Progress Report
Index of Graphics
Please select any of the following thumbails to view the specific chart or map.
Program Basics Figures
![History of the ARP, NBP, CAIR, CSAPR and MATS](img/program_basics_f1_small.png)
![Map of CSAPR Implementation for 2021](img/program_basics_f2_small.png)
![Electricity Generation from ARP and CSAPR-Affected Power Plants, 2005–2021](img/program_basics_f3_small.png)
Regulated Emissions Sources Figures
![Regulated Emissions Sources in CSAPR and ARP, 2021](img/regulated_emissions_sources_f1_small.png)
![Regulated Emissions Sources in CSAPR and ARP, 2021](img/regulated_emissions_sources_f2_small.png)
Sulfur Dioxide (SO₂) Figures
![SO₂ Emissions from CSAPR and ARP Sources, 1980–2021](img/emissions_reductions_so2_f1_small.png)
![State-by-State SO₂ Emissions for CSAPR and ARP Sources, 1990–2021](img/emissions_reductions_so2_f2_small.png)
![Comparison of SO₂ Emissions and Generation for CSAPR and ARP Sources, 2000–2021](img/emissions_reductions_so2_f3_small.png)
Annual Nitrogen Oxides Figures
![Annual NOₓ Emissions from CSAPR and ARP Sources, 1990–2021](img/emissions_reductions_nox_f1_small.png)
![State-by-State Annual NOₓ Emissions from CSAPR and ARP Sources, 1990–2021](img/emissions_reductions_nox_f2_small.png)
![Comparison of Annual NOₓ Emissions and Generation for CSAPR and ARP Sources, 2000–2021](img/emissions_reductions_nox_f3_small.png)
Ozone Season Nitrogen Oxides Figures
![Ozone Season NOₓ Emissions from CSAPR and ARP Sources, 2005–2021](img/emissions_reductions_ozone_f1_small.png)
![State-by-State Ozone Season NOₓ Emissions from CSAPR and ARP Sources, 2000–2021](img/emissions_reductions_ozone_f2_small.png)
![Comparison of Ozone Season NOₓ Emissions and Generation for CSAPR and ARP Sources, 2000–2021](img/emissions_reductions_ozone_f3_small.png)
Mercury and Air Toxics Figures
![Mercury Emissions from MATS Sources, 2010–2021](img/emissions_reductions_mats_f1_small.png)
![State-by-State Mercury Emissions from MATS Sources, 2021](img/emissions_reductions_mats_f2_small.png)
Emission Controls and Monitoring Figures
![SO₂ Emissions Controls in the ARP and CSAPR SO₂ Program, 2021](img/emissions_controls_and_monitoring_f1_small.png)
![CSAPR SO₂ Program Monitoring Methodology, 2021](img/emissions_controls_and_monitoring_f2_small.png)
![NOₓ Emissions Controls in CSAPR NOₓ Annual Program, 2021](img/emissions_controls_and_monitoring_f3_small.png)
![CSAPR NOₓ Annual Program Monitoring Methodology, 2021](img/emissions_controls_and_monitoring_f4_small.png)
![NOₓ Emissions Controls in CSAPR NOₓ Ozone Season Program, 2021](img/emissions_controls_and_monitoring_f5_small.png)
![CSAPR NOₓ Ozone Season Program Monitoring Methodology, 2021](img/emissions_controls_and_monitoring_f6_small.png)
![Mercury Controls at MATS-Affected Sources, 2021](img/emissions_controls_and_monitoring_f7_small.png)
![Mercury Compliance and Monitoring Methods used by Units Reporting Hourly Data under MATS, 2021](img/emissions_controls_and_monitoring_f8_small.png)
Program Compliance Tables
![ARP SO₂ Program Allowance Reconciliation Summary, 2021](img/program_compliance_f1_small.png)
![CSAPR SO₂ Group 1 Program Allowance Reconciliation Summary, 2021](img/program_compliance_f2_small.png)
![CSAPR SO₂ Group 2 Program Allowance Reconciliation Summary, 2021](img/program_compliance_f3_small.png)
