What is the air quality trend in Spokane?

Over the past 18 days, Spokane had an average AQI of 18 based on station measurements. The worst day was with AQI .

How is Spokane air quality measured?

Air quality in Spokane 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 Spokane, United States

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

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

Current AQI
Good

48 Hours 7 Days 14 Days 20 Days

Air Quality Index Trend

360h

PM2.5 Trend

360h · 12 stations

Daily Summary

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-04-12	20	10–30	4.7 µg/m³	17h	13
2026-04-11	24	15–40	5.6 µg/m³	24h	12
2026-04-10	28	8–52	6.7 µg/m³	24h	12
2026-04-09	25	10–37	6.1 µg/m³	16h	11
2026-04-08	7	4–11	1.6 µg/m³	10h	13
2026-04-07	9	5–12	2.2 µg/m³	24h	13
2026-04-06	32	7–53	7.8 µg/m³	18h	12
2026-04-04	23	6–34	5.5 µg/m³	16h	13
2026-04-03	16	3–34	3.8 µg/m³	24h	4
2026-04-02	15	3–52	3.7 µg/m³	24h	11
2026-04-01	22	9–44	5.3 µg/m³	24h	11
2026-03-31	23	3–52	5.5 µg/m³	24h	11
2026-03-30	8	3–18	1.9 µg/m³	12h	10
2026-03-29	15	6–32	3.7 µg/m³	24h	11
2026-03-28	32	8–50	7.7 µg/m³	24h	12
2026-03-27	19	4–33	4.6 µg/m³	24h	13
2026-03-26	4	3–7	1.1 µg/m³	24h	13
2026-03-25	7	3–15	1.7 µg/m³	7h	9

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