Reported by AIRNOW yesterday.
No stronger detection stands among the 49 recorded within 20 km of this point since 18 April 2026 — one other scored the same. The last comparable one was on 31 August 2026.
What the source measured
AIRNOW reported: AQI: 215 (Very Unhealthy) · PM2.5 AQI: 54 · Ozone AQI: 215
An estimated 1,312,076 people live within 5 km of this point.
Nearby, since 18 April 2026
- September 1, 2026 · score 66 · 0.0 km
- August 31, 2026 · score 37 · 0.0 km
- August 21, 2026 · score 14 · 0.0 km
How we know
One source: AIRNOW. Not yet confirmed by a second, independent source.
Our own score for this event is 66 out of 100, at 70 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Air quality |
| Severity | high |
| Calamity Score (ours) | 66 / 100 |
| Our confidence | 70% |
| Coordinates | 29.7510, -95.3510 |
| Nearest City | Houston (1 km) |
| Population Exposed | 1.3M within 5 km |
| Impact Tier | severe |
| Timestamp | 2026-09-01T00:00:00.000Z |
| Source | https://www.airnow.gov/ |
Score Breakdown
Technical Details
| Aqi | 215 |
| Pm25Aqi | 54 |
| OzoneAqi | 215 |
| CategoryName | Very Unhealthy |
| ReportingArea | Houston-Galveston-Brazoria |
| StateCode | TX |
| City | Houston |
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.
Want to know when something happens near Houston?
Calamity.live data shows a air quality event with CalamityScore 66/100, near Houston (United States), based on data from airnow. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.