Air quality in Stara Zagora, Stara Zagora, Bulgaria today

Mr. Duck’s Air Quality Score

Good air today for Stara Zagora, Stara Zagora, Bulgaria

⚠️ This website is currently under active development. Some data may be incomplete or temporarily inaccurate. For health-critical decisions, please verify information through official government or environmental sources.

Categories follow US EPA AQI breakpoints for PM (estimate from latest valid measurements; this project does not compute EPA NowCast/24-hour AQI yet).

This friendly indicator summarizes the latest city readings. For health guidance, please see: EPA AirNow or WHO.

Air quality today

The air quality in Stara Zagora is currently classified as Good. The primary pollutant measured today is PM10. Data are shown via OpenAQ, which compiles observations from the city’s monitoring network.

Four valid measurements were recorded, indicating a PM10 concentration of 11.84 µg/m³. No other pollutants are reported as dominant for this assessment. 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 OpenAQ feed for Stara Zagora currently contains data from three monitoring sites spread across 21 individual sensor readings. All of the listed pollutants are represented: carbon monoxide (CO), nitrogen dioxide (NO₂), ozone (O₃), particulate matter in four size fractions (PM1, PM2.5, PM4 and PM10) as well as temperature. The most recent measurements were recorded on 2026‑02‑10 at 19:00 UTC for CO, NO₂ and O₃, while the newest values for all particle sizes and temperature date back to 2023‑06‑20 at 10:40 UTC. This means that half of the dataset is more than two years old, and only three pollutants have been updated within the last few days.

Across the recent readings, CO is reported at a single value of 580 µg/m³, NO₂ at 31.71 µg/m³ and O₃ at 28.15 µg/m³, each coming from the AMS Zelen klin‑Stara Zagora station. Particulate matter shows a broader range: PM10 values span from 1.1 to 11.84 µg/m³ with a median of 8.55 µg/m³; PM2.5 ranges from 0.67 to 32.11 µg/m³, also medalling at 8.55 µg/m³; PM1 varies between 7.75 and 16.25 µg/m³ with a median of 8.09 µg/m³; and PM4 is confined between 5.24 and 8.55 µg/m³, median 6.90 µg/m³. Temperature records show a minimum of about 6.2 °C, a maximum of 28.47 °C and a median near 17.35 °C.

The data set therefore offers a fairly complete picture of the main gaseous pollutants but provides only older snapshots for particulate matter and temperature. Because many rows are classified as “old” or “unknown,” conditions in Stara Zagora can differ noticeably across neighborhoods and over time, especially for particles that are not being refreshed daily. Users should keep in mind that the freshest information is limited to three gases measured at a single location on 2026‑02‑10.

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 dataset for Stara Zagora includes four valid measurements and was refreshed recently, with the latest update recorded on 2026‑02‑10 at 19:00 UTC; it is therefore considered “Updated within 3 days.” While this snapshot reflects current conditions across the monitoring sites, air quality can differ by specific location and time of day within the city, so values may vary locally.

OpenAQ station rows