What is the air quality trend in Oregon City?

Over the past 15 days, Oregon City had an average AQI of 23 based on station measurements. The worst day was 2026-09-01 with AQI 48.

How is Oregon City air quality measured?

Air quality in Oregon City is measured by ground-level monitoring stations that report PM2.5 and PM10 concentrations hourly. CERNS.IO aggregates readings from nearby stations and converts PM2.5 to the US EPA Air Quality Index (AQI) scale.

Air Quality History for Oregon City, United States

Name: Oregon City Air Quality History
Creator: CERNS.IO
License: https://creativecommons.org/licenses/by/4.0/

Historical PM2.5 and AQI trend from monitoring stations near Oregon City, United States.

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

334h

PM2.5 Station

334h · 6 stations

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-09-05	18	12–22	4.3 µg/m³	21h	24
2026-09-04	16	12–22	3.8 µg/m³	24h	23
2026-09-03	16	12–19	3.7 µg/m³	24h	24
2026-09-02	16	12–21	3.9 µg/m³	24h	16
2026-09-01	48	19–112	14.0 µg/m³	24h	18
2026-08-31	35	17–68	8.9 µg/m³	24h	24
2026-08-30	18	13–27	4.2 µg/m³	24h	23
2026-08-29	19	13–35	4.5 µg/m³	24h	23
2026-08-28	19	10–33	4.6 µg/m³	24h	24
2026-08-27	24	15–47	5.9 µg/m³	24h	23
2026-08-26	24	11–40	5.6 µg/m³	24h	24
2026-08-25	38	19–48	9.1 µg/m³	24h	25
2026-08-24	26	12–44	6.3 µg/m³	24h	23
2026-08-23	14	9–24	3.3 µg/m³	24h	23
2026-08-22	19	19–19	4.6 µg/m³	1h	25

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