Air quality in Bistritsa, Sofia-City, Bulgaria today
Mr. Duck’s Air Quality Score
Moderate air today for Bistritsa, Sofia-City, Bulgaria
This friendly indicator summarizes the latest city readings. For health guidance, please see: EPA AirNow or WHO.
Air quality today
The air quality in Bistritsa today is classified as Moderate. The primary pollutant identified is PM2.5 (fine particles). Measurements show a PM2.5 concentration of 33.70 µg/m³ based on five valid readings reported through OpenAQ.
No additional pollutants reached reporting thresholds, and the data set consists of five validated observations. This page is informational; for health guidance, use official sources such as EPA AirNow or WHO.
Latest sensor values
PM categories follow US EPA AQI breakpoints, shown here as an estimate derived from the latest valid measurements (this project does not compute EPA NowCast/24-hour AQI yet).
What the data includes
The Bistritsa monitoring site provides data for five measured variables: PM1, PM2.5, relative humidity, temperature and particle count (UM003). All five appear in a single row of OpenAQ data, meaning the city’s public air‑quality record is based on one sensor location rather than a network of stations.
The most recent observation for each pollutant was recorded at 2026-02-10 22:00 UTC, so the dataset reflects conditions from just a few days ago and is classified as “updated within 3 days.” Because there is only one row, the reported values are both the minimum and maximum for the period covered. PM1 registers at 18.813666598002115 µg/m³, while PM2.5 shows 33.70250018437704 µg/m³. Relative humidity is measured at 52.67516676584879 %, temperature at 5.230666637420654 °C and the particle counter (UM003) reads 887.971667989095 particles/cm³.
With a single measurement point, the data set lacks spatial variation; any changes across different neighborhoods of Bistritsa cannot be captured here. The uniform timestamps also mean there is no temporal spread to assess trends – each pollutant has only one recorded value, which serves as both its median and its extreme. Consequently, while the figures give a snapshot of current atmospheric conditions, they do not reveal how those conditions might differ elsewhere in the city or evolve over time.
Learn more about sources and filtering: About the data.
Trusted references: WHO (Air pollution) · US EPA AirNow · European Environment Agency (Air)
Latest sensor values (bars)
PM categories follow US EPA AQI breakpoints, shown here as an estimate derived from the latest valid measurements (this project does not compute EPA NowCast/24-hour AQI yet).
Data notes
The data shown for Bistritsa reflects five valid measurements and is updated within three days, with the most recent reading recorded on 2026‑02‑10 at 22:00 UTC. While this snapshot provides a current view of air quality, conditions can differ across neighborhoods and change throughout the day, so local variations may not be captured in these figures.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| Bistritsa | pm1 | 18.813666598002115 | µg/m³ | 2026-02-10 22:00 UTC |
| Bistritsa | pm25 | 33.70250018437704 | µg/m³ | 2026-02-10 22:00 UTC |
| Bistritsa | relativehumidity | 52.67516676584879 | % | 2026-02-10 22:00 UTC |
| Bistritsa | temperature | 5.230666637420654 | c | 2026-02-10 22:00 UTC |
| Bistritsa | um003 | 887.971667989095 | particles/cm³ | 2026-02-10 22:00 UTC |