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Air Quality Index

AQI Locations:

Rochester
Brainerd
Duluth
Ely
St Cloud
Twin Cities
Marshall
Detroit Lakes

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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
March 26, 2012
<< Previous Day Next Day >>
Ozone
Parts per Million
Sites
Hour4210
0 0.030
1 0.028
2 0.027
3 0.028
4 0.026
5 0.026
6 0.028
7 0.029
8 0.030
9 0.028
10 0.024
11 0.023
12 0.025
13 0.031
14 0.032
15 0.033
16 0.031
17 0.034
18 0.032
19 0.030
20 0.028
21 0.026
22 0.026
23 0.027
Ozone
AQI
Sites
4210
23
21
21
21
20
20
21
22
23
21
18
17
19
24
25
25
24
26
25
23
21
20
20
21
      

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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