What is the air quality trend in Marion?

Over the past 15 days, Marion had an average AQI of 50 based on station measurements. The worst day was 2026-07-16 with AQI 99.

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
Good CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

181h

PM2.5 Station

181h · 1 station

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-21	51	19–129	14.4 µg/m³	11h	1
2026-07-20	44	12–103	12.4 µg/m³	11h	1
2026-07-19	53	23–155	15.3 µg/m³	15h	1
2026-07-18	66	23–169	23.3 µg/m³	10h	1
2026-07-17	92	13–197	46.0 µg/m³	13h	1
2026-07-16	99	25–248	41.6 µg/m³	15h	1
2026-07-15	75	15–154	24.2 µg/m³	13h	1
2026-07-14	46	33–57	11.2 µg/m³	16h	1
2026-07-13	41	22–50	9.9 µg/m³	7h	1
2026-07-12	36	9–69	8.8 µg/m³	13h	1
2026-07-11	46	23–70	11.6 µg/m³	13h	1
2026-07-10	29	11–52	7.1 µg/m³	15h	1
2026-07-09	34	16–47	8.2 µg/m³	16h	1
2026-07-08	31	9–55	7.4 µg/m³	11h	1
2026-07-07	19	10–28	4.6 µg/m³	2h	2

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