Air quality in Clackamas County, Oregon, United States of America today
Mr. Duck’s Air Quality Score
Good air today for Clackamas 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 today in Clackamas County, Oregon is rated Good. The primary pollutant identified is PM2.5 (fine particles). A single valid measurement was recorded, showing a PM2.5 reference value of 2.0 micrograms per cubic meter.
Data are shown via OpenAQ and reflect the current assessment for this location. 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 data for Clackamas County includes measurements of two pollutants: fine particulate matter (PM2.5) and ozone (O3). There are three monitoring rows in total, but they represent only two distinct stations; one station provides both PM2.5 and O3 readings while the other contributes a second PM2.5 record. This means that coverage is limited to just a couple of locations within the county.
The most recent PM2.5 value was recorded on 2026-02-10 23:00 UTC, showing a uniform reading of 2.0 µg/m³ across both rows that report this pollutant. All PM2.5 entries are fresh, having been updated within the past seven days. In contrast, the lone O3 measurement is older, last logged on 2025-10-06 16:00 UTC, and it records a single value of 0.024 ppm. Because only one ozone reading exists and it dates back several months, the ozone data set is sparse and not current.
Across the three rows, the PM2.5 values have no variation—the minimum, median, maximum, 10th percentile and 90th percentile are all identical at 2.0 µg/m³. This lack of spread indicates that the limited stations are reporting a consistent concentration, but it also means there is no insight into spatial differences within the county. The ozone data, with only one point, similarly offers no range or distribution.
Overall, the dataset provides recent and consistent PM2.5 information from two nearby sensors, while ozone coverage is minimal and dated. Users should keep in mind that conditions can differ across Clackamas County, especially given the small number of monitoring locations and the age disparity between the pollutant records.
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 for Clackamas County, Oregon, and was updated within 3 days (last refreshed on 2026‑02‑10 at 23:00 UTC). This snapshot provides a momentary view of air quality; conditions can differ across neighborhoods and change throughout the day, so values may not represent the entire county at any given time.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| Portland - Spangler | o3 | 0.024 | ppm | 2025-10-06 16:00 UTC |
| Portland - Spangler | pm25 | 2.0 | µg/m³ | 2026-02-10 23:00 UTC |
| Multorpor | pm25 | 2.0 | µg/m³ | 2025-10-09 19:00 UTC |