Air quality in Rieti, Lazio, Italy today
Mr. Duck’s Air Quality Score
Moderate air today for Rieti, Lazio, Italy
This friendly indicator summarizes the latest city readings. For health guidance, please see: EPA AirNow or WHO.
Air quality today
The air quality today in Rieti is classified as Moderate. The primary pollutant identified is PM2.5 (fine particles).
Measurements from eight valid sampling points show a PM2.5 concentration of 12.0 µg/m³ and a PM10 level of 14.0 µg/m³, matching the reference values used for assessment. 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 Rieti air‑quality record draws on three monitoring sites that together provide fifteen individual data rows covering eight key pollutants: carbon monoxide (CO), nitrogen oxide (NO), nitrogen dioxide (NO₂), total nitrogen oxides (NOX), ozone (O₃), particulate matter ≤ 10 µm (PM10), particulate matter ≤ 2.5 µm (PM2.5) and sulfur dioxide (SO₂). The freshest observations are from early February 2026, with most parameters updated within the last seven days; only ozone is older, its latest entry dating to 2024‑05‑16. CO data are the oldest, last refreshed on 2022‑12‑28.
Across the recent sample, NO₂ values range from a low of 4.0 µg/m³ to a high of 16.0 µg/m³, with a median of 8.0 µg/m³ and the central 80 % of readings falling between roughly 4.8 and 14.4 µg/m³. SO₂ is consistently low, spanning 1.1 to 1.8 µg/m³ (median 1.3 µg/m³) and tightly clustered within its 10th‑90th percentile band of 1.14–1.70 µg/m³. PM10 and PM2.5 each have a single reported value—14.0 µg/m³ for PM10 and 12.0 µg/m³ for PM2.5—both recorded on 2026‑02‑08, indicating limited temporal depth for these particulates. NO registers at zero across its recent entry, while NOX is fixed at 6.0 µg/m³, both updated on 2026‑02‑09.
The dataset shows an uneven distribution of freshness: five pollutants (NO₂, SO₂, NO, NOX, PM10, PM2.5) have measurements from the past week, whereas ozone and carbon monoxide rely on older records. This mix of recent and dated points means that while short‑term conditions for most gases are well captured, the picture for ozone and CO is less current, and spatial variation may be underrepresented given only three stations serve the whole 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 Rieti reflects eight valid measurements and was updated within 3 days, with the latest refresh recorded at 2026‑02‑09T03:00:00+00:00. These values provide a recent snapshot of ambient air quality across the city, but conditions can differ by neighbourhood and change throughout the day, so individual experiences may vary from the reported figures.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| Rieti 1 | no | 0.0 | µg/m³ | 2026-02-09 00:00 UTC |
| Rieti 1 | no2 | 8.0 | µg/m³ | 2026-02-09 00:00 UTC |
| Rieti 1 | nox | 6.0 | µg/m³ | 2026-02-09 00:00 UTC |
| Rieti 1 | o3 | 15.0 | µg/m³ | 2022-12-28 13:00 UTC |
| Rieti 1 | pm10 | 14.0 | µg/m³ | 2026-02-08 00:00 UTC |
| Rieti 1 | pm25 | 12.0 | µg/m³ | 2026-02-08 00:00 UTC |
| Rieti 1 | so2 | 1.3 | µg/m³ | 2026-02-09 00:00 UTC |
| IT0867A | no2 | 16.0 | µg/m³ | 2024-01-29 02:00 UTC |
| IT0867A | o3 | 15.0 | µg/m³ | 2022-12-28 13:00 UTC |
| IT0867A | so2 | 1.8 | µg/m³ | 2024-01-29 17:00 UTC |
| RIETI | no2 | 4.0 | µg/m³ | 2026-02-09 03:00 UTC |
| RIETI | so2 | 1.1 | µg/m³ | 2026-02-09 03:00 UTC |