Air quality in Shumen, Shumen, Bulgaria today
Mr. Duck’s Air Quality Score
Good air today for Shumen, Shumen, 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 Shumen today is classified as Good. The primary pollutant identified is PM10, and the reference value for this particle size is 16.5 µg/m³. Measurements from four valid monitoring points were used to determine the assessment.
Data are shown via OpenAQ and reflect the current conditions without additional interpretation. 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 dataset for Shumen contains five measurement rows, one for each of the pollutants NO, NO₂, O₃, PM10 and SO₂, all reported by a single AMS Shumen monitoring site. For each pollutant there is a single recorded value, so the minimum, median and maximum are identical: NO registers 3.03 µg/m³, NO₂ 28.24 µg/m³, O₃ 27.79 µg/m³, PM10 16.5 µg/m³ and SO₂ 3.86 µg/m³. Because only one observation per pollutant is present, there is no statistical spread to describe; the reported figure represents both the typical and extreme reading for that moment.
The timestamps show a clear difference in data freshness across the set. The four newer pollutants (NO₂, O₃, PM10 and SO₂) were last updated on 2026‑02‑10 at 19:00 UTC, which falls within the “updated within three days” category. In contrast, the NO measurement is older, dated 2024‑03‑11 at 11:00 UTC, and is flagged as old data. This means that while most of the current snapshot reflects very recent conditions, the nitrogen monoxide value does not.
With only one monitoring location contributing all five rows, the coverage for Shumen is limited to a single point in the city. Consequently, spatial variations in air quality across different neighborhoods are not captured by this dataset. Users should keep in mind that the figures represent conditions at the AMS Shumen site at the recorded times and may not reflect broader or more recent changes elsewhere in the city.
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 Shumen reflects four valid measurements and was refreshed within three days, with the latest update recorded at 2026‑02‑10 19:00 UTC. These values provide a recent snapshot of citywide air quality but may not capture short‑term fluctuations or differences between neighborhoods. Conditions can change quickly, so local variations in time and place are possible.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| AMS Shumen | no | 3.03 | µg/m³ | 2024-03-11 11:00 UTC |
| AMS Shumen | no2 | 28.24 | µg/m³ | 2026-02-10 19:00 UTC |
| AMS Shumen | o3 | 27.79 | µg/m³ | 2026-02-10 19:00 UTC |
| AMS Shumen | pm10 | 16.5 | µg/m³ | 2026-02-10 19:00 UTC |
| AMS Shumen | so2 | 3.86 | µg/m³ | 2026-02-10 19:00 UTC |