PM2.5 observation snapshot
4.2 µg/m³ · 30 sensors
Prepared:
Values refer to the stated observation times. Open the map for the latest readings.
Open mapVarna Air Quality — PM2.5 & Sensors
Bulgaria
Sensors and observation times
| Sensor | PM2.5 (µg/m³) | UTC |
|---|---|---|
| SC #100439 | 6.6 | |
| SC #5965 | 4.3 | |
| SC #86589 | 3.9 | |
| SC #80852 | 5.4 | |
| SC #77838 | 2.7 | |
| SC #82752 | 2.7 | |
| SC #63203 | 2.5 | |
| SC #86597 | 4.7 | |
| SC #93599 | 10.4 | |
| SC #69299 | 2.7 | |
| SC #39946 | 1.9 | |
| SC #97133 | 2.1 | |
| SC #83665 | 0.4 | |
| SC #96726 | 1.4 | |
| SC #67798 | 3.7 | |
| SC #90526 | 1.8 | |
| SC #47938 | 18.9 | |
| SC #56269 | 2.1 | |
| SC #89206 | 1.7 | |
| SC #10309 | 3.0 | |
| SC #58372 | 0.0 | |
| SC #32455 | 3.9 | |
| SC #93575 | 3.4 | |
| SC #56705 | 7.7 | |
| SC #19774 | 0.3 | |
| SC #9763 | 2.2 | |
| SC #28313 | 19.2 | |
| SC #96954 | 1.9 | |
| SC #88546 | 3.1 | |
| SC #42502 | 1.8 |
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