What is the air quality trend in Tri-Cities?

Over the past 8 days, Tri-Cities had an average AQI of 92 based on station measurements. The worst day was 2026-08-05 with AQI 152.

How is Tri-Cities air quality measured?

Air quality in Tri-Cities 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 Tri-Cities, United States

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

Historical PM2.5 and AQI trend from monitoring stations near Tri-Cities, 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 · 4 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-08-08	72	50–110	21.9 µg/m³	9h	4
2026-08-07	118	63–142	42.1 µg/m³	20h	4
2026-08-06	151	126–159	59.6 µg/m³	24h	4
2026-08-05	152	124–163	63.3 µg/m³	24h	4
2026-08-04	145	98–176	64.4 µg/m³	24h	4
2026-08-03	44	5–97	13.3 µg/m³	18h	4
2026-08-02	31	4–386	18.5 µg/m³	24h	4
2026-08-01	29	6–74	7.8 µg/m³	15h	3

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