Air quality in Aarhus, Central Denmark Region, Denmark today

Mr. Duck’s Air Quality Score

Unhealthy for sensitive groups for Aarhus, Central 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 Aarhus today falls into the USG category according to OpenAQ data. The main pollutant identified is PM2.5 (fine particles). Measurements show a PM2.5 concentration of 47.34 µg/m³ based on five valid readings.

These values reflect the current monitoring results for the city. 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

Aarhus air‑quality data currently cover three monitoring sites and a total of thirteen recorded rows. The dataset includes measurements for carbon monoxide (CO), nitrogen oxide (NO), nitrogen dioxide (NO2), ozone (O3), particulate matter of 1 µm (PM1), 2.5 µm (PM2.5) and 10 µm (PM10), as well as relative humidity. Freshness varies widely: the most recent values are from early February 2026 for PM1, PM2.5 and relative humidity at the Risskov site (2026‑02‑10 20:00 UTC). The only other timestamp in the set is an older entry for PM10 recorded on 2025‑01‑13 23:00 UTC, also at Risskov. All other pollutants—CO, O3, NO and NO2—show no update information, meaning their last‑known values are unknown.

The available numbers illustrate a modest range across the city. For NO the measured concentrations span from about 16.7 µg/m³ up to 71.6 µg/m³, with a median near 44.1 µg/m³; NO2 ranges from roughly 21.6 µg/m³ to 171.7 µg/m³, median around 96.7 µg/m³. PM10 values are low, between 6.18 µg/m³ and 12.8 µg/m³, with a median of 9.49 µg/m³, while the single recent readings for PM1 (24.6 µg/m³) and PM2.5 (47.34 µg/m³) reflect higher particulate loads at the same location. Relative humidity is recorded as a constant 57.87 % in the latest entry.

Overall, most of the data are either old or lack timestamp information, so the picture they provide is limited to specific moments and locations rather than continuous city‑wide coverage. Users should keep in mind that conditions can differ across neighborhoods and over time, especially given the sparse and unevenly refreshed dataset.

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 Aarhus reflects five valid measurements and was updated within three days, with the latest refresh recorded at 2026‑02‑10 20:00 UTC. This snapshot provides a recent view of citywide air quality but does not capture variations that can occur across different neighborhoods or times of day, so conditions may differ locally from what is displayed here.

OpenAQ station rows