Reported by AIRNOW today.
It is the strongest of the 47 detections recorded within 20 km of this point since 18 April 2026. The last comparable one was on 31 August 2026.
What the source measured
AIRNOW reported: AQI: 143 (Unhealthy for Sensitive Groups) · PM2.5 AQI: 55 · Ozone AQI: 143
An estimated 1,312,076 people live within 5 km of this point.
Nearby, since 18 April 2026
- August 31, 2026 · score 37 · 0.0 km
- August 21, 2026 · score 14 · 0.0 km
- May 14, 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 50 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 | low |
| Calamity Score (ours) | 50 / 100 |
| Our confidence | 70% |
| Coordinates | 29.7510, -95.3510 |
| Nearest City | Houston (1 km) |
| Population Exposed | 1.3M within 5 km |
| Impact Tier | minor |
| Timestamp | 2026-09-01T00:00:00.000Z |
| Source | https://www.airnow.gov/ |
Score Breakdown
Technical Details
| Aqi | 143 |
| Pm25Aqi | 55 |
| OzoneAqi | 143 |
| CategoryName | Unhealthy for Sensitive Groups |
| 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 50/100, near Houston (United States), based on data from airnow. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.