Air quality in Madison
The US Air Quality Index (EPA) grades air from 0 to 500 using fine particles (PM2.5/PM10), ozone and nitrogen dioxide. 0-50 is Good, 51-100 Moderate, 101-150 Unhealthy for Sensitive Groups, and anything higher affects everyone.
PM2.5
10 µg/m³
WHO guideline 15
PM10
10.2 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
2:00 AM
💨
PM2.5 10 µg/m³
42Good
3:00 AM
💨
PM2.5 9.7 µg/m³
40Good
4:00 AM
💨
PM2.5 9.3 µg/m³
39Good
5:00 AM
💨
PM2.5 9 µg/m³
38Good
6:00 AM
💨
PM2.5 8.7 µg/m³
36Good
7:00 AM
💨
PM2.5 8.6 µg/m³
36Good
8:00 AM
💨
PM2.5 8.5 µg/m³
35Good
9:00 AM
💨
PM2.5 8.1 µg/m³
40Good
10:00 AM
💨
PM2.5 8.3 µg/m³
48Good
11:00 AM
💨
PM2.5 7.8 µg/m³
50Good
12:00 PM
💨
PM2.5 7.4 µg/m³
51Moderate
1:00 PM
💨
PM2.5 6.8 µg/m³
53Moderate
Next few days
daily max · US EPA AQI
Mon
💨
Moderate · UV Very high
63
Tue
💨
Moderate · UV Very high
99
Wed
💨
Unhealthy for Sensitive Groups · UV Very high
115
Thu
💨
Unhealthy for Sensitive Groups · UV Very high
108
Fri
💨
Good · UV Very high
44