Air quality near Gresham
Reported by World Air Quality Index today.
It is the 4th strongest of the 5 detections recorded within 20 km of this point since 9 March 2026. The last comparable one was on 4 August 2026.
What the source measured
World Air Quality Index reported: AQI 163 (Unhealthy) at Gresham Centennial High School
The air quality index read 163 (Unhealthy) at the Gresham Centennial High School station.
An estimated 9,476 people live within 5 km of this point.
This is the lowest air quality index we have recorded at this point, over 12 readings since 1 September 2026 — the previous range was 163 to 219.
How we know
One source: World Air Quality Index. Not yet confirmed by a second, independent source.
Our own score for this event is 14 out of 100, at 67 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Air quality |
| Severity | medium |
| Calamity Score (ours) | 14 / 100 |
| Our confidence | 67% |
| Coordinates | 45.4962, -122.4834 |
| Nearest City | Gresham (4 km) |
| Population Exposed | 9.5K within 5 km |
| Impact Tier | significant |
| Timestamp | 2026-09-01T05:00:00.000Z |
| Source | https://aqicn.org/city/@-503617 |
Score Breakdown
Technical Details
| Aqi | 163 |
| AqiCategory | Unhealthy |
| StationName | Gresham Centennial High School |
| StationUid | -503617 |
Safety Information
When air quality is hazardous: stay indoors with windows closed, and run a filtered air purifier if you have one. Avoid outdoor exercise. Children, older adults and anyone with heart or lung conditions are affected first and worst — an N95 respirator helps outdoors, a cloth mask does not.
Series begins 10 February 2026. Comparisons refer to that period only. Collection gap: 14-26 August 2026.
This data is aggregated algorithmically from scientific sources. Not a replacement for official emergency warnings.
Calamity.live data shows a air quality event with CalamityScore 14/100, near Gresham (United States), based on data from waqi. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.