What is the air quality trend in The Dalles?

Over the past 15 days, The Dalles had an average AQI of 18 based on station measurements. The worst day was 2026-07-22 with AQI 57.

How is The Dalles air quality measured?

Air quality in The Dalles 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 The Dalles, United States

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

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

Current AQI
Moderate Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

308h

PM2.5 Station

308h · 1 station

Temperature GFS model

55pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-22	57	57–57	15.1 µg/m³	1h	1
2026-07-21	52	25–84	14.5 µg/m³	22h	1
2026-07-20	21	15–25	5.0 µg/m³	24h	1
2026-07-19	19	15–23	4.4 µg/m³	24h	1
2026-07-18	16	8–24	3.8 µg/m³	24h	1
2026-07-17	21	7–30	5.0 µg/m³	24h	1
2026-07-16	24	18–30	5.9 µg/m³	20h	1
2026-07-15	15	7–25	3.5 µg/m³	24h	1
2026-07-14	8	5–11	1.8 µg/m³	24h	1
2026-07-13	5	3–7	1.1 µg/m³	24h	1
2026-07-12	4	2–6	1.0 µg/m³	24h	1
2026-07-11	7	3–12	1.6 µg/m³	24h	1
2026-07-10	11	6–17	2.7 µg/m³	24h	1
2026-07-09	9	5–11	2.1 µg/m³	14h	1
2026-07-08	8	5–17	2.0 µg/m³	11h	1

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