Year

8-hour O3 

Std (0.075 

ppm)

1-hr NO2 

Std (ppb)

Dunn 98th 

%ile 1-hr 

NO2

Dunn 

Annual 

Mean NO2

Dunn 4th 

Max 8-hr 

O3

Hannover 

98th %ile 1-

hr NO2

Hannover 

Annual 

Mean NO2

Hannover 

4th Max 8-

hr O3

1979 0.075 100

1980 0.075 100 10 0.24 0.08

1981 0.075 100 7 0.1 0.064

1982 0.075 100 9 0.13 0.051

1983 0.075 100 11 0.17 0.059

1984 0.075 100 12 0.15 0.06

1985 0.075 100 8 0.17 0.055

1986 0.075 100 13 0.19 0.059

1987 0.075 100 11 0.17 0.057

1988 0.075 100 13 0.32 0.064 28 0.64 0.074

1989 0.075 100 13 0.17 23 0.65 0.067

1990 0.075 100 22 0.41 0.053

1991 0.075 100 22 0.61 0.059

1992 0.075 100 22 0.67 0.061

1993 0.075 100 23 1 0.053

1994 0.075 100 19 1.95 0.057

1995 0.075 100 23 2 0.057

1996 0.075 100 22 1.41 0.057

1997 0.075 100 23 2.02 0.062

1998 0.075 100 6 1 25 2.37 0.06

1999 0.075 100 11 1.52 0.058 25 2.64 0.059

2000 0.075 100 11 1.88 0.053 22 2.49 0.055

2001 0.075 100 13 1.79 0.058 24 2.57 0.056

2002 0.075 100 10 1.59 0.058 22 2.19 0.058

2003 0.075 100 9 1.7 0.066 22 2.18 0.062

2004 0.075 100 11 1.92 0.05 23 2.32 0.05

2005 0.075 100 9 1.19 0.054 21 1.73 0.057

2006 0.075 100 14 1.58 0.061 21 1.93 0.064

2007 0.075 100 12 1.38 0.058 21 1.84 0.059

2008 0.075 100 15 1.69 0.06 24 1.96 0.06

2009 0.075 100 11 1.39 0.054 20 1.94 0.057

2010 0.075 100 13 1.44 0.058 19 2.2 0.061

2011 0.075 100 8 1.38 0.054 13 1.29 0.058

2012 0.075 100 13 1.92 0.057 17 2.11 0.057
TRNP-NU 

98th %ile 

1-hr NO2

TRNP-NU 

Annual 

Mean NO2

TRNP-NU 

4th Max 8-

hr O3

Fargo 

98th %ile 

1-hr NO2

Fargo 

Annual 

Mean NO2

Fargo 4th 

Max 8-hr 

O3

Bismarck 

98th %ile 

1-hr NO2

Bismarck 

Annual 

Mean NO2

Bismarck 

4th Max 8-

hr O3

0.062

0.061

0.054

0.056

0.053

0.066

0.065

0.062

0.06

0.057

0.055

0.057

0.058

0.059

0.071

0.062 36 6.44 0.061

42 6.23 0.066

40 6.59 0.062

7 1.19 0.056 40 6.45 0.062

6 1.17 0.06 33 5.62 0.062

9 1.35 0.071 39 6.23 0.065

8 1.52 0.059 42 6.12 0.056

6 1.01 0.057 38 5.57 0.061 36 8.43

