Evaluating Ozone Control Programs in
the Eastern United States: Focus on the
NOx Budget Trading Program, 2004
State and Local Information for EPA Region 5
Illinois
Indiana
Michigan
Minnesota
Ohio
Wisconsin
U.S. Environmental Protection Agency
Office of Air and Radiation
Office of Air Quality Planning and Standards
October 2005

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Illinois
Emissions
State total emissions of NOx and VOCs have decreased from 1997 to 2004. After 2002 the
largest emission reductions were NOx emissions from power generating sources.
Ozone Season (May-September) Emission Totals by Major Source Categories (tons)
Source Category
1997
2002
2004
NOx Emissions
Power Industry
151,738
89,884
40,975
Mobile On-Road
143,186
117,854
106,553
Other
152,316
131,154
140,867
VOC Emissions
Mobile On-Road
98,930
69,826
62,442
Solvent Usage
134,333
100,136
99,535
Other
119,601
97,299
93,843
The emissions data used in the report are measured or estimated values from EPA's National
Emissions Inventory (NEI). Starting in 1997, the NEI incorporated power industry data
measured by the Continuous Emissions Monitoring System (CEMS). For 2002, the preliminary
version of the NEI was used, which includes the 2002 CEMS data, but does not include 2002
data for other sources submitted by state, local, and tribal air agencies.
EPA used CEMS data for the power industry for 2003 and 2004. Emissions for other sources for
that period were estimated by interpolating between the 2002 preliminary NEI data and a
projected 2010 emission inventory developed to support the Clean Air Interstate Rule.
For additional information use the following online resources:
National Emissions Inventory (NEI): www.epa.gov/ttn/chief/net.
Emissions data for the power industry: http://cfpub.epa.gov/gdm .
Information on mobile sources: www.epa.gov/otaq .

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Ozone
On average, ozone has declined between 1997 and 2004. These improvements in ozone are in
response to both state and regional reductions in NOx and VOC emissions. The level of ozone
improvement varies from site to site.
Highest Fourth Daily Maximum 8-hour Ozone Concentration by Metropolitan Statistical
Area, 1997, 20C
2 and 2004
Metropolitan Statistical Area
1997
03 8-hr (ppm)
2002
03 8-hr (ppm)
2004
03 8-hr (ppm)
Chicago. IL PMSA
0.09
0.1
0.08
Bloomington—Normal. IL MSA

0.09
0.07
Champaign-Urbana, IL MSA
0.08
0.08
0.06
Davenport—Moline—Rock Island, IA--IL MSA
0.07
0.08
0.07
Decatur, IL MSA
0.08
0.09
0.06
Peoria—Pekin, IL MSA
0.07
0.08
0.07
Rockford, IL MSA
0.07
0.08
0.06
St. Louis, MO--IL MSA
0.09
0.1
0.08
Springfield, IL MSA
0.07
0.08
0.06
Level of the NAAQS is .08 ppm. Units are parts per million (ppm).


Notes:
•	Data from exceptional events are not included.
•	The reader is cautioned that this summary is not adequate in itself to numerically rank MSAs
according to their air quality.
•	The monitoring data represent the quality of air in the vicinity of the monitoring site and, for some
pollutants, may not necessarily represent urban-wide air quality.

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Trends for 1997-2004 with 95 percent confidence limits are presented below. Ozone season
averages of daily maximum 8-hour ozone were adjusted to remove the influence of year-to-year
variability in meteorology.
Seasonal Average 8-hour Ozone Trends
Chicago, IL
Bondville (BVL130)
Alhambra (ALH157)

