Evaluating Ozone Control Programs in the Eastern United States: Focus on the NOx Budget Trading Program, 2004 State and Local Information for EPA Region 7 Iowa Missouri U.S. Environmental Protection Agency Office of Air and Radiation Office of Air Quality Planning and Standards October 2005 ------- Iowa 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 31,302 33,845 31,071 Mobile On-Road 45,834 39,150 35,021 Other 62,792 62,748 61,505 VOC Emissions Mobile On-Road 30,191 22,211 19,806 Solvent Usage 46,059 38,461 38,158 Other 34,031 32,545 31,475 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 . ------- 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, 2002 and 2004 Metropolitan Statistical Area 1997 03 8-hr (ppm) 2002 03 8-hr (ppm) 2004 03 8-hr (ppm) Cedar Rapids, IA MSA 0.07 0.07 0.06 Davenport—Moline—Rock Island, IA--IL MSA 0.07 0.08 0.07 Des Moines, IA MSA 0.06 0.06 0.06 Omaha, NE--IA 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. ------- Missouri 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 82,298 56,277 40,610 Mobile On-Road 95,336 80,135 72,245 Other 73,527 82,139 79,854 VOC Emissions Mobile On-Road 63,338 47,805 42,873 Solvent Usage 48,690 38,921 38,117 Other 65,670 62,867 60,393 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 . ------- 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) Kansas City, MO--KS MSA 0.1 0.09 0.07 St. Louis, MO--IL MSA 0.09 0.1 0.08 Springfield, MO 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. 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 Saint Louis, MO ------- |