What is the air quality trend in Madison?

Over the past 8 days, Madison had an average AQI of 49 based on station measurements. The worst day was 2026-07-16 with AQI 73.

How is Madison air quality measured?

Air quality in Madison 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 Madison, United States

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

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

Current AQI
Moderate Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

124h

PM2.5 Station

124h · 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	46	15–72	12.0 µg/m³	13h	2
2026-07-20	51	26–90	14.2 µg/m³	19h	1
2026-07-19	46	9–152	12.8 µg/m³	20h	1
2026-07-18	36	17–71	9.0 µg/m³	18h	2
2026-07-17	62	10–300	27.7 µg/m³	17h	1
2026-07-16	73	18–237	36.3 µg/m³	19h	1
2026-07-15	36	5–59	8.8 µg/m³	17h	1
2026-07-14	43	43–43	10.4 µg/m³	1h	2

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