8 1.02 0.066 38 5.75 0.065 34 6.8 0.063

7 0.49 0.065 36 4.95 0.055 37 6.17 0.058

8 0.85 0.062 39 5.41 0.055 36 5.85 0.058

7 0.74 0.056 42 4.9 0.057 39 5.86 0.054

10 1.15 0.062 44 5.44 0.063 38 5.71 0.061

10 1.12 0.059 40 4.45 0.057 37 4.85 0.056

9 1.2 0.057 34 4.57 0.063 34 5.36 0.057
Beulah 

98th %ile 

1-hr NO2

Beulah 

Annual 

Mean NO2

Beulah 

4th Max 8-

hr O3

27 2.82 0.06

28 4.71 0.05

27 2.13 0.062

31 2.37 0.056

23 1.69

24 1.72

25 1.68

26 1.9

33 2.16

27 2.11 0.065

27 2.1 0.061

31 2.01 0.059

25 2.05 0.064

29 2.73 0.054

28 3.75 0.054

27 3.73 0.056

33 3.73 0.058

32 3.85 0.064

28 4.29 0.061

22 3.16 0.059

25 3.43 0.054

21 3.37 0.057

20 3 0.065

22 2.96 0.064

20 2.98 0.053

21 2.45 0.057

21 2.58 0.067

23 2.55 0.059

21 2.65 0.061

26 2.73 0.055

26 2.75 0.061

22 2.3 0.059

23 2.7 0.061
Year

Lostwood 

98th %ile 1-

hr NO2

Lostwood 

Annual 

Mean NO2

Lostwood 

4th Max 8-

hr O3

1988 15 0.45

1989 11 0.25

1990 10 0.15

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

2002

2003 14 2.77

2004 12 1.86 0.057

2005 13 1.11 0.056

2006 11 1.09 0.06

2007 15 1.31 0.059

2008 15 1.27 0.059

2009 17 1.6 0.059

2010 21 1.86 0.063

2011 14 1.78 0.06

2012 15 2.02 0.056
State County

North Dakota Burke 8

North Dakota Burleigh Bismarck, ND 8

North Dakota Cass Fargo, ND-MN Fargo-Wahpeton, ND-MN 8

North Dakota Dunn 8

North Dakota McKenzie 8

North Dakota Mercer 8

North Dakota Oliver 8

2003

2004

2005

2006

2007

2008

2009

2010

2011

2012

Year
Site No.

3801300041 Lostwood

3801500031 Bismarck

3801710041 Fargo 0.063 0.061 0.060

3802500031 Dunn 0.060 0.058 0.056

3805300021 TRNP-NU 0.063 0.062

3805700041 Beulah 0.062 0.060 0.058

3806500021 Hannover 0.056 0.056
0.057 0.058 0.059 0.059 0.060 0.060 0.059

0.059 0.056 0.057 0.057 0.058

0.060 0.060 0.058 0.055 0.058 0.059 0.061

0.055 0.057 0.059 0.057

0.060 0.062 0.064 0.061 0.060 0.059 0.059

0.059 0.061 0.062 0.058 0.059 0.058 0.060

0.057 0.060 0.061 0.058 0.059 0.058 0.058
Year

1-hr SO2 

Std (ppb)

