Right now
The most recent data we hold from World Air Quality Index arrived 2 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
One other detection within 20 km in the last 24 hours, <1 km from here.
Reported by World Air Quality Index today.
It is one of only 2 we have recorded within 20 km of this point since 9 August 2026. The last comparable one was on 25 September 2026. One more was recorded here in the fortnight before it.
What the source measured
World Air Quality Index reported: AQI 407 (Hazardous) at Metaline, Kennewick, Washington, USA
The air quality index read 407 (Hazardous) at the Metaline, Kennewick, Washington, USA station.
Urban PEI: 41,964 within a heuristic 5 km radius; not unique people.
Nearby, since 9 August 2026
- September 25, 2026 · score 41 · 0.0 km
How we know
One source: World Air Quality Index. Not yet confirmed by a second, independent source.
Our own score for this event is 58 out of 100.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
Computed under scoring rules v5. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Air Quality |
| Severity | Critical |
| Calamity Score (ours) | 58 / 100 |
| Legacy data-support index | 0.68/1 |
| Coordinates | 46.2184, -119.2015 |
| Nearest City | Tri-Cities (4 km) |
| Urban exposure index (PEI) | 42.0K within 5 km |
| Impact Tier | significant |
| Timestamp | 2026-09-26T01:00:00.000Z |
| Source | https://aqicn.org/city/@113 |
Physical priority index · v5. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: waqi. Occurrence: 2026-09-26T01:00:00.000Z.
First archived: 2026-09-25T23:53:50.454Z. Material modification: 2026-09-26T00:52:13.777Z.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
2026-09-26T00:52:13.777Z · data_change
Index 48 → 58; severity high → critical; version 5 → 5.
2026-09-26T00:25:55.175Z · data_change
Index 48 → 48; severity high → high; version 5 → 5.
Score Breakdown
Technical Details
| Aqi | 407 |
| AqiCategory | Hazardous |
| StationName | Metaline, Kennewick, Washington, USA |
| StationUid | 113 |
| Network | official |
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 8 March 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.
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