Table 2 

24-Hour and Annual PM2.5 Monitoring Data and 

Design Values 

For 

North Dakota and Neighboring States 

(Iowa, Minnesota and South Dakota) 

1999 - 2008 

Note 

Monitored values for the PM2.5 98th percentile (24-hour) and the weighted arithmetic mean (annual) are 

from an Air Quality System (AQS) Quick Look report results for the 1999-2008 time frame. Design values 

were computed by averaging 3-year 98th percentiles for 24-hour PM2.5 and weighted arithmetic means for 

annual PM2.5. For states with many monitoring sites, the data for the few monitors that were active for only 

one or two years, or for a few years at the beginning of the 1999-2008 time span, were not included in this 

table. For states with few monitors, data for monitors active for one or two years were included to provide 

an indication of potential PM2.5 concentrations. 
County Site ID Year 24-Hour 

98th 

Percentile

24-Hour 

Design 

Values

Weighted Arith 

Means

Annual 

Design 

Values

Billings 38-007-0002 2001 10.9 4.67

2002 9.2 4.23

2003 20 13 5.21 4.7

2004 8.9 13 4.42 4.6

2005 10.6 13 4.34 4.7

2006 17.8 12 4.76 4.5

2007 12.5 14 4.96 4.7

2008 10.8 14 4.56 4.8

Burke 38-013-0002 2000 11.8 5.85 `

2001 13.9 5.6

2002 16.4 14 5.43 5.6

2003 18 16 6.62 5.9

2004 19.1 18 5.72 5.9

2005 12 16 5.36 5.9

38-013-0003; 1 2000 12.7 5.88

2001 13.6 9 5.46 3.8

2002 17.6 15 5.32 5.6

2003 18.5 17 6.36 5.7

2004 20 19 6.18 6

2005 11.7 17 4.91 5.8

38-013-0003; 2 2000 12 5.73

2001 13.6 5.37

2002 16.3 14 5.48 5.5

2003 15.7 15 6.18 5.7

2004 18.7 17 6.5 6.1

2005 13.6 16 5.91 6.2

Burleigh 38-015-0003; 1 1999 23 7.61

2000 14.3 6.62

2001 17.1 18 6.68 7

2002 15.5 16 6.38 6.6

2003 16 16 7.24 6.8

2004 17.9 16 6.17 6.6

2005 16.9 17 6.54 6.7

2006 21.3 19 6.79 6.5

2007 13.5 17 6.82 6.7

2008 14.4 16 6.95 6.9

38-015-0003; 2 2006 24.7 6.31

2007 16.9 7.33

2008 14.5 19 6.62 6.8

Cass 38-017-1004; 1 1999 26.7 9.39

2000 26.4 7.71

2001 23.9 26 8.43 8.5

2002 21 24 7.35 7.8

2003 18.4 21 7.89 7.9

2004 26 22 7.52 7.6

North Dakota PM2.5 24-Hour and Annual Design Values: 1999-2008

Page 1 of 2
County Site ID Year 24-Hour 

98th 

Percentile

24-Hour 

Design 

Values

Weighted Arith 

Means

Annual 

Design 

Values

North Dakota PM2.5 24-Hour and Annual Design Values: 1999-2008

Cass 38-017-1004; 1 2005 22.6 22 7.58 7.7

2006 18.9 23 8.16 7.8

2007 15 19 7.5 7.7

2008 23.5 19 8.33 8

McKenzie 38-053-0002 2002 12.8 5.26