Dunn 99th 

Percentile 1-

hr SO2

Hannover 

99th 

Percentile 1-

hr SO2

Beulah 

99th 

Percentile 1-

hr SO2

TRNP-NU 

99th 

Percentile 1-

hr SO2

Fargo 

99th 

Percentile 1-

hr SO2

Bismarck 

99th 

Percentile 1-

hr SO2

Beulah 

99th 

Percentile 1-

hr SO2

1979 75 30

1980 75 11 51 25 31

1981 75 15 32 26 44

1982 75 25 39 33 115

1983 75 16 48 31 39

1984 75 25 39 41 25

1985 75 15 52 43 37

1986 75 20 26 32 30

1987 75 14 42 43 23

1988 75 17 72 51 21

1989 75 19 78 43 25

1990 75 17 55 46 17

1991 75 11 55 42 10

1992 75 18 68 47 15

1993 75 20 56 59 20

1994 75 21 50 62 27

1995 75 23 69 40 17 16

1996 75 26 66 66 21 21

1997 75 14 55 39 14 26

1998 75 21 87 71 14 20

1999 75 17 88 46 7

2000 75 21 65 40 6

2001 75 17 45 54 7 8

2002 75 14 59 29 9 5

2003 75 18 69 38 14 5

2004 75 14 69 31 13 6

2005 75 12 61 39 10 7 18

2006 75 13 45 26 10 4.7 23

2007 75 10 63 40 13.2 4.8 31

2008 75 16 55 31 10.5 4.7 34

2009 75 9.5 42 26 10.1 5.9 30

2010 75 19 59 52 11.2 6.1 41

2011 75 9.5 52 23 9.1 3.9 22

2012 75 10 40 28 10.1 3.5 23

75

75
Lostwood 

35

35

25

31

32.4

36.8

55.6

45.2

29.6

23.9
Year

Bismarck2

.5 annual

Bismarck 

2.5 24hr

Bismarck 

PM10 

24hr

Bismarck 

PM10 

24hr 2nd

Fargo 

PM2.5 

annual

Fargo 

PM2.5 

24hr

Fargo 

PM10 

24hr

1985 70 64 54

1986 122 89 129

1987 98 44 66

1988 56 42 56

1989 65 50 50

1990 106 84 203

1991 84 50 59

1992 85 44 58

1993 55 44 45

1994 48 39 43

1995 30 24 56

1996 28 27 56

1997 27 26 67

1998 52 32 52

1999 7.61 23 9.39 26.7 70

2000 6.62 14.3 7.71 26.4 42

2001 6.68 17.1 84 44 8.43 23.9

2002 6.38 15.5 72 41 7.35 21 149

2003 7.24 16 60 51 7.89 18.4 79

2004 6.17 17.9 43 33 7.52 26 39

2005 6.54 16.9 43 40 7.58 22.6 58

2006 6.79 21.3 56 51 8.16 18.9 73

2007 6.82 13.5 79 44 7.5 15 77

2008 6.95 14.4 86 85 8.33 23.5 64

2009 6.39 15.1 43 37 7.63 19.9 26

2010 7.65 17.8 54 44 8.46 26.7 104

2011 5.67 12.2 74 62 7.73 21.3 98

2012 6.37 16.3 65 56 7.51 23.2 114
Fargo 

PM10 

24hr 2nd

Dunn 

PM2.5 

annual

Dunn 

PM2.5 

24hr

Dunn 

PM10 

24hr

Dunn 

PM10 

24hr 2nd

TRNP 

PM2.5 

annual

TRNP 

PM2.5 

24hr

TRNP 

PM10 

24hr

TRNP 

PM10 24 

hr 2nd

48 53 52

58 41 40

45 66 48 17 16

44 44 23

46

75

44

54

39

39

40

53

63

47

64

39

51 5.26 12.8 30 26

60 5.67 11.7 42 31

36 42 42 4.88 8.8 30 15

55 82 41 4.74 12.3 35 29

55 53 50 5.16 17.9 37 35

51 57 41 47 44

37 108 53 58 45

25 54 52 44 40

96 32 32 8.59 18.6 31 29

89 6.39 13.9 96 74 8.8 17 35 30

92 5.78 16.6 103 73 6.99 17.4 35 34
Beulah 

PM2.5 

annual

Beulah 

PM2.5 

24hr

Beulah 

PM10 

24hr

Beulah 

PM10 

24hr 2nd

Hannover 

PM2.5 

annual

Hannover 

PM2.5 24hr

Hannover 

PM10 24hr

Hannover 

PM10 24hr 

2nd

Lostwood 

PM2.5 

annual

45

66

39

79 45

31 30

45 28

6.91 20.9

6.12 11.5

5.86 16.1

5.93 15.5

7.24 24.5

5.63 10.8

5.58 18.5

6.26 18.9 40 35

6.63 13.5 40 39

6.56 13.2 94 84

5.47 13.5 34 32

