What is the air quality trend in Coos Bay?

Over the past 8 days, Coos Bay had an average AQI of 39 based on station measurements. The worst day was 2026-08-04 with AQI 84.

How is Coos Bay air quality measured?

Air quality in Coos Bay 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 Coos Bay, United States

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

Historical PM2.5 and AQI trend from monitoring stations near Coos Bay, United States.

Current AQI
Good CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

111h

PM2.5 Station

111h · 1 station

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-08-08	37	37–37	8.8 µg/m³	1h	1
2026-08-07	20	14–35	4.8 µg/m³	20h	1
2026-08-06	29	14–44	6.9 µg/m³	23h	1
2026-08-05	49	23–64	12.7 µg/m³	21h	1
2026-08-04	84	25–394	42.5 µg/m³	16h	1
2026-08-03	78	8–394	64.2 µg/m³	6h	1
2026-08-02	10	9–10	2.3 µg/m³	5h	1
2026-08-01	7	5–9	1.6 µg/m³	19h	1

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