2003 11.7 5.67

2004 8.8 11 4.88 5.3

2005 12.3 11 4.74 5.1

2006 17.9 13 5.16 4.9

Mercer 38-057-0004 1999 20.9 6.91

2000 11.5 6.12

2001 16.1 16 5.86 6.3

2002 15.5 14 5.93 6

2003 24.5 19 7.24 6.3

2004 10.8 17 5.63 6.3

2005 18.5 18 5.58 6.2

2006 18.9 16 6.26 5.8

2007 13.5 17 6.63 6.2

2008 13.2 15 6.56 6.5

Steele 38-091-0001 1999 21.3 7.69

2000 21 6.82

2001 14.1 19 6.27 6.9

Page 2 of 2
County Site ID Year 24-Hour 

98th 

Percentile

24-Hour 

Design 

Values

Weighted 

Arith Means

Annual 

Design 

Values

Black Hawk 19-013-0008 1999 30.3 12.05

2000 28.7 11.37

2001 30.2 30 11.8 11.7

2002 24.1 28 10.95 11.4

2003 29.1 28 11.27 11.3

2004 31.8 28 10.11 10.8

2005 35.1 32 12.22 11.2

2006 23.8 30 9.93 10.8

2007 31.5 30 12.44 11.5

2008 28.5 28 10.4 10.9

Cerro Gordo 19-033-0019 1999 26.7 10.04

2000 28.4 10.4

2001 30.8 29 11.22 10.6

2002 24.7 28 9.65 10.4

2003 28.7 28 11.16 10.7

2004 29 27 10.19 10.3

Clinton 19-045-0019 2006 35.5 15.36

2007 36.6 14.47

2008 31 34 12.32 14.1

19-045-0021 1999 33.2 12.82

2000 29.1 11.99

2001 33.4 32 12.51 12.4

2002 29.4 31 11.8 12.1

2003 33.5 32 12.44 12.3

2004 34.5 32 11.32 11.9

2005 39.7 36 13.89 12.6

2006 27.2 34 11.94 12.4

2007 29.6 32 12.07 12.6

2008 28.3 28 11.02 11.7

Johnson 19-103-2001 1999 32.4 12.32

2000 28.4 10.93

2001 34.5 32 11.67 11.6

2002 25.6 30 11.38 11.3

2003 27.3 29 11.77 11.6

2004 37.4 30 11 11.4

2005 41 35 13.61 12.1

2006 27.1 35 11.02 11.9

2007 32.8 34 12.15 12.3

2008 28.3 29 10.69 11.3

Lee 19-111-0008 2007 29.6 12.7

2008 23.8 11.43

Linn 19-113-0037 1999 31.7 11.59

2000 28.3 10.76

2001 33.7 31 11.69 11.3

2002 29.7 31 10.96 11.1

2003 34.7 33 10.97 11.2

2004 29.9 31 10.1 10.7

Iowa PM2.5 24-Hour and Annual Design Values: 1999-2008

Page 1 of 4
County Site ID Year 24-Hour 

98th 

Percentile

24-Hour 

Design 

Values

Weighted 

Arith Means

Annual 

Design 

Values

Iowa PM2.5 24-Hour and Annual Design Values: 1999-2008

Linn 19-113-0037 2005 35.4 33 11.78 11

2006 24.4 30 9.74 10.5

2007 25.9 29 11.13 10.9

2008 25.4 25 10.29 10.4

Montgomery 19-137-0002 2002 20.9 9.98

2003 23.8 9.56

2004 24.5 23 8.74 9.4

2005 33 27 11.1 9.8

2006 25.5 28 9.92 9.9

2007 24.7 28 9.98 10.3

2008 18.8 23 8.72 9.5

Muscatine 19-139-0015 2000 35.2 11.84

2001 40.4 13.16

2002 27.9 35 12.74 12.6

2003 37.9 35 13.2 13

2004 38.4 35 11.82 12.6

2005 36.8 38 13.92 13

2006 27.6 34 11.74 12.5

