Minnesota Pollution Control Agency Logo  Minnesota Pollution Control Agency
 
  Home   |  Site Index   |  Glossary  |  What's New  |  Ask MPCA   |   Visitor Center  

Air Quality Index

AQI Locations:

Rochester
Brainerd
Duluth
Ely
St Cloud
Twin Cities
Marshall
Detroit Lakes


Sign up for air quality alerts and forecasts


Call the AQI Hotline for daily air quality forecasts for the Twin Cities and Rochester at 651-297-1630 (metro) or 1-800-657-3694.

PDF DocumentAQI Site Help

About the AQI

Pollutant description

Health effects

Cautionary Statements

Breakpoints

Map of Air Quality Stations

Color Legend:
Good 0-50
Moderate 51-100
Unhealthy for Sensitive Groups 101-150
Unhealthy 151-200
Very Unhealthy 201-300
Minnesota Pollution Control Agency
Marshall Hourly AQI

May 04 2012
<< Previous Day Next Day >>
Hour
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
Carbon Monoxide
Ozone
3
2
0
0
5
14
15
21
25
30
34
32
26
27
32
31
35
35
35
29
26
23
21
21
Ozone 8hr
28
22
16
11
8
6
6
9
11
16
20
24
27
28
31
32
33
34
34
33
33
33
32
30
PM 2.5
32
32
32
29
29
29
29
25
25
29
25
25
25
25
25
25
25
25
25
25
25
25
25
25
Sulfur Dioxide
AQI Max
32
32
32
29
29
29
29
25
25
30
34
32
27
28
32
32
35
35
35
33
33
33
32
30
* Data is not quality assured at this time.
** Ozone levels, which are only elevated in warm weather, are measured from April 1st through September 30th in Minnesota and are not collected outside of that period.
The AQI is updated hourly between 6:00 a.m. and Midnight
      

 

web2