Air quality in Sibiu, Romania today

Mr. Duck’s Air Quality Score

Good air today for Sibiu, Romania

⚠️ 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 Sibiu is currently classified as Good. The main pollutant identified is PM2.5, with a measured concentration of approximately 4.31 µg/m³. A concurrent measurement for PM10 shows a level near 8.86 µg/m³, based on ten valid observations.

Data are shown via OpenAQ and reflect the latest available readings. 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 Sibiu air‑quality feed currently contains data for ten measured substances: carbon monoxide (CO), nitrogen dioxide (NO₂), ozone (O₃), particulate matter of three size fractions (PM₁, PM₂·₅ and PM₁₀), sulfur dioxide (SO₂), relative humidity and temperature. These values come from 15 individual rows collected at four monitoring sites across the city. For most pollutants the latest reading was recorded on 2026‑02‑10 19:00 UTC; the two particulate size fractions and humidity were last updated a little later, on 2026‑02‑10 20:00 UTC. Overall, ten of the fifteen rows have been refreshed within the past seven days, while five are older than that period.

Across the recent observations the recorded concentrations show a fairly wide spread. Ozone values range from about 27.6 to 76.9 µg/m³ with a median near 40.2 µg/m³, indicating notable variability in this pollutant. Nitrogen dioxide is more tightly clustered, ranging from 18.4 to 29.4 µg/m³ and centering around a median of 23.9 µg/m³. Particulate matter also displays contrast: PM₁₀ spans from roughly 8.9 to 92.1 µg/m³ with a median of 50.5 µg/m³, whereas the single‑point measurements for PM₁ and PM₂·₅ are both low (2.3 µg/m³ and 4.3 µg/m³ respectively) because they come from only one station. Sulfur dioxide stays between 5.5 and 8.7 µg/m³, with a median of 7.1 µg/m³, while carbon monoxide is reported as a constant 125.25 µg/m³ at the SB‑1 site.

The dataset therefore offers recent, multi‑pollutant coverage but with uneven depth: some substances (O₃, NO₂, PM₁₀, SO₂) are measured at several locations and show broader temporal updates, whereas others (PM₁, PM₂·₅, relative humidity) rely on a single station’s snapshot. Because five rows are older than a week, the picture of Sibiu’s air quality can change between monitoring points and over time, so conditions may differ across neighborhoods and moments not captured by the latest timestamps.

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 Sibiu is based on ten valid measurements and was refreshed recently, with the latest update recorded at 2026‑02‑10T20:00:00+00:00 (updated within 3 days). This snapshot reflects conditions at the time of collection; air quality can vary across different neighborhoods and times of day within the city.

OpenAQ station rows