6.35 14.9 49 43 8.04

5.08 10.9 53 46 3.91 14.3 15 12 7.38

6 16.9 38 33 5.92 14.4 14 14 7.21
Lostwood 

PM2.5 24hr

Lostwood 

PM10 24hr

Lostwood 

PM10 24hr 

2nd

25 24

43 41

56 37

38 21

52 44

54 48

107 56

51 48

13 12

72 59

39 31

52 39

76 43

32 30

31 27

16 48 46

13.7 63 52

15.7 53 48
0

5

10

15

20

25

30

35

40

45

50

1975 1980 1985 1990 1995 2000 2005 2010 2015

PPB

Year

ND NO2 Trends

Dunn 98th %ile 1-hr NO2

Dunn Annual Mean NO2

Hannover 98th %ile 1-hr NO2

Hannover Annual Mean NO2

TRNP-NU 98th %ile 1-hr NO2

TRNP-NU Annual Mean NO2

Lostwood 98th %ile 1-hr NO2

Lostwood Annual Mean NO2

Fargo 98th %ile 1-hr NO2

Fargo Annual Mean NO2

Bismarck 98th %ile 1-hr NO2

Bismarck Annual Mean NO2

Beulah 98th %ile 1-hr NO2

Beulah Annual Mean NO2

All 98th percentile 

values are less than half the 

standard- 100 PPB.
0

0.01

0.02

0.03

0.04

0.05

0.06

0.07

0.08

0.09

1970 1980 1990 2000 2010 2020

PPM

Year

ND O3 Trends - Annual 4th Max 8-hr O3Standard

Dunn 4th Max 8-hr O3

Hannover 4th Max 8-hr O3

Lostwood 4th Max 8-hr O3

TRNP-NU 4th Max 8-hr O3

Fargo 4th Max 8-hr O3

Bismarck 4th Max 8-hr O3

Beulah 4th Max 8-hr O3

8-hour O3 Std (0.075 ppm)
0

20

40

60

80

100

120

140

1975 1980 1985 1990 1995 2000 2005 2010 2015

PPB

Year

ND SO2 Trends - 99th Percentile 1-hr SO2 Standard

Lostwood

Dunn Center

Bismarck

Hannover

Fargo

Buehla

TRNP

1-hr SO2 Std (ppb)
0

2

4

6

8

10

12

14

1999 2001 2003 2005 2007 2009 2011 2013

ug/m3

All ND PM 2.5 Annual Mean

Bismarck PM 2.5 annual mean

Fargo PM2.5 annual

Dunn PM2.5 annual

TRNP PM2.5 annual

Beulah PM2.5 annual

Hannover PM2.5 annual

Lostwood PM2.5 annual

PM 2.5 Annual Standard
0

5

10

15

20

25

30

35

40

1999 2001 2003 2005 2007 2009 2011 2013

ug/m3

All ND PM2.5 24 hr

Bismarck 2.5 24hr

Fargo PM2.5 24hr

Dunn PM2.5 24hr

Hannover PM2.5 24hr

Lostwood PM2.5 24hr

TRNP PM2.5 24hr

Beulah PM2.5 24hr

PM 2.5 24-hr Standard
0

10

20

30

40

50

60

70

80

90

100

110

120

130

140

150

160

170

180

190

200

1980 1985 1990 1995 2000 2005 2010 2015

ug/m3

All ND PM10 24 hr 1st max

Bismarck PM10 24hr

Fargo PM10 24hr

Dunn PM10 24hr

TRNP PM10 24hr

Beulah PM10 24hr

Hannover PM10 24hr

Lostwood PM10 24hr

PM10 24-hr Standard
0

10

20

30

40

50

60

70

80

90

100

110

120

130

140

150

160

170

180

190

200

1980 1985 1990 1995 2000 2005 2010 2015

ug/m3

All ND PM10 24 hr 2nd max

Bismarck PM10 24hr 2nd

Fargo PM10 24hr 2nd

Dunn PM10 24hr 2nd

TRNP PM10 24 hr 2nd

Beulah PM10 24hr 2nd

Hannover PM10 24hr 2nd

Lostwood PM10 24hr 2nd

PM10 24-hr Standard
0.000

0.005

0.010

0.015

0.020

0.025

0.030

0.035

0.040

0.045

0.050

0.055

0.060

0.065

0.070

0.075

0.080

0.085

0.090

0.095

0.100

2003 2004 2005 2006 2007 2008 2009 2010 2011 2012

PPM

Design Value Years

Historical Ozone Design Values

Lostwood

Bismarck

Fargo

Dunn

TRNP-NU

Beulah

Hannover

8-Hour Ozone Standard