Air quality in Aspen, Colorado, United States of America today
Mr. Duck’s Air Quality Score
Good air today for Aspen, Colorado, United States of America
This friendly indicator summarizes the latest city readings. For health guidance, please see: EPA AirNow or WHO.
Air quality today
The air quality in Aspen, Colorado is classified as Good today. The primary pollutant identified is PM2.5 (fine particles).
Measurements show a PM2.5 reference value of 3.0 µg/m³ and a PM10 reference value of 29.0 µg/m³ based on two valid observations reported through OpenAQ. 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 current station data listed for this city is focused on particulate matter (PM). Aspen’s OpenAQ feed includes two measured pollutants: PM10 and PM2.5, each reported from a single monitoring location at the Yellow Brick Buildin. Both metrics were last updated on 2026-02-11 00:00 UTC, which falls within the “updated within 7 days” freshness window, so the data are relatively recent.
Because only one station contributes rows for each pollutant, the dataset shows a single value rather than a range: PM10 registers at 29.0 µg/m³ and PM2.5 at 3.0 µg/m³, with those figures also representing the minimum, median and maximum for their respective series. The uniformity of the numbers reflects the limited spatial coverage; conditions elsewhere in Aspen may differ from what this lone sensor records. Nonetheless, the timestamps confirm that the available readings are up‑to‑date, even though broader station density would be needed to capture a fuller picture of particulate levels across the city.
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 reflects two valid measurements and was Updated today, with the most recent reading recorded at 2026‑02‑11T00:00:00+00:00. These values represent a brief snapshot of Aspen’s air quality; conditions can differ across neighborhoods and change throughout the day, so this information may not capture all local variations.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| Yellow Brick Buildin | pm10 | 29.0 | µg/m³ | 2026-02-11 00:00 UTC |
| Yellow Brick Buildin | pm25 | 3.0 | µg/m³ | 2026-02-11 00:00 UTC |