Air quality in Sondrio, Lombardy, Italy today

Mr. Duck’s Air Quality Score

Moderate air today for Sondrio, Lombardy, Italy

⚠️ 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 Sondrio today is classified as Moderate. The primary pollutant identified is PM2.5 (fine particles). Measurements from four monitoring stations show a PM2.5 reference value of 15.0 µg/m³ and a PM10 reference value of 18.3 µg/m³.

Data are shown via OpenAQ, reflecting the latest available readings for the city. 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 Sondrio air‑quality dataset contains measurements for six pollutants – carbon monoxide (CO), nitrogen dioxide (NO₂), ozone (O₃), particulate matter ≤10 µm (PM10), particulate matter ≤2.5 µm (PM2.5) and sulphur dioxide (SO₂). The data come from two monitoring stations, providing a total of eight individual rows. For NO₂, PM10, O₃ and PM2.5 the most recent observations were recorded on 2026‑02‑08 at 19:00 UTC, so these four pollutants have fresh values that are less than a week old. CO and SO₂, by contrast, were last updated on 2026‑01‑22 at 10:00 UTC, meaning the latest information for those two gases is about one month old.

Across the eight rows the recorded concentrations show modest variability. NO₂ ranges from 30.20 to 46.74 µg/m³ with a median of 38.47 µg/m³; PM10 varies between 18.3 and 20.77 µg/m³, median 19.53 µg/m³. The single‑value entries for CO (677.58 µg/m³), SO₂ (1.64 µg/m³) and O₃ (13.95 µg/m³) reflect that only one recent measurement is available for each of those pollutants at the respective stations. PM2.5 also has a single reported value of 15.0 µg/m³.

Because the dataset includes just two sites, spatial coverage within Sondrio is limited and conditions can differ across neighborhoods. Moreover, the older timestamps for CO and SO₂ mean that current levels for those gases are less certain than for NO₂, PM10, O₃ and PM2.5, which benefit from more recent updates.

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 Sondrio are based on four valid measurements and have been refreshed recently, with the latest update recorded at 2026‑02‑08T19:00:00+00:00 (updated within 3 days). This snapshot reflects conditions at the time of sampling; air quality can differ across neighborhoods and change throughout the day, so values may not represent every location or moment in the city.

OpenAQ station rows