Air quality in Valladolid, Castile and León, Spain today

Mr. Duck’s Air Quality Score

Good air today for Valladolid, Castile and León, 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 Valladolid today is classified as Good. The primary pollutant measured is PM2.5 (fine particles). According to the latest data shown via OpenAQ, the PM2.5 reference value stands at 4.0 µg/m³ while the PM10 reference value is 26.0 µg/m³, based on a set of 20 valid measurements.

These figures indicate that current concentrations are within the limits associated with 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 Valladolid includes measurements of carbon monoxide (CO), nitrogen oxide (NO), nitrogen dioxide (NO₂), ozone (O₃), particulate matter ≤ 10 µm (PM₁₀), particulate matter ≤ 2.5 µm (PM₂.₅) and sulphur dioxide (SO₂). In total 32 rows of data are available, coming from eight monitoring stations across the city. Freshness varies by pollutant: the most recent CO reading was recorded on 2026‑02‑09 15:00 UTC, while the latest NO value dates back to 2024‑01‑30 00:00 UTC; all other pollutants have their newest observations also from 2026‑02‑09 15:00 UTC. No rows are marked as unknown or very old, but a small portion (nine rows) are classified as “old” because they exceed the seven‑day freshness window.

Across the eight stations the observed concentrations show distinct patterns. NO ranges from 1 µg/m³ to 58 µg/m³ with a median of 17.5 µg/m³, indicating that most recent values sit near the lower end of the spread. NO₂ values are tighter, spanning 2‑32 µg/m³ and clustering around a median of 15.5 µg/m³. Ozone levels are consistently higher, between 41 µg/m³ and 70 µg/m³ with a median of 62 µg/m³, while PM₁₀ stays low, from 8 µg/m³ to 26 µg/m³ and a median of 10.5 µg/m³. The finest particles (PM₂.₅) are measured in a narrow band of 1‑4 µg/m³ with a median of just 2 µg/m³. SO₂ is reported from a single station at a constant 1 µg/m³, and CO appears only once, recorded at 400 µg/m³.

These figures illustrate that while most pollutants have recent data covering several stations, the coverage is uneven: CO, SO₂ and PM₂.₅ each rely on a single observation point, whereas NO, NO₂, O₃ and PM₁₀ benefit from multiple readings. Consequently, city‑wide conditions can differ by location and time, especially for those pollutants with limited station representation.

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 Valladolid includes 20 valid measurements and is refreshed Updated within 3 days, with the latest values recorded on 2026‑02‑09T15:00:00+00:00. This snapshot reflects conditions at the time of collection; air quality can vary across different neighborhoods and times of day within the city, so individual experiences may differ from the reported figures.

OpenAQ station rows