Air quality in Aalborg, North Denmark Region, Denmark today

Mr. Duck’s Air Quality Score

Unhealthy for sensitive groups for Aalborg, North Denmark Region, Denmark

⚠️ 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 Aalborg today falls within the USG (Unhealthy for Sensitive Groups) category. The primary pollutant identified is fine particulate matter, PM2.5, with a measured concentration of 48.25 µg/m³ based on five valid observations reported through OpenAQ.

No additional pollutants are highlighted for this 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 dataset for Aalborg pulls information from eleven rows collected at three monitoring stations. It includes measurements of nitrogen dioxide (NO₂), nitric oxide (NO), ozone (O₃), sulfur dioxide (SO₂), particulate matter sized ≤ 1 µm (PM₁), ≤ 10 µm (PM₁₀), and ≤ 2.5 µm (PM₂.₅), as well as relative humidity. For NO₂ the values range from 0 µg/m³ to 3.2 µg/m³ with a median of 1.6 µg/m³, while NO is reported at a single value of 10.68 µg/m³ across all rows. O₃ and SO₂ both show a constant reading of 0 µg/m³ and –1 µg/m³ respectively, indicating no recent updates for these gases. Particulate matter shows more current data: PM₁ is recorded at 24.5675 µg/m³ (9210 Aalborg SØ, last updated 2026‑02‑10 20:00 UTC), PM₂.₅ at 48.2467 µg/m³ (same station and timestamp), and PM₁₀ at 18.0867 µg/m³ (9210 Aalborg SØ, last updated 2025‑01‑13 23:00 UTC). Relative humidity is reported as 66.8542 % (9210 Aalborg SØ, last updated 2026‑02‑10 20:00 UTC).

Only three of the eight pollutants have timestamps within the past few days, showing that the freshest data are for PM₁, PM₂.₅ and humidity. The remaining five gases either lack a recent timestamp or are marked as “unknown,” meaning their values may not reflect current conditions. Consequently, while particulate matter and humidity give a near‑real‑time picture of air quality at one location, the gas measurements provide a more limited, possibly outdated snapshot across the city. Users should keep in mind that conditions can differ by neighbourhood and time, especially for pollutants with older or missing update information.

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 Aalborg reflects five valid measurements and is updated within three days, with the most recent reading recorded at 2026‑02‑10T20:00:00+00:00. This snapshot provides a current view of air quality across the city, but conditions can differ by specific location and time of day, so values may vary locally.

OpenAQ station rows