Air Quality near Semarang
Right now
The most recent data we hold from World Air Quality Index arrived 2 hours ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Nothing else has been detected within 20 km in the last 24 hours.
Reported by World Air Quality Index yesterday.
No stronger detection stands among the 5 recorded within 20 km of this point since 18 June 2026 — 2 others scored the same. The last comparable one was on 3 September 2026.
What the source measured
World Air Quality Index reported: AQI 153 (Unhealthy) at Semarang, Indonesia
The air quality index read 153 (Unhealthy) at the Semarang, Indonesia station.
An estimated 120,730 people live within 5 km of this point.
Nearby, since 18 June 2026
- September 3, 2026 · score 50 · 0.0 km
- September 2, 2026 · score 50 · 0.0 km
- August 27, 2026 · score 35 · 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 50 out of 100, at 65 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v4. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Air Quality |
| Severity | Medium |
| Calamity Score (ours) | 50 / 100 |
| Our confidence | 65% |
| Coordinates | -6.9850, 110.3810 |
| Nearest City | Semarang (4 km) |
| Population Exposed | 120.7K within 5 km |
| Impact Tier | significant |
| Timestamp | 2026-09-04T21:00:00.000Z |
| Source | https://aqicn.org/city/@13651 |
Score Breakdown
Technical Details
| Aqi | 153 |
| AqiCategory | Unhealthy |
| StationName | Semarang, Indonesia |
| StationUid | 13651 |
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.
Want to know when something happens near Semarang?
Calamity.live data shows a air quality event with CalamityScore 50/100, near Semarang (Indonesia), based on data from waqi. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.