What is the air quality trend in Tigard?

Over the past 8 days, Tigard had an average AQI of 64 based on station measurements. The worst day was 2026-08-05 with AQI 152.

How is Tigard air quality measured?

Air quality in Tigard 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 Tigard, United States

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

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

Current AQI
Moderate Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

158h

PM2.5 Station

158h · 3 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-08-08	49	42–60	12.3 µg/m³	5h	3
2026-08-07	54	41–116	13.9 µg/m³	20h	3
2026-08-06	112	75–156	41.2 µg/m³	24h	3
2026-08-05	152	140–158	59.7 µg/m³	24h	3
2026-08-04	107	78–156	38.0 µg/m³	24h	3
2026-08-03	27	9–79	7.3 µg/m³	18h	3
2026-08-02	13	3–21	3.0 µg/m³	24h	3
2026-08-01	4	2–9	1.0 µg/m³	19h	2

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