Cross-State Air Pollution Rule (CSAPR)
Technical Information and Support Documents
The United States Court of Appeals for the D.C. Circuit issued its ruling to stay the CSAPR pending judicial review. The court's decision is not a decision on the merits of the rule. EPA is ensuring the transition back to the Clean Air Interstate Rule (CAIR) occurs as seamlessly as possible. Please see our Bulletins page for updates on CSAPR and the continuing implementation of CAIR.
You will need Adobe Acrobat Reader to view the Adobe PDF files on this page. See EPA's PDF page for more information about getting and using the free Acrobat Reader.
You will need Microsoft Excel to view the Excel spreadsheet files on this page. Microsoft offers a Free Excel Viewer 
if you don't own Excel.
Final Cross-State Air Pollution Rule (CSAPR) Revisions and Direct Final Rules
Technical Support Documents for the Final CSAPR Revisions Rule
- Final Revisions Rule State Budgets and New Unit Set-Asides TSD (PDF 1 MB)
- Final Revisions Rule Significant Contribution Assessment TSD (PDF 1.4 MB)
- Final Revisions Rule Unit Level Allocations under the FIPs (PDF 4.5 MB) | Also available in Excel (Excel 5.2 MB)
- Assessment of Impact of Consent Decree Annual Tonnage Limits on Transport Rule Allocations [Not updated from Proposed Revisions] (PDF 332 KB)
Technical Support Documents for the CSAPR Direct Final Rule
- Final Revisions Rule State Budgets and New Unit Set-Asides TSD (PDF 1 MB)
- Revisions Rule Part II Unit-Level Allocations under the FIPs (PDF 4.5 MB) | Also available in Excel (Excel 5.2 MB)
Disclaimer: The official version of these documents will be in the docket when the rule is published in the Federal Register.
Final Cross-State Air Pollution Rule (CSAPR) and Supplemental Rulemaking
EPA analyzed the impact of the final Cross-State Air Pollution Rule (CSAPR) on the U.S. electric power sector using the Integrated Planning Model (IPM). Modeling results and documentation can be downloaded from EPA's IPM website.
Technical Support Documents for the Supplemental Notice of Final Rulemaking (SNFR):
- Determination of State Budgets for the Final Ozone Supplemental of the Transport Rule TSD (PDF 10 pp, 100 Kb)
- Transport Rule Supplemental Notice of Final Rulemaking TSD (PDF 4 pp, 83 Kb)
Technical Support Documents for the Final Cross-State Air Pollution Rule (CSAPR) and the Supplemental Notice of Proposed Rulemaking (SNPR):
- Significant Contribution and State Emissions Budgets Final Rule TSD (PDF 56 pp, 1.8 MB)
- Allowance Allocation Final Rule TSD (PDF 19 pp, 345 Kb)
- *Final CSAPR Unit Level Allocations under the FIP (PDF 99 pp, 407 kb)
- *Final CSAPR Unit Level Allocations under the FIP and Underlying Data (Excel 4.1 MB)
- Proposed Unit Level Ozone Season NOx Allowance Allocations to Existing Units in Six States: Supplemental Proposed Rule TSD (PDF 18 pp, 590 kb)
*For annual SO2 and NOX allocations, tables include sources located in states covered by the CSAPR. For ozone-season allocations, tables include sources located in states covered by the final CSAPR as well as the 6 states that are included in the Supplemental Notice of Proposed Rulemaking for ozone-season NOX emission reductions.