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Indiana
Emissions
State total emissions of NOx and VOCs have decreased from 1997 to 2004. After 2002 the
largest emission reductions were NOx emissions from power generating sources.
Ozone Season (May-September) Emission Totals by Major Source Categories (tons)
Source Category
1997
2002
2004
NOx Emissions
Power Industry
166,856
126,350
68,396
Mobile On-Road
106,197
90,263
81,273
Other
79,732
95,784
103,855
VOC Emissions
Mobile On-Road
71,909
55,100
49,152
Solvent Usage
85,095
78,007
77,241
Other
67,914
67,782
65,799
The emissions data used in the report are measured or estimated values from EPA's National
Emissions Inventory (NEI). Starting in 1997, the NEI incorporated power industry data
measured by the Continuous Emissions Monitoring System (CEMS). For 2002, the preliminary
version of the NEI was used, which includes the 2002 CEMS data, but does not include 2002
data for other sources submitted by state, local, and tribal air agencies.
EPA used CEMS data for the power industry for 2003 and 2004. Emissions for other sources for
that period were estimated by interpolating between the 2002 preliminary NEI data and a
projected 2010 emission inventory developed to support the Clean Air Interstate Rule.
For additional information use the following online resources:
National Emissions Inventory (NEI): www.epa.gov/ttn/chief/net.
Emissions data for the power industry: http://cfpub.epa.gov/gdm .
Information on mobile sources: www.epa.gov/otaq .

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Ozone
On average, ozone has declined between 1997 and 2004. These improvements in ozone are in
response to both state and regional reductions in NOx and VOC emissions. The level of ozone
improvement varies from site to site.
Highest Fourth Daily Maximum 8-hour Ozone Concentration by Metropolitan Statistical
Area, 1997, 2C
)02 and 200^

Metropolitan Statistical Area
1997
03 8-hr (ppm)
2002
03 8-hr (ppm)
2004
03 8-hr (ppm)
Cincinnati, OH-KY-IN PMSA
0.09
0.1
0.08
Gary, IN PMSA
0.09
0.1
0.07
Elkhart—Goshen IN MSA
0.09
0.1
0.08
Evansville—Henderson, IN--KY MSA
0.1
0.1
0.07
Fort Wayne, IN MSA
0.09
0.1
0.07
Indianapolis, IN MSA
0.1
0.11
0.08
Louisville, KY--IN MSA
0.1
0.1
0.08
Muncie, IN MSA

0.1
0.07
South Bend, IN MSA
0.09
0.1
0.08
Terre Haute, IN MSA
0.08
0.1
0.07
Level of the NAAQS is .08 ppm. Units are parts per million (ppm).
Notes:
•	Data from exceptional events are not included.
•	The reader is cautioned that this summary is not adequate in itself to numerically rank MSAs
according to their air quality.
•	The monitoring data represent the quality of air in the vicinity of the monitoring site and, for some
pollutants, may not necessarily represent urban-wide air quality.

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Trends for 1997-2004 with 95 percent confidence limits are presented below. Ozone season
averages of daily maximum 8-hour ozone were adjusted to remove the influence of year-to-year
variability in meteorology.
Seasonal Average 8-hour Ozone Trends
Indianapolis, IN
Salamonie Reservoir (SAL133)
Vincennes (VIN140)

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Michigan
Emissions
State total emissions of NOx and VOCs have decreased from 1997 to 2004. After 2002 the
largest emission reductions were NOx emissions from power generating sources.
Ozone Season (May-September) Emission Totals by Major Source Categories (tons)
Source Category
1997
2002
2004
NOx Emissions
Power Industry
82,586
66,151
43,505
Mobile On-Road
140,185
121,556
109,231
Other
119,123
94,160
100,136
VOC Emissions
Mobile On-Road
100,439
78,745
69,661
Solvent Usage
107,621
62,897
61,777
Other
127,285
134,338
130,457
The emissions data used in the report are measured or estimated values from EPA's National
Emissions Inventory (NEI). Starting in 1997, the NEI incorporated power industry data
measured by the Continuous Emissions Monitoring System (CEMS). For 2002, the preliminary
version of the NEI was used, which includes the 2002 CEMS data, but does not include 2002
data for other sources submitted by state, local, and tribal air agencies.
EPA used CEMS data for the power industry for 2003 and 2004. Emissions for other sources for
that period were estimated by interpolating between the 2002 preliminary NEI data and a
projected 2010 emission inventory developed to support the Clean Air Interstate Rule.
For additional information use the following online resources:
National Emissions Inventory (NEI): www.epa.gov/ttn/chief/net.
Emissions data for the power industry: http://cfpub.epa.gov/gdm .
Information on mobile sources: www.epa.gov/otaq .

