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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
June 26, 2012
<< Previous Day Next Day >>
Ozone 8 Hour Rolling
Parts per Million
Sites
Hour4210
0 0.040
1 0.037
2 0.034
3 0.032
4 0.030
5 0.029
6 0.030
7 0.031
8 0.034
9 0.037
10 0.040
11 0.043
12 0.046
13 0.050
14 0.052
15 0.054
16 0.056
17 0.057
18 0.058
19 0.058
20 0.058
21 0.057
22 0.057
23 0.056
Ozone 8 Hour Rolling
AQI
Sites
4210
33
31
28
27
25
24
25
26
28
31
33
36
38
42
44
45
47
48
49
49
49
48
48
47
      

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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