What is the air quality trend in Oregon City?

Over the past 15 days, Oregon City had an average AQI of 21 based on station measurements. The worst day was 2026-09-01 with AQI 44.

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

333h

PM2.5 Station

333h · 22 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	14–25	4.3 µg/m³	16h	23
2026-09-04	16	11–23	3.8 µg/m³	24h	21
2026-09-03	15	11–18	3.7 µg/m³	24h	23
2026-09-02	15	11–22	3.7 µg/m³	24h	14
2026-09-01	44	19–110	12.7 µg/m³	24h	17
2026-08-31	33	14–61	8.0 µg/m³	24h	22
2026-08-30	17	14–25	4.2 µg/m³	24h	21
2026-08-29	17	12–26	4.0 µg/m³	24h	22
2026-08-28	18	8–36	4.4 µg/m³	24h	22
2026-08-27	18	9–35	4.3 µg/m³	24h	21
2026-08-26	21	11–43	5.1 µg/m³	24h	22
2026-08-25	38	15–48	9.1 µg/m³	24h	23
2026-08-24	24	12–46	5.8 µg/m³	24h	21
2026-08-23	13	10–18	3.2 µg/m³	24h	21
2026-08-22	17	14–25	4.1 µg/m³	5h	23

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