What is the air quality trend in Tualatin?

Over the past 21 days, Tualatin had an average AQI of 45 based on station measurements. The worst day was 2026-08-05 with AQI 123.

How is Tualatin air quality measured?

Air quality in Tualatin 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 Tualatin, United States

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

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

Current AQI
Good CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

478h

PM2.5 Station

478h · 25 stations

Temperature GFS model

80pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-08-08	55	51–59	13.9 µg/m³	5h	23
2026-08-07	75	58–117	23.3 µg/m³	24h	20
2026-08-06	101	70–153	35.0 µg/m³	24h	19
2026-08-05	123	96–162	45.1 µg/m³	24h	18
2026-08-04	99	70–146	34.4 µg/m³	24h	21
2026-08-03	33	12–86	9.0 µg/m³	24h	18
2026-08-02	18	10–40	4.3 µg/m³	24h	20
2026-08-01	27	9–92	7.0 µg/m³	24h	21
2026-07-31	31	13–68	7.7 µg/m³	24h	19
2026-07-30	25	9–77	6.4 µg/m³	24h	18
2026-07-29	26	10–53	6.1 µg/m³	24h	20
2026-07-28	31	14–55	7.6 µg/m³	24h	20
2026-07-27	26	8–61	6.3 µg/m³	24h	20
2026-07-26	22	8–91	5.7 µg/m³	24h	20
2026-07-25	28	12–109	7.6 µg/m³	24h	18
2026-07-24	26	10–67	6.6 µg/m³	24h	18
2026-07-23	42	17–76	10.7 µg/m³	24h	20
2026-07-22	58	38–72	15.9 µg/m³	24h	18
2026-07-21	44	25–71	11.2 µg/m³	24h	16
2026-07-20	29	13–83	7.3 µg/m³	24h	17
2026-07-19	33	12–57	8.0 µg/m³	17h	20

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