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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

MPCA Home  > Air Quality Index  > Marshall Hourly AQI  > Marshall Raw Data

Minnesota Pollution Control Agency
Marshall Hourly Ozone 8 Hour Rolling
March 26, 2012
<< Previous Day Next Day >>
Ozone 8 Hour Rolling
Parts per Million
Sites
Hour4210
0 0.032
1 0.031
2 0.030
3 0.030
4 0.029
5 0.028
6 0.028
7 0.028
8 0.028
9 0.028
10 0.027
11 0.027
12 0.027
13 0.027
14 0.028
15 0.028
16 0.028
17 0.029
18 0.030
19 0.031
20 0.031
21 0.031
22 0.030
23 0.029
Ozone 8 Hour Rolling
AQI
Sites
4210
27
26
25
25
24
23
23
23
23
23
22
22
22
22
23
23
23
24
25
26
26
26
25
24
      

This page was last updated September 8, 2003

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Minnesota Pollution Control Agency, 520 Lafayette Road, St. Paul, MN 55155-4194
Phone: 651-296-6300, 800-657-3864; 24-hour emergency number: 651-649-5451 or 800-422-0798; TTY: 651-282-5332, TTY 24-hour emergency number: 651-297-5353 or 800-627-3529

 

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