Technical Support Document for EPA’s Proposed Action on the

State of Nevada’s 2009 Infrastructure State Implementation Plan (Transport Portion) for the

2006 24-hour Fine Particulate (PM2.5) National Ambient Air Quality Standard

Appendix D – IMPROVE Monitoring Data

D.1. IMPROVE Monitoring Site Map and Description

D.2. Utah IMPROVE Monitoring Data for 2006-2010 (Fine Mass)

D.3. Nevada IMPROVE Monitoring Data for 2006-2010 (Fine Mass)

D.2. California/Oregon Border IMPROVE Monitoring Data for 2006-2010 (Fine Mass)
D.1. IMPROVE Monitoring Site Map and Description

(IMPROVE/Protocol Network in year 2002)1

State National Parks Referenced in TSD

Utah Bryce Canyon (51), Canyonlands (50), Capitol Reef (52), Zion (49)

Nevada Great Basin (116), Jarbidge Wilderness Area (68)

California-Oregon Border Crater Lake (86), Lava Beds National Monument (87)

IMPROVE Monitoring Program Overview

The Interagency Monitoring of Protected Visual Environments (IMPROVE) program is a cooperative 

measurement effort governed by a steering committee composed of representatives from Federal and 

regional-state organizations. The IMPROVE monitoring program was established in 1985 to aid the 

creation of Federal and State implementation plans for the protection of visibility in Class I areas (156 

national parks and wilderness areas) as stipulated in the 1977 amendments to the Clean Air Act. 

The objectives of IMPROVE include: 

(1) establishing current visibility and aerosol conditions in mandatory class I areas; and

(2) identifying chemical species and emission sources responsible for existing man-made visibility 

impairment.

 1 http://vista.cira.colostate.edu/improve/Overview/IMPROVENetworkExp.htm

.

IMPROVE Sites (1-110)

Protocol Sites (111-163)

2

1

125

126

4

128

129

127

3

130

131

132

133

135

137 5

136

138

8

6

7

22

25

23 24

139

140

14

30

29

27

28

26

21

141

9

10 13

11

12

15

16

17

142

20 18

19

106

105

103

102

111

108

107

31

32

36

37

42 38

33

34

35

41

39 40

120

122

123

44

121

43

45

46

47

48

124

117

49

51

52 50

201

54

55

53

56

57 58

114

116

101

100

99

93

94

118

98

110

109

92

96 97

91 95

104 90 68

88

87

89

86 76

84

85 112

79

78

83

80

82

81

134

77

69

70

202

71

75 72

73

74 64

63 62

61

59

60

119

65

67

66

143

144

QA Sites (201-202)

159

158 157

156

155

154 153

151 152

150

149

148

147

146

145

160

161

162 163
The particulate monitoring portion of the IMPROVE program measures the concentration of the fine 

(PM2.5) particles for mass, optical absorption, major and trace elements, organic and elemental carbon, 

and nitrate and of PM10 particles for mass. Prior to 2000, IMPROVE sites collect two samples per 

week, on Wednesday and Saturday. With the implementation of the Regional Haze Rule the IMPROVE 

program changed to a 1-in-3 day schedule.

http://vista.cira.colostate.edu/improve/Overview/Overview.htm
1

D.2. Utah IMPROVE Monitoring Data for 2006-2010 (Fine Mass)

2006
2

2006
3

2007
4

2007
5

2008
6

2008
7

2009
8

2009
9

2010
10

2010

Note: There is no IMPROVE monitoring data for Zion National Park for 2010 (Fine Mass).
1

D.3. Nevada IMPROVE Monitoring Data for 2006-2010 (Fine Mass)

2006
2

2007
3

2008
4

2009
5

2010
1

D.4. California-Oregon Border IMPROVE Monitoring Data

for 2006-2010 (Fine Mass)

2006
2

2007
3

2008
4

2009
5

2010