2007 44 36 14.23 13.3

2008 33.7 35 12.61 12.9

Palo Alto 19-147-1002 2005 27.7 10.15

2006 24.5 9.12

2007 25 26 9.33 9.5

2008 21.3 24 8.64 9

Polk 19-153-0030 2002 25.1 10.58

2003 28 10.47

2004 24.7 26 9.86 10.3

2005 34.4 29 11.31 10.5

2006 23.6 28 9.32 10.2

2007 27.9 29 11.01 10.5

2008 24.2 25 9.79 10

19-153-2510 1999 29.6 11.09

2000 27.3 9.89

2001 27.9 28 10.27 10.4

2002 23.9 26 10.32 10.2

2003 30.5 27 10.74 10.4

2004 29.1 28 9.2 10.1

2005 28.9 30 10.51 10.2

2006 22.4 27 9.23 9.6

2007 25.2 26 10.46 10.1

2008 22.6 23 9.54 9.7

19-153-2520 1999 28.3 11.39

2000 27.2 10.56

2001 28.4 28 10.61 10.9

2002 26.4 27 10.55 10.6

2003 29.3 28 10.72 10.6

2004 32.6 29 9.88 10.4

Page 2 of 4
County Site ID Year 24-Hour 

98th 

Percentile

24-Hour 

Design 

Values

Weighted 

Arith Means

Annual 

Design 

Values

Iowa PM2.5 24-Hour and Annual Design Values: 1999-2008

Polk 19-153-2520 2005 32.5 31 11.35 10.7

Pottawattamie 19-155-0009 1999 23.4 11.34

2000 27.3 9.85

2001 24.7 25 10.48 10.6

2002 23.7 25 10.55 10.3

2003 25.2 25 11 10.7

2004 31.5 27 9.39 10.3

2005 30 29 12.46 11

2006 23.1 28 10.92 10.9

2007 33 29 11.2 11.5

2008 20.2 25 10.26 10.8

Scott 19-163-0015 1999 29.7 13.14

2000 30.3 12.75

2001 33 31 13.21 13

2002 29.5 31 12.25 12.7

2003 32.4 32 12.07 12.5

2004 27.2 30 10.93 11.8

2005 36.7 32 12.99 12

2006 25.9 30 10.67 11.5

2007 30.4 31 12.55 12.1

2008 28.2 28 11.67 11.6

19-163-0018 1999 29.3 12.11

2000 29.2 11.99

2001 32.8 30 12.56 12.2

2002 27 30 12 12.2

2003 30.9 30 12.04 12.2

2004 32.2 30 10.51 11.5

2005 36.8 33 12.89 11.8

2006 26.3 32 10.28 11.2

2007 32.8 32 12.52 11.9

2008 27.5 29 11.22 11.3

19-163-0019 2005 41.2 15.21

2006 32.7 12.99

2007 37.4 37 15.07 14.4

2008 31.3 34 13.49 13.9

Van Buren 19-177-0005 2000 29.5 9.97

2001 30.2 10.62

2002 24 28 10.32 10.3

2003 28.8 28 10.89 10.6

2004 25.5 26 9.01 10.1

19-177-0006 2004 33.6 11.17

2005 32.9 11.79

2006 25.7 31 9.93 11

2007 26.5 28 10.82 10.8

2008 25.7 26 9.36 10

Woodbury 19-193-0017 1999 24.9 9.91

Page 3 of 4
County Site ID Year 24-Hour 

98th 

Percentile

24-Hour 

Design 

Values

Weighted 

Arith Means

Annual 

Design 

Values

Iowa PM2.5 24-Hour and Annual Design Values: 1999-2008

Woodbury 19-193-0017 2000 31.4 9.54

2001 24.5 27 10.55 10

2002 24.7 27 9.63 9.9

2003 29 26 10.84 10.3

2004 21.9 25 9.45 10

2005 25.2 25 10.62 10.3

2006 29 25 10.33 10.1

2007 31.2 28 10.64 10.5

