What is the air quality trend in Coos Bay?

Over the past 15 days, Coos Bay had an average AQI of 131 based on station measurements. The worst day was 2026-05-30 with AQI 439.

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 Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

311h

PM2.5 Station

311h · 1 station

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-06-09	8	5–9	1.8 µg/m³	11h	1
2026-06-08	7	5–12	1.7 µg/m³	23h	1
2026-06-07	10	5–26	2.5 µg/m³	23h	1
2026-06-06	11	5–22	2.5 µg/m³	23h	1
2026-06-05	11	6–23	2.5 µg/m³	23h	1
2026-06-04	14	8–25	3.4 µg/m³	23h	1
2026-06-03	11	6–15	2.8 µg/m³	24h	1
2026-06-02	40	10–489	27.1 µg/m³	21h	1
2026-06-01	165	11–489	156.2 µg/m³	19h	1
2026-05-31	366	6–489	358.0 µg/m³	23h	1
2026-05-30	439	13–489	434.7 µg/m³	22h	1
2026-05-29	92	5–489	84.4 µg/m³	22h	1
2026-05-28	82	17–489	65.8 µg/m³	24h	1
2026-05-27	343	12–489	337.3 µg/m³	20h	1
2026-05-26	379	8–489	372.0 µg/m³	10h	1

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