![CSAPR NOₓ Annual Program Allowance Reconciliation Summary, 2021](img/program_compliance_f4_small.png)
![CSAPR NOₓ Ozone Season Program Group 1 Allowance Reconciliation Summary, 2021](img/program_compliance_f5_small.png)
![CSAPR NOₓ Ozone Season Program Group 2 Allowance Reconciliation Summary, 2021](img/program_compliance_f6_small.png)
![CSAPR NOₓ Ozone Season Program Group 3 Allowance Reconciliation Summary, 2021](img/program_compliance_f7_small.png)
Market Activity Figures
![2021 Allowance Transfers under CSAPR and ARP](img/market_activity_f1_small.png)
![Allowance Spot Price (Prompt Vintage), January–December 2021](img/market_activity_f2_small.png)
Sulfur Dioxide and Nitrogen Oxides Trends Figures
![National SO₂ Air Quality Trend, 1980–2021](img/air_quality_so2_f1_small.png)
![Regional Changes in Air Quality](img/air_quality_so2_f2_small.png)
Ozone Figures
![Percent Change in the Highest Values (99ᵗʰ percentile) of 1-hour Ozone Concentrations during the Ozone Season, 2000–2002 versus 2019–2021](img/air_quality_ozone_f1_small.png)
![Shifts in 8-Hour Seasonal Rural Ozone Concentrations in CSAPR NOₓ Ozone Season and CSAPR Update Regions, 1990–2021](img/air_quality_ozone_f2_small.png)
![Seasonal Average of 8-Hour Ozone Concentrations in CSAPR and CSAPR Update States, Unadjusted and Adjusted for Weather](img/air_quality_ozone_f3_small.png)
![Changes in 1997 Ozone NAAQS Nonattainment Areas in CSAPR Region, 2001–2003 (Original Designations) versus 2019–2021](img/air_quality_ozone_f4_small.png)
![Changes in 2008 Ozone NAAQS Nonattainment Areas, 2008–2010 (Original Designations) versus 2019–2021](img/air_quality_ozone_f5_small.png)
Particulate Matter Figures
![PM₂.₅ Seasonal Trends, 2000–2021](img/air_quality_pm_f1_small.png)
![Changes in the 1997 Annual PM₂.₅ NAAQS Nonattainment Areas in CSAPR States, 2001–2003 (Original Designations) versus 2019–2021](img/air_quality_pm_f2_small.png)
Affected Communities Figures
![Map of Power Plants Covered by Programs](img/affected_communities_f1_small.png)
![Comparative Percentages](img/affected_communities_f2_small.png)
![Comparative Generation and Emissions](img/affected_communities_f3_small.png)
![Changes in Power Plant Emissions](img/affected_communities_f4_small.png)
Acid Deposition Figures
![Three-Year Average of Total Sulfur Deposition](img/acid_deposition_f1_small.png)
![Three-Year Average of Total Nitrogen Deposition](img/acid_deposition_f2_small.png)
![Regional Trends in Deposition](img/acid_deposition_f3_small.png)
Ecosystem Health Figures
![Long-term Monitoring Program Sites and Trends, 1990–2021](img/ecosystem_response_eco_f1_small.png)
![Regional Trends in Sulfate, Nitrate, ANC, and Base Cations at Long-term Monitoring Sites, 1990–2021](img/ecosystem_response_eco_f2_small.png)
![Estimated Black Cherry, Yellow Poplar, Sugar Maple, Eastern White Pine, Virginia Pine, Red Maple, and Quaking Aspen Biomass Loss Due to Ozone Exposure, 2000–2002 versus 2019–2021](img/ecosystem_response_eco_f3_small.png)
Critical Loads Analysis Figures
![Lake and Stream Exceedances of Estimated Critical Loads for Total Nitrogen and Sulfur Deposition, 2000–2002 versus 2019–2021](img/ecosystem_response_cl_f1_small.png)
![Critical Load Exceedances by Region, 2000–2002 versus 2019–2021](img/ecosystem_response_cl_f2_small.png)