What is the air quality trend in Des Moines?

Over the past 21 days, Des Moines had an average AQI of 21 based on station measurements. The worst day was 2026-10-04 with AQI 35.

How is Des Moines air quality measured?

Air quality in Des Moines 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 Des Moines, United States

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

477h

PM2.5 Station

477h · 18 stations

Temperature GFS model

80pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-10-21	18	17–18	2.8 µg/m³	3h	12
2026-10-20	29	3–74	4.9 µg/m³	24h	8
2026-10-19	14	5–30	3.2 µg/m³	24h	9
2026-10-18	10	5–17	2.2 µg/m³	24h	13
2026-10-17	9	2–20	0.9 µg/m³	24h	5
2026-10-16	32	1–132	6.2 µg/m³	21h	5
2026-10-15	29	1–65	7.1 µg/m³	24h	12
2026-10-14	5	1–24	1.2 µg/m³	24h	7
2026-10-13	32	1–139	7.4 µg/m³	24h	4
2026-10-12	15	6–29	2.4 µg/m³	24h	13
2026-10-11	12	6–26	2.7 µg/m³	24h	17
2026-10-10	11	3–16	1.3 µg/m³	24h	6
2026-10-09	18	2–39	2.0 µg/m³	24h	8
2026-10-08	23	1–72	3.4 µg/m³	24h	2
2026-10-07	24	1–58	5.9 µg/m³	24h	11
2026-10-06	23	1–62	4.6 µg/m³	24h	6
2026-10-05	26	2–62	3.8 µg/m³	24h	6
2026-10-04	35	3–55	5.6 µg/m³	24h	10
2026-10-03	26	3–53	5.1 µg/m³	24h	11
2026-10-02	26	6–38	6.2 µg/m³	24h	17
2026-10-01	33	16–44	7.9 µg/m³	21h	17

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