What is the air quality trend in Ottumwa?

Over the past 7 days, Ottumwa had an average AQI of 56 based on station measurements. The worst day was 2026-07-19 with AQI 79.

How is Ottumwa air quality measured?

Air quality in Ottumwa 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 Ottumwa, United States

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

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

Current AQI
Good CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

55h

PM2.5 Station

55h · 1 station

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-21	56	35–89	15.5 µg/m³	10h	1
2026-07-20	51	4–135	15.3 µg/m³	10h	1
2026-07-19	79	28–175	31.0 µg/m³	9h	1
2026-07-18	70	17–185	31.4 µg/m³	9h	1
2026-07-17	52	52–52	12.5 µg/m³	1h	2
2026-07-16	39	20–55	9.4 µg/m³	7h	1
2026-07-15	49	30–72	13.0 µg/m³	9h	1

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