Air quality in Columbia County, Oregon, United States of America today
Mr. Duck’s Air Quality Score
Good air today for Columbia County, Oregon, 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 Columbia County, Oregon is classified as Good today. The primary pollutant identified is PM2.5 (fine particles).
A single valid measurement recorded a PM2.5 concentration of 2.7 µg/m³. No PM10 value is available 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 Columbia County includes two measured pollutants: ozone (O3) and fine particulate matter (PM2.5). Both are reported from a single monitoring location, identified as Portland – Sauvie Is, so the station count is one row per pollutant.
The ozone reading is 0.006 ppm, recorded at 2025‑10‑07 16:00 UTC and flagged as old data. In contrast, the PM2.5 measurement is 2.7 µg/m³, captured more recently on 2026‑02‑10 23:00 UTC and classified as updated within the past seven days. This means that while the particulate matter value reflects conditions from just a few days ago, the ozone figure represents a snapshot from over a year earlier.
Both pollutants show no variation across the available records: the minimum, median, maximum, 10th percentile and 90th percentile are identical for each—0.006 ppm for O3 and 2.7 µg/m³ for PM2.5. Consequently, there is no observed spread or range in the data; each pollutant has a single reported value.
Coverage across pollutants is uneven: the dataset provides a recent entry only for PM2.5, whereas ozone lacks any fresh observations. Because the information comes from just one site, it does not capture spatial differences that may exist elsewhere in Columbia County, and the age of the ozone data limits its relevance to current conditions. Users should keep in mind that air quality can change over time and location, and the present dataset offers a very limited view.
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 a single valid measurement and was updated within 3 days, with the most recent reading recorded on 2026‑02‑10 at 23:00 UTC. This snapshot provides a brief view of current conditions; however, air quality can differ across neighborhoods and change throughout the day, so local variations may not be captured in this single data point.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| Portland - Sauvie Is | o3 | 0.006 | ppm | 2025-10-07 16:00 UTC |
| Portland - Sauvie Is | pm25 | 2.7 | µg/m³ | 2026-02-10 23:00 UTC |