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Ozone
On average, ozone has declined between 1997 and 2004. These improvements in ozone are in
response to both state and regional reductions in NOx and VOC emissions. The level of ozone
improvement varies from site to site.
Highest Fourth Daily Maximum 8-hour Ozone Concentration by Metropolitan Statistical
Area, 1997, 20(
)2 and 2004
Metropolitan Statistical Area
1997
03 8-hr (ppm)
2002
03 8-hr (ppm)
2004
03 8-hr (ppm)
Ann Arbor, MI PMSA
0.08
0.09
0.07
Detroit, MI PMSA
0.09
0.1
0.08
Flint, MI PMSA
0.08
0.09
0.08
Benton Harbor, MI MSA
0.1
0.1
0.07
Grand Rapids—Muskegon—Holland. MI MSA
0.1
0.11
0.08
Kalamazoo—Battle Creek, MI MSA
0.09
0.09
0.07
Lansing-East Lansing, MI MSA
0.08
0.09
0.07
Level of the NAAQS is .08 ppm. Units are parts per million (ppm).
Notes:
•	Data from exceptional events are not included.
•	The reader is cautioned that this summary is not adequate in itself to numerically rank MSAs
according to their air quality.
•	The monitoring data represent the quality of air in the vicinity of the monitoring site and, for some
pollutants, may not necessarily represent urban-wide air quality.

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Trends for 1997-2004 with 95 percent confidence limits are presented below. Ozone season
averages of daily maximum 8-hour ozone were adjusted to remove the influence of year-to-year
variability in meteorology.
Seasonal Average 8-hour Ozone Trends
Grand Rapids, Ml	Detroit, Ml
80 -
70 -
60 -
50 -
40 -
30 H
1997
Ann Arbor (ANA115)
80 -
70 -
60 -
50 -
40 -
30 H
1997
1999
2001
2003
80 -
70 -
60 -
50 -
40 -
30 H
1997
Unionville (UVL124)
80 -
70 -
60 -
50 -
40 -
30 H
1997
1999
2001
2003
Year
Year

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Minnesota
Emissions
State total emissions of NOx and VOCs have decreased from 1997 to 2004.
Ozone Season (May-September) Emission Totals by Major Source Categories (tons)
Source Category
1997
2002
2004
NOx Emissions
Power Industry
35,998
35,145
34,583
Mobile On-Road
73,553
65,172
59,178
Other
93,872
85,435
84,199
VOC Emissions
Mobile On-Road
49,365
38,224
34,343
Solvent Usage
64,624
44,000
42,907
Other
83,770
79,469
77,555
The emissions data used in the report are measured or estimated values from EPA's National
Emissions Inventory (NEI). Starting in 1997, the NEI incorporated power industry data
measured by the Continuous Emissions Monitoring System (CEMS). For 2002, the preliminary
version of the NEI was used, which includes the 2002 CEMS data, but does not include 2002
data for other sources submitted by state, local, and tribal air agencies.
EPA used CEMS data for the power industry for 2003 and 2004. Emissions for other sources for
that period were estimated by interpolating between the 2002 preliminary NEI data and a
projected 2010 emission inventory developed to support the Clean Air Interstate Rule.
For additional information use the following online resources:
National Emissions Inventory (NEI): www.epa.gov/ttn/chief/net.
Emissions data for the power industry: http://cfpub.epa.gov/gdm .
Information on mobile sources: www.epa.gov/otaq .

