What is the air quality trend in Richland?

Over the past 8 days, Richland had an average AQI of 90 based on station measurements. The worst day was 2026-08-05 with AQI 153.

How is Richland air quality measured?

Air quality in Richland 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 Richland, United States

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

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

Current AQI
Moderate Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

157h

PM2.5 Station

157h · 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	56	52–62	14.2 µg/m³	5h	4
2026-08-07	119	58–145	42.4 µg/m³	20h	4
2026-08-06	152	126–159	61.0 µg/m³	24h	4
2026-08-05	153	125–163	64.2 µg/m³	24h	4
2026-08-04	144	97–174	65.2 µg/m³	24h	4
2026-08-03	41	5–98	12.6 µg/m³	18h	4
2026-08-02	23	4–255	11.5 µg/m³	24h	4
2026-08-01	33	6–74	9.0 µg/m³	18h	3

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