2008 24.7 28 9.84 10.3

Wright 19-197-0004 2003 27.3 10.59

2004 32.5 9.87

2005 26.7 29 11.07 10.5

2006 26.2 28 9.67 10.2

2007 33.3 29 10.5 10.4

2008 27.2 29 9.22 9.8

Page 4 of 4
County Site ID Year 24-Hour 

98th 

Percentile

24-Hour 

Design 

Values

Weighted Arith 

Means

Annual 

Design 

Values

Dakota 27-037-0470 2001 28.1 10.04

2002 23.2 9.82

2003 22.6 25 9.35 9.7

2004 26.2 24 8.15 9.1

2005 27.6 25 10.32 9.3

2006 23.1 26 8.78 9.1

2007 24.8 25 9.57 9.6

2008 22.1 23 9.46 9.3

27-037-6018 2000 42.4 12.31

2001 25.4 23 10.6 7.6

2002 24.7 31 9.71 10.9

2003 23.7 25 9.01 9.8

Hennepin 27-053-0961 2000 37.6 12.22

2001 27.7 11.24

2002 25.4 30 9.94 11.1

2003 23.4 26 9.48 10.2

2004 27.1 25 8.31 9.2

2005 28.1 26 10.02 9.3

2006 22.3 26 8.48 8.9

2007 23.2 25 9.17 9.2

2008 22 23 9.41 9

27-053-0963 2001 33.4 11.61

2002 26 10.23

2003 25 28 10.17 10.7

2004 28.6 27 8.98 9.8

2005 30 28 10.28 9.8

2006 19.4 26 8.64 9.3

2007 23.7 24 10.07 9.7

2008 25.9 23 9.96 9.6

27-053-0965 2003 21.8 9.82

2004 25.7 8.79

2005 24.2 24 10.15 9.6

2006 26.7 26 9.56 9.5

27-053-1007 2000 35 13.28

2001 32.1 11.93

2002 25.1 31 10.48 11.9

2003 23.3 27 10.04 10.8

2004 25.9 25 8.83 9.8

2005 28.1 26 9.96 9.6

2006 22.2 25 9.16 9.3

2007 25.2 25 10.16 9.8

2008 29 25 10.31 9.9

27-053-2006 2000 33.4 11.03

2001 28.8 11.41

2002 25.1 29 10.14 10.9

Minnesota PM2.5 24-Hour and Annual Design Values: 1999-2008

Page 1 of 4
County Site ID Year 24-Hour 

98th 

Percentile

24-Hour 

Design 

Values

Weighted Arith 

Means

Annual 

Design 

Values

Minnesota PM2.5 24-Hour and Annual Design Values: 1999-2008

Hennepin 27-053-2006 2003 25.9 27 9.3 10.3

2004 27.1 26 8.78 9.4

2005 29.6 28 10.09 9.4

2006 21.3 26 8.99 9.3

2007 25 25 10.13 9.7

2008 26.2 24 10.1 9.7

Mille Lacs 27-095-3051 2000 27 8.85

2001 25.1 7.32

2002 19.6 24 7.03 7.7

2003 20.7 22 6.88 7.1

2004 17.2 19 5.77 6.6

2005 27.1 22 6.96 6.5

2006 22.2 22 6.51 6.4

2007 17.5 22 6.56 6.7

2008 24.3 21 6.74 6.6

Olmsted 27-109-5008 2000 35.9 11.77

2001 30.4 12.13

2002 24.4 30 10.43 11.4

2003 26.9 27 10.14 10.9

2004 27.5 26 8.91 9.8

2005 33.3 29 11.35 10.1

2006 28.6 30 8.34 9.5

2007 26.6 30 10.29 10

2008 26.9 27 10.13 9.6

Ramsey 27-123-0866; 1 2000 42.7 13.12

2001 34.7 13.02

2002 24.3 34 11.33 12.5

2003 29.2 29 12.02 12.1

2004 28 27 10.76 11.4

2005 31.2 29 12.24 11.7

2006 23.1 27 10.55 11.2

2007 27.4 27 10.86 11.2

2008 27.5 26 11.54 11