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Ozone
On average, ozone has declined between 1997 and 2004. These improvements in ozone are in
response to both state and regional reductions in NOx and VOC emissions. The level of ozone
improvement varies from site to site.
Highest Fourth Daily Maximum 8-hour Ozone Concentration by Metropolitan Statistical
Area, 1997, 2C
)02 and 200^

Metropolitan Statistical Area
1997
03 8-hr (ppm)
2002
03 8-hr (ppm)
2004
03 8-hr (ppm)
Duluth-Superior, MN--WI MSA
0.07
0.07
0.06
Fargo—Moorhead, ND--MN MSA
0.07
0.06
0.06
Minneapolis--St. Paul, MN--WI MSA
0.08
0.08
0.06
Level of the NAAQS is .08 ppm. Units are parts per million (ppm).
Notes:
•	Data from exceptional events are not included.
•	The reader is cautioned that this summary is not adequate in itself to numerically rank MSAs
according to their air quality.
•	The monitoring data represent the quality of air in the vicinity of the monitoring site and, for some
pollutants, may not necessarily represent urban-wide air quality.

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Ohio
Emissions
State total emissions of NOx and VOCs have decreased from 1997 to 2004. After 2002 the
largest emission reductions were NOx emissions from power generating sources.
Ozone Season (May-September) Emission Totals by Major Source Categories (tons)
Source Category
1997
2002
2004
NOx Emissions
Power Industry
220,196
159,222
67,352
Mobile On-Road
154,561
126,563
113,777
Other
131,242
124,595
122,792
VOC Emissions
Mobile On-Road
109,539
80,375
71,303
Solvent Usage
124,680
86,370
86,833
Other
94,825
86,194
82,966
The emissions data used in the report are measured or estimated values from EPA's National
Emissions Inventory (NEI). Starting in 1997, the NEI incorporated power industry data
measured by the Continuous Emissions Monitoring System (CEMS). For 2002, the preliminary
version of the NEI was used, which includes the 2002 CEMS data, but does not include 2002
data for other sources submitted by state, local, and tribal air agencies.
EPA used CEMS data for the power industry for 2003 and 2004. Emissions for other sources for
that period were estimated by interpolating between the 2002 preliminary NEI data and a
projected 2010 emission inventory developed to support the Clean Air Interstate Rule.
For additional information use the following online resources:
National Emissions Inventory (NEI): www.epa.gov/ttn/chief/net.
Emissions data for the power industry: http://cfpub.epa.gov/gdm .
Information on mobile sources: www.epa.gov/otaq .

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Ozone
On average, ozone has declined between 1997 and 2004. These improvements in ozone are in
response to both state and regional reductions in NOx and VOC emissions. The level of ozone
improvement varies from site to site.
Highest Fourth Daily Maximum 8-hour Ozone Concentration by Metropolitan Statistical
Area, 1997, 2C
)02 and 200^

Metropolitan Statistical Area
1997
03 8-hr (ppm)
2002
03 8-hr (ppm)
2004
03 8-hr (ppm)
Akron, OH PMSA
0.09
0.1
0.08
Cincinnati, OH-KY-IN PMSA
0.09
0.1
0.08
Cleveland—Lorain—Elyria, OH PMSA
0.09
0.12
0.08
Hamilton—Middletown, OH PMSA
0.09
0.1
0.08
Canton-Massillon, OH MSA
0.08
0.1
0.08
Columbus, OH MSA
0.09
0.1
0.08
Dayton-Springfield, OH MSA
0.09
0.1
0.08
Huntington—Ashland. WV--KY--OH MSA
0.09
0.1
0.07
Lima, OH MSA
0.08
0.1
0.08
Parkcrsburg—Marietta. WV--OH MSA
0.09
0.1
0.08
Steubenville-Weirton, OH--WV MSA
0.08
0.1
0.07
Toledo, OH MSA
0.09
0.1
0.08
Wheeling, WV-OH MSA
0.08
0.1
0.06
Youngstown--Warren OH MSA
0.09
0.1
0.08
Level of the NAAQS is .08 ppm. Units are parts per million (ppm).
Notes:
•	Data from exceptional events are not included.
•	The reader is cautioned that this summary is not adequate in itself to numerically rank MSAs
according to their air quality.
•	The monitoring data represent the quality of air in the vicinity of the monitoring site and, for some
pollutants, may not necessarily represent urban-wide air quality.

