today - 30 August | Pollution peaks at 10:00
AQI:
Good
18.8/100
PM2.5 (fine particles):
Good
3.9/100
PM10 (coarse particles):
Good
1.5/100
NO2 (nitrogen dioxide):
Good
3.7/100
O3 (ozone):
Good
18.8/100
SO2 (sulfur dioxide):
Good
0.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.6/100
PM1 (ultrafine particles):
Good
1.8/100
Levels show the poorest local air quality during the day
Tomorrow - 31 August | Pollution peaks at 05:00
AQI:
Good
19.7/100
PM2.5 (fine particles):
Good
6.4/100
PM10 (coarse particles):
Good
2.6/100
NO2 (nitrogen dioxide):
Good
14.5/100
O3 (ozone):
Good
19.7/100
SO2 (sulfur dioxide):
Good
0.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.7/100
PM1 (ultrafine particles):
Good
3.0/100
Other Landmarks in Portland
Frequently Asked Questions
Is air quality bad in Slabtown right now?
On 30 August 2026, overall air quality in Slabtown is good. AQI is the main air quality indicator at 18.8/100. Pollution peaks around 10:00 AM (O3: 18.8/100).
Will air quality be worse tomorrow in Slabtown?
On 31 August 2026, air quality conditions in Slabtown will be similar to today, with AQI forecast at good at 19.7/100. Pollution peaks around 5:00 AM (O3: 19.7/100).
When is air pollution at its worst in Slabtown?
Like the rest of Portland, Slabtown sees air quality change through the year, as spring is often the freshest stretch, sandwiched between winter rain and summer fire season; by contrast, August and September wildfire smoke can dominate the season, occasionally driving particulate levels sharply higher for several days. Winter temperature inversions can briefly trap wood-smoke in low-lying valleys, but these episodes are usually short-lived.
Are air quality levels in Slabtown 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.
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Data provided by Airmine — Last update: 30 August 2026 at 14:32 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.
Some text on this page may be generated or summarised using artificial intelligence (AI). Wherever possible, AI-generated content is enriched with Airmine's proprietary data to improve its accuracy and relevance. However, AI-generated content may still contain errors, omissions, or inaccuracies.
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