What is the air quality trend in Marion?

Over the past 7 days, Marion had an average AQI of 74 based on station measurements. The worst day was 2026-07-17 with AQI 132.

How is Marion air quality measured?

Air quality in Marion 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 Marion, United States

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

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

Current AQI
Moderate Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

120h

PM2.5 Station

120h · 2 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-21	58	18–89	16.4 µg/m³	17h	2
2026-07-20	60	16–149	18.2 µg/m³	19h	1
2026-07-19	52	10–171	16.5 µg/m³	17h	2
2026-07-18	91	10–160	33.4 µg/m³	16h	2
2026-07-17	132	2–322	85.9 µg/m³	19h	1
2026-07-16	79	10–399	45.8 µg/m³	16h	2
2026-07-15	46	10–79	12.1 µg/m³	16h	2

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