Air quality in Castelló de la Plana, Valencian Community, Spain today

Mr. Duck’s Air Quality Score

Good air today for Castelló de la Plana, Valencian Community, 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 today in Castelló de la Plana is classified as Good. The main pollutant identified is PM2.5 (fine particles). Measurements show a PM2.5 reference value of 6.0 µg/m³ and a PM10 reference value of 23.0 µg/m³, based on 26 valid observations collected via OpenAQ.

These figures indicate that the current concentrations are within the range associated with the Good category for this location. 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 air‑quality dataset for Castelló de la Plana contains measurements for carbon monoxide (CO), nitrogen oxides (NO and NO₂), ozone (O₃), particulate matter (PM₁₀ and PM₂.₅) and sulphur dioxide (SO₂). In total there are 30 data rows drawn from five monitoring sites across the city, so each pollutant is not necessarily represented at every location. The most recent observations were recorded on 2026‑02‑09 15:00 UTC for CO, NO₂, O₃, SO₂, PM₁₀ and PM₂.₅, while nitrogen monoxide (NO) is only available from an older record dated 2024‑01‑16 22:00 UTC.

Across the recent entries the measured values show a fairly wide spread for some gases and a tighter band for others. NO₂ ranges from a low of 3 µg/m³ to a high of 19 µg/m³, with a median of 8 µg/m³; O₃ varies between 47 and 82 µg/m³, centred around 64 µg/m³; SO₂ is confined to the 3‑9 µg/m³ interval, with a constant median of 3 µg/m³. Particulate matter also displays modest variability: PM₁₀ spans 3‑27 µg/m³ (median 13) and PM₂.₅ covers 1‑6 µg/m³ (median 3). CO is reported as a single value of 100 µg/m³ from the sports complex site.

The dataset is dominated by recent measurements – 26 of the 30 rows were updated within the last seven days – but the presence of one older NO record and four rows classified as “unknown” means that coverage is uneven both temporally and spatially. Consequently, while the available numbers give a snapshot of current conditions at specific points in Castelló de la Plana, they do not capture the full city‑wide picture at any single 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 dataset for Castelló de la Plana includes 26 valid measurements and was refreshed Updated within 3 days, with the most recent data recorded on 2026‑02‑09 at 15:00 UTC. These values represent a snapshot of ambient conditions captured by the monitoring network; actual air quality can differ across neighborhoods and change throughout the day, so local variations may not be reflected in this summary.

OpenAQ station rows