Air quality in Sliven, Sliven, Bulgaria today
Mr. Duck’s Air Quality Score
Good air today for Sliven, Sliven, 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 Sliven is classified as Good today. The primary pollutant measured is PM10, and the recorded reference value for this particle size is 16.03 micrograms per cubic meter.
Two valid measurements were taken to determine these values, and they are presented through OpenAQ data. 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 air‑quality record for Sliven draws from two recent sensor readings supplied by OpenAQ. Both pollutants are represented by a single measurement each, so the dataset covers one monitoring station – AMS Sliven – and provides a snapshot rather than a network of sites.
For particulate matter, the PM10 concentration is reported as 16.03 µg/m³, with the same value recorded as the minimum, median and maximum across the available data. Sulphur dioxide shows a uniform reading of 6.7 µg/m³, again identical for its minimum, median and maximum. Because each pollutant has only one row, there is no spread to describe; the reported figures are both the typical and extreme values for the current period.
All observations were last updated on 2026‑02‑10 at 19:00 UTC, which falls within the “updated within three days” freshness window. This means the data reflect conditions from just a few days ago, but the limited number of rows – only two in total – indicates that broader spatial or temporal coverage is not available for Sliven at this time. Consequently, while the figures give an immediate picture of air quality at the AMS Sliven site, they do not capture variations that might occur elsewhere in the city or over longer periods.
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 Sliven reflects two valid measurements and is updated within 3 days, with the most recent reading recorded on 2026‑02‑10 at 19:00 UTC. While this snapshot provides a current view of citywide 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 |
|---|---|---|---|---|
| AMS Sliven | pm10 | 16.03 | µg/m³ | 2026-02-10 19:00 UTC |
| AMS Sliven | so2 | 6.7 | µg/m³ | 2026-02-10 19:00 UTC |