-------
Trends for 1997-2004 with 95 percent confidence limits are presented below. Ozone season
averages of daily maximum 8-hour ozone were adjusted to remove the influence of year-to-year
variability in meteorology.
Seasonal Average 8-hour Ozone Trends
Cleveland, OH	Cincinnati, OH
Deer Creek (DCP114)
Lykens (LYK123)
Oxford (OXF122)
80 -
70 -
| 60-
o
o 50 -
N
o
40 -
30 -
1997	1999	2001	2003
Year

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Wisconsin
Emissions
State total emissions of NOx and VOCs have decreased from 1997 to 2004. After 2002 the
largest emission reductions were NOx emissions from power generating sources.
Ozone Season (May-September) Emission Totals by Major Source Categories (tons)
Source Category
1997
2002
2004
NOx Emissions
Power Industry
47,519
40,454
30,633
Mobile On-Road
85,530
71,611
64,479
Other
67,683
58,312
57,570
VOC Emissions
Mobile On-Road
55,672
40,886
36,509
Solvent Usage
76,066
57,187
55,501
Other
75,709
63,532
61,676
The emissions data used in the report are measured or estimated values from EPA's National
Emissions Inventory (NEI). Starting in 1997, the NEI incorporated power industry data
measured by the Continuous Emissions Monitoring System (CEMS). For 2002, the preliminary
version of the NEI was used, which includes the 2002 CEMS data, but does not include 2002
data for other sources submitted by state, local, and tribal air agencies.
EPA used CEMS data for the power industry for 2003 and 2004. Emissions for other sources for
that period were estimated by interpolating between the 2002 preliminary NEI data and a
projected 2010 emission inventory developed to support the Clean Air Interstate Rule.
For additional information use the following online resources:
National Emissions Inventory (NEI): www.epa.gov/ttn/chief/net.
Emissions data for the power industry: http://cfpub.epa.gov/gdm .
Information on mobile sources: www.epa.gov/otaq .

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Ozone
On average, ozone has declined between 1997 and 2004. These improvements in ozone are in
response to both state and regional reductions in NOx and VOC emissions. The level of ozone
improvement varies from site to site.
Highest Fourth Daily Maximum 8-hour Ozone Concentration by Metropolitan Statistical
Area, 1997, 2C
)02 and 200^

Metropolitan Statistical Area
1997
03 8-hr (ppm)
2002
03 8-hr (ppm)
2004
03 8-hr (ppm)
Kenosha, WIPMSA
0.09
0.12
0.08
Milwaukee-Waukesha, WI PMSA
0.1
0.1
0.07
Racine, WI PMSA
0.1
0.11
0.07
Appleton-Oslikosh-Neenah WI
0.08
0.08
0.07
Duluth-Superior, MN--WI MSA
0.07
0.07
0.06
Green Bay, WI MSA
0.07
0.08
0.07
Janesville-Beloit, WI MSA
0.09
0.09
0.07
Madison, WI MSA
0.08
0.08
0.07
Minneapolis~St. Paul, MN--WI MSA
0.08
0.08
0.06
Sheboygan, WI MSA
0.09
0.11
0.08
Wausau, WI MSA
0.07
0.07
0.07
Level of the NAAQS is .08 ppm. Units are parts per million (ppm).


Notes:
•	Data from exceptional events are not included.
•	The reader is cautioned that this summary is not adequate in itself to numerically rank MSAs
according to their air quality.
•	The monitoring data represent the quality of air in the vicinity of the monitoring site and, for some
pollutants, may not necessarily represent urban-wide air quality.
Trends for 1997-2004 with 95 percent confidence limits are presented below. Ozone season
averages of daily maximum 8-hour ozone were adjusted to remove the influence of year-to-year
variability in meteorology.
Seasonal Average 8-hour Ozone Trends
Milwaukee, WI
80 -
70 -
a 60-
40 -
30 -
1997	1999	2001	2003
Year

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