27-123-0866; 2 2000 41.6 13.98

2001 31 12.8

2002 23.7 32 11.73 12.8

2003 27.8 28 11.51 12

2004 22.9 25 9.9 11

2005 27.8 26 12 11.1

2006 24.8 25 11.09 11

2007 27.3 27 10.45 11.2

27-123-0868; 1 1999 29.2 13.11

2000 47.1 15.26

2001 32.5 36 12.97 13.8

2002 25.9 35 11.08 13.1

2003 28.2 29 11.76 11.9

Page 2 of 4
County Site ID Year 24-Hour 

98th 

Percentile

24-Hour 

Design 

Values

Weighted Arith 

Means

Annual 

Design 

Values

Minnesota PM2.5 24-Hour and Annual Design Values: 1999-2008

Ramsey 27-123-0868; 1 2004 35.2 30 10.77 11.2

2005 28.2 31 11.76 11.4

2006 23.2 29 10.23 10.9

2007 25.9 26 10.71 10.9

2008 32 27 11.21 10.7

27-123-0871; 1 2000 33.7 12.44

2001 34.9 11.84

2002 28.3 32 10.39 11.6

2003 23.1 29 10.25 10.8

2004 25 25 8.66 9.8

2005 29.6 26 10.32 9.7

2006 24.4 26 9.1 9.4

2007 26.6 27 10.09 9.8

2008 36.4 29 10.88 10

27-123-0871; 2 2002 24.2 10.64

2003 24.7 10.3

2004 23.7 24 9.04 10

2005 27.1 25 10.72 10

2006 24.5 25 9.78 9.8

2007 26.6 26 9.84 10.1

Saint Louis 27-137-7001 2000 23.9 7.47

2001 18.3 6.87

2002 24.3 22 6.9 7.1

2003 19.7 21 6.41 6.7

2004 18.3 21 5.47 6.3

2005 21.8 20 6.31 6.1

2006 23.7 21 6.51 6.1

2007 13.7 20 5.65 6.2

2008 14.2 17 5.79 6

27-137-7550; 1 2000 20.3 7.43

2001 17.2 7.14

2002 18.3 19 6.32 7

2003 18 18 6.8 6.8

2004 18.2 18 5.56 6.2

2005 21.3 19 6.42 6.3

2006 18.3 19 6.24 6.1

2007 20.7 20 6.11 6.3

2008 21.7 20 6.51 6.3

27-137-7550; 2 2000 18.8 6.88

2001 15.4 7.09

2002 18.3 18 6.28 6.8

2003 20.8 18 6.96 6.8

2004 14.1 18 5.38 6.2

2005 20.6 19 6.61 6.3

2006 20.6 18 6.43 6.1

2007 15.1 19 5.54 6.2

Page 3 of 4
County Site ID Year 24-Hour 

98th 

Percentile

24-Hour 

Design 

Values

Weighted Arith 

Means

Annual 

Design 

Values

Minnesota PM2.5 24-Hour and Annual Design Values: 1999-2008

Saint Louis 27-137-7550; 2 2008 48.3 28 6.76 6.2

27-137-7551 2000 26.7 8.76

2001 23.4 8.81

2002 22.4 24 7.91 8.5

2003 22.9 23 8.28 8.3

2004 21.8 22 6.63 7.6

2005 25.2 23 7.78 7.6

2006 23.5 24 7.65 7.4

2007 22.7 24 7.44 7.6

2008 23.2 23 7.8 7.6

Scott 27-139-0505 2000 37.4 12.22

2001 25.4 10.81

2002 25.5 29 9.8 10.9

2003 22.1 24 9.12 9.9

2004 28.1 25 8.36 9.1

2005 27.2 26 9.62 9

2006 21 25 8.5 8.8

2007 23 24 9.36 9.2

2008 23.9 23 9.5 9.1

Stearns 27-145-3052 2000 39.2 11.17

2001 26.4 10.79

2002 23.8 30 9.24 10.4

2003 22.8 24 8.94 9.7

2004 27 25 8.17 8.8

2005 25.2 25 9.31 8.8

2006 17.5 23 7.86 8.4

