PM2.5 observation snapshot
10.2 µg/m³ · 4 sensors
Prepared:
Values refer to the stated observation times. Open the map for the latest readings.
Open mapSofia Air Quality — PM2.5 & Sensors
Bulgaria
Sensors and observation times
| Sensor | PM2.5 (µg/m³) | UTC |
|---|---|---|
| Sofia, 13 Dimitar Petkov Str. | 11.8 | |
| Ovcha Kupel 1 | 13.0 | |
| Ovcha Кupel | 2.5 | |
| Mladost 1 | 13.3 |
Methodology and limitations
The value is the arithmetic mean of the latest available individual sensor observations, each at most one hour old when the snapshot was prepared. It is neither a 24-hour average nor an AQI index.
Duplicate sensor records do not increase their weight. Missing, negative and PM2.5 readings above 500 µg/m³ are excluded under the Atmy quality rule. Pilot cities require at least three qualifying sensors. Sensor count does not guarantee uniform coverage or laboratory accuracy.
Source: public Atmy monitoring data. Data terms