What is the air quality trend in Ellensburg?

Over the past 16 days, Ellensburg had an average AQI of 14 based on station measurements. The worst day was with AQI .

How is Ellensburg air quality measured?

Air quality in Ellensburg 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 Ellensburg, United States

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

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

Current AQI
Good

48 Hours 7 Days 14 Days 20 Days

PM2.5 Trend

317h · 7 stations

Daily Summary

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-04-10	21	12–41	4.9 µg/m³	3.5	21h	9
2026-04-09	29	8–73	7.9 µg/m³	4.2	17h	7
2026-04-08	10	7–13	2.5 µg/m³	1.9	10h	10
2026-04-07	9	6–12	2.1 µg/m³	0.9	24h	9
2026-04-06	16	8–31	3.8 µg/m³	1.4	18h	8
2026-04-04	11	6–14	2.6 µg/m³	3.8	16h	9
2026-04-03	13	2–21	3.2 µg/m³	0.9	24h	3
2026-04-02	12	2–28	2.9 µg/m³	1.5	24h	8
2026-04-01	27	9–79	6.9 µg/m³	3.3	24h	8
2026-03-31	19	2–53	4.5 µg/m³	0.7	24h	8
2026-03-30	5	1–15	1.2 µg/m³	—	12h	8
2026-03-29	10	5–20	2.3 µg/m³	1.4	24h	8
2026-03-28	18	8–23	4.3 µg/m³	2.0	24h	9
2026-03-27	13	4–23	3.1 µg/m³	4.0	24h	10
2026-03-26	6	3–12	1.5 µg/m³	11.1	24h	8
2026-03-25	10	5–27	2.4 µg/m³	0.4	7h	7

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