Air quality in Sant Celoni, Catalonia, Spain today

Mr. Duck’s Air Quality Score

Good air today for Sant Celoni, Catalonia, Spain

⚠️ 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 Sant Celoni today is classified as Good. The primary pollutant identified is PM2.5 (fine particles).

Measurements from seven valid monitoring points show a PM2.5 reference value of 6.0 and a PM10 reference value of 7.0. These figures 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 Sant Celoni monitoring network currently provides data for seven separate pollutant measurements – nitrogen monoxide (NO), nitrogen dioxide (NO₂), combined nitrogen oxides (NOX), ozone (O₃), particulate matter up to 10 µm (PM₁₀), fine particulate matter up to 2.5 µm (PM₂.₅) and sulphur dioxide (SO₂). All of these values come from a single reporting station identified as SANT CELONI (CARLES DAMM); the dataset therefore contains one row per pollutant, giving a total of seven rows of recent observations.

Each pollutant’s most recent reading was recorded on 2026‑02‑10 at 03:00 UTC, so the data are fresh within the last week. The reported concentrations are all identical across their statistical summaries – the minimum, median and maximum values match exactly for each compound. NO is measured at 1.0 µg/m³, NO₂ at 9.0 µg/m³, NOX at 10.0 µg/m³, O₃ at 39.0 µg/m³, PM₁₀ at 7.0 µg/m³, PM₂.₅ at 6.0 µg/m³ and SO₂ at 2.0 µg/m³. Because each metric shows a single value rather than a range, the spread (10th‑90th percentile) is also flat, indicating that only one observation per pollutant is currently available.

The dataset therefore offers complete coverage of the listed seven pollutants but from a very limited spatial perspective – all measurements originate from the same monitoring site. While the timestamps are recent, the lack of multiple stations or repeated observations means the picture of air quality in Sant Celoni is constrained to this single point in time and location. Users should keep in mind that conditions can differ across neighborhoods and over longer periods, even though the present data are up‑to‑date for the recorded moment.

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 Sant Celoni is based on seven valid measurements and was refreshed recently, with the latest update recorded at 2026‑02‑10T03:00:00+00:00 (updated within 3 days). This snapshot reflects conditions captured by those sensors at that time; air quality can vary across different neighborhoods and change throughout the day, so values may differ from what you experience in other parts of the city.

OpenAQ station rows