2007 20.1 21 8.32 8.5

2008 23.4 20 8.9 8.4

Page 4 of 4
County Site ID 24-Hour 98th 

Percentile

24-Hour 

Design 

Values

Weighted 

Arith Mean

Annual 

Design 

Values

Brookings 46-011-0002 1999 28.9 11.36

2000 27.5 8.9

2001 20.7 26 9.42 9.9

2002 24.5 24 9.08 9.1

2003 26.6 24 10.33 9.6

2004 23.9 25 9.33 9.6

2005 24.4 25 9.67 9.8

2006 21.6 23 8.89 9.3

2007 21.1 22 8.66 9.1

2008 18.9 21 8.02 8.5

Brown 46-013-0003 2000 21.6 8.9

2001 21.6 8.61

2002 17.9 20 7.91 8.5

2003 19.4 20 8.44 8.3

2004 16.6 18 8.06 8.1

2005 21.7 19 8.97 8.5

2006 18.1 19 8.18 8.4

2007 14.7 18 7.97 8.4

2008 16.3 16 7.66 7.9

Codington 46-029-0002 2003 22.2 9.63

2004 23 10.42

2005 25.8 24 10.69 10.2

2006 23.2 24 9.92 10.3

2007 21.1 23 8.91 9.8

2008 28.4 24 9.68 9.5

Custer 46-033-0132 2005 13.4 5.39

2006 12.2 5.34

2007 17.5 14 6.21 5.6

2008 10.8 14 4.91 5.5

Jackson 46-071-0001 2000 13.4 5.38

2001 12.4 5.6

2002 13.4 13 5.15 5.4

2003 16.8 14 5.77 5.5

2004 12.1 14 5.25 5.4

2005 11.4 13 5.35 5.5

2006 13.5 12 5.38 5.3

2007 12.4 12 5.49 5.4

2008 12.8 13 5.22 5.4

Minnehaha 46-099-0006 1999 27.7 11.44

2000 25.7 9.33

2001 21.9 25 10.39 10.4

2002 22.4 23 9.19 9.6

South Dakota PM2.5 24-Hour and Annual Design Values: 1999-2008

Page 1 of 2
County Site ID 24-Hour 98th 

Percentile

24-Hour 

Design 

Values

Weighted 

Arith Mean

Annual 

Design 

Values

South Dakota PM2.5 24-Hour and Annual Design Values: 1999-2008

Minnehaha 46-099-0006 2003 24.1 23 10.44 10

2004 21.3 23 10.07 9.9

2005 26.1 24 10.68 10.4

2006 22.1 23 9.72 10.2

2007 28.4 26 9.58 10

2008 26 26 9.43 9.6

46-099-0007 1999 32.6 12.21

2000 31 9.28

2001 20.4 28 9.77 10.4

2002 22.2 25 8.99 9.3

2003 27.1 23 10 9.6

2004 22.3 24 9.62 9.5

2005 26 25 9.85 9.8

2006 23.1 24 9.37 9.6

2007 20 23 8.75 9.3

Pennington 46-103-0016 1999 25 9.09

2000 22.2 7.78

2001 21.6 23 7.85 8.2

2002 20.1 21 7.18 7.6

2003 16.8 20 7.17 7.4

2004 19.8 19 7.46 7.3

2005 15.1 17 7.5 7.4

2006 16.6 17 7.81 7.6

6-103-0019 2000 33.3 9.11

2001 21.7 9.13

2002 21 25 7.99 8.7

2003 12.9 19 6.96 8

46-103-0020; 1 2004 19.4 8.63

2005 18.4 8.58

2006 19.9 19 9.3 8.8

2007 15.5 18 8.28 8.7

2008 18.7 18 7.71 8.4

46-103-1001 1999 16.3 8.21

2000 26.2 8.75

2001 15.8 19 7.83 8.3

2002 17.6 20 7.18 7.9

2003 19.6 18 7.41 7.5

2004 15.8 18 7.25 7.3

2005 14.5 17 7.25 7.3

2006 16.1 15 7.43 7.3

2007 16.7 16 7.38 7.4

2008 15.2 16 6.7 7.2

Page 2 of 2