What is the air quality trend in Lake Oswego?

Over the past 15 days, Lake Oswego had an average AQI of 39 based on station measurements. The worst day was 2026-08-05 with AQI 152.

How is Lake Oswego air quality measured?

Air quality in Lake Oswego 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 Lake Oswego, United States

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

Historical PM2.5 and AQI trend from monitoring stations near Lake Oswego, United States.

Current AQI
Moderate Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

325h

PM2.5 Station

325h · 3 stations

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-08-08	50	41–60	12.5 µg/m³	10h	3
2026-08-07	54	41–118	13.9 µg/m³	20h	3
2026-08-06	113	76–156	41.5 µg/m³	24h	3
2026-08-05	152	140–158	59.9 µg/m³	24h	3
2026-08-04	107	77–156	38.2 µg/m³	24h	3
2026-08-03	27	9–79	7.3 µg/m³	18h	3
2026-08-02	13	3–21	3.0 µg/m³	24h	3
2026-08-01	4	2–8	1.1 µg/m³	24h	2
2026-07-31	18	9–40	4.3 µg/m³	24h	3
2026-07-30	13	4–29	3.2 µg/m³	23h	3
2026-07-29	10	2–20	2.5 µg/m³	24h	2
2026-07-28	9	4–15	2.1 µg/m³	24h	2
2026-07-27	8	3–13	1.9 µg/m³	24h	3
2026-07-26	6	2–13	1.5 µg/m³	24h	3
2026-07-25	13	8–16	3.0 µg/m³	14h	3

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