Air quality in Trieste, Friuli – Venezia Giulia, Italy today
Mr. Duck’s Air Quality Score
Good air today for Trieste, Friuli – Venezia Giulia, Italy
This friendly indicator summarizes the latest city readings. For health guidance, please see: EPA AirNow or WHO.
Air quality today
The air quality in Trieste today is classified as Good. The primary pollutant measured is PM10, with a reference value of 4.5 µg/m³ based on five valid observations.
PM10 levels are reported within the range indicated by the reference value, confirming that conditions meet the criteria for the Good category. 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 Trieste includes six measured pollutants – carbon monoxide (CO), nitrogen oxide (NO), nitrogen dioxide (NO₂), ozone (O₃), particulate matter 10 µm or less (PM₁₀) and sulphur dioxide (SO₂). Across the city there are nine data rows coming from three monitoring stations, but the coverage is uneven: PM₁₀, NO, NO₂ and SO₂ each have two recent observations, while O₃, CO and SO₂ are represented by a single row.
Freshness varies by pollutant. The most up‑to‑date records were logged on 2026‑02‑07 20:00 UTC for PM₁₀ (Trieste – Sincrotrone), NO₂ (Trieste – P.zza Volontari Giuliani) and SO₂ (Trieste – P.le Rosmini). The O₃ value is older, recorded on 2025‑12‑31 09:00 UTC, and the CO reading dates from 2026‑01‑16 09:00 UTC. NO has the oldest timestamp in the set, last updated on 2024‑03‑11 10:00 UTC.
The numeric spread shows that PM₁₀ concentrations range from a low of 0.91 µg/m³ to a high of 4.5 µg/m³, with a median around 2.7 µg/m³. NO values sit between 13.35 and 29.19 µg/m³ (median 21.27), while NO₂ varies from 39.03 to 62.36 µg/m³ (median 50.70). O₃, CO and SO₂ each have a single reported value – 79.2 µg/m³ for ozone, 820 µg/m³ for carbon monoxide and 5.85 µg/m³ for sulphur dioxide.
Overall the dataset provides recent information for most pollutants, but some measurements rely on only one or two stations and include older timestamps. Consequently, conditions in Trieste can differ across neighborhoods and times, and the available data capture only a snapshot of that variability.
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 Trieste includes five valid measurements and is marked as Updated within 7 days, with the latest values recorded on 2026‑02‑07T20:00:00+00:00. These figures represent a brief snapshot of ambient conditions; air quality can differ across neighborhoods and change throughout the day, so this information may not reflect current or location‑specific levels at any given moment.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| Trieste - Sincrotrone | o3 | 79.2 | µg/m³ | 2025-12-31 09:00 UTC |
| Trieste - Sincrotrone | pm10 | 0.91 | µg/m³ | 2026-02-07 20:00 UTC |
| Trieste - P.zza Volontari Giuliani | no | 29.19 | µg/m³ | 2024-03-11 10:00 UTC |
| Trieste - P.zza Volontari Giuliani | no2 | 62.36 | µg/m³ | 2026-02-07 20:00 UTC |
| Trieste - P.zza Volontari Giuliani | pm10 | 4.5 | µg/m³ | 2026-02-07 20:00 UTC |
| Trieste - P.le Rosmini | no | 13.35 | µg/m³ | 2024-03-11 10:00 UTC |
| Trieste - P.le Rosmini | no2 | 39.03 | µg/m³ | 2026-02-07 20:00 UTC |
| Trieste - P.le Rosmini | so2 | 5.85 | µg/m³ | 2026-02-07 20:00 UTC |