What is the air quality trend in Sun Prairie?

Over the past 8 days, Sun Prairie had an average AQI of 105 based on station measurements. The worst day was 2026-07-17 with AQI 202.

How is Sun Prairie air quality measured?

Air quality in Sun Prairie 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 Sun Prairie, United States

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

40h

PM2.5 Station

40h · 2 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-22	35	31–43	8.5 µg/m³	3h	2
2026-07-21	37	29–56	9.1 µg/m³	4h	1
2026-07-20	108	73–128	38.1 µg/m³	6h	2
2026-07-19	187	159–218	121.4 µg/m³	4h	2
2026-07-18	60	27–91	17.8 µg/m³	8h	2
2026-07-17	202	169–253	140.1 µg/m³	4h	2
2026-07-16	174	172–178	100.6 µg/m³	4h	2
2026-07-15	39	30–44	9.3 µg/m³	7h	2

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