- Assurance Penalty Level Analysis Final Rule TSD (PDF 9 pp, 322 kb)
- Status of CAA 110(a)(2)(D)(i)(I) SIPs Final Rule TSD (PDF 12 pp, 91 kb)
- Status of CAA 110(a)(2)(D)(i)(I) SIPs: Supplemental Proposed Rule TSD (PDF 4 pp, 51 kb)
- Power Sector Variability Final Rule TSD (PDF 35 pp, 818 kb)
- Capacity Factors Analysis for New Units Final Rule TSD (PDF 6 pp, 127 kb)
- Resource Adequacy and Reliability in the IPM Projections for the CSAPR TSD (PDF 12 pp, 552 kb)
- Emissions Inventory Final Rule TSD (PDF 120 pp, 2.4 MB)
- 2012_Projection (Excel 4.1 MB)
- 2014_Projection (Excel 5.1 MB)
- EmissionsSummaries (Excel 1.2 MB)
- EITSD Appendices (PDF 46 pp, 903 kb)
- Air Quality Modeling Final Rule TSD (PDF 363 pp, 11.3 MB)
- Average and maximum design values by monitoring site for 8-hour ozone, annual PM2.5, and 24-hour PM2.5 for the 2003-2007 base period, the 2012 base case, and the 2014 base and CSAPR control scenario. (Excel 354 KB)
- Contributions of 8-hour ozone, annual PM2.5, and 24-hour PM2.5 from each state to each monitoring site. (Excel 1.38 MB)
- Acid Rain NOx Averaging Plans Final Rule TSD (PDF 4 pp, 62 kb)
- Phase II NOx Averaging Plan 308 (PDF 25 pp, 19.5 MB)
- Phase II NOx Averaging Plan 390 (PDF 5 pp, 6.7 MB)
- Phase II NOx Averaging Plan 314 (PDF 8 pp, 6.9 MB)
Disclaimer: The official version of these documents will be in the docket when the rule is published in the Federal Register.
Proposed Revisions to the Cross-State Air Pollution Rule (CSAPR)
- Significant Contribution Assessment of Proposed Revisions TSD (PDF 28pp 552 KB)
- Consent Decree Limits on Allocations TSD (PDF 16pp 332 KB)
- Technical Revisions to State Budgets and New Unit Set-Asides TSD (PDF 50pp 839 KB)
- Allowance Recordation Schedule TSD (PDF 8pp 53 KB)
Disclaimer: The official version of these documents will be in the docket when the rule is published in the Federal Register.
Proposed Transport Rule
- Non-EGU Emissions Reductions Cost and Potential (PDF) (60 pp, 218 kb)
- Emissions Inventories (PDF) (75 pp, 554 kb)
- Preparation of Emissions Inventories for the Version 4, 2005-based Platform (PDF) (79 pp, 749 kb)
- Preparation of Emissions Inventories for the Version 4, 2005-based Platform - Appendices (PDF) (13 pp, 69 kb)
- Other Remedy Options Evaluated (PDF) (7 pp, 22 kb)
- Analysis of NOX Budget Trading Program Units Brought into the CAIR NOX Ozone Season Trading Program (PDF) (19 pp, 117 kb)
- Updates to EPA Base Case v3.02 EISA Using the Integrated Planning Model (PDF) (38 pp, 392 kb)
- Electric Generation Ownership, Market Concentration and Auction Size (PDF) (11 pp, 56 kb)
- Analysis of Constellation Energy Group’s Allocation Suggestion that Uses Title IV Allowances (PDF) (1 pg, 31 kb)
- Analysis to Quantify Significant Contribution (PDF) (114 pp, 1.4 MB)
- Analysis to Quantify Significant Contribution (Excel) (60 k) - Selected tables in Excel format
- Capacity Factors Analysis for New Units (PDF) (10 pp, 61 kb)
- Installation Timing for Low NOX Burners (LNB) (PDF) (3 pp, 15 kb)
- State Budgets, Unit Allocations, and Unit Emissions Rates (PDF) (16 pp, 71 kb)
- Allocation Table (PDF) (91 pp, 192 kb) - Note - Revised on 7/21/10 to correct calculation error in Ozone Season NOx Rates under the Direct Control Alternative (column R). The original calculation resulted in rates 50% lower than the revised rates - no other values are impacted.
- Allocation Table (Excel) (1.0 MB) - Note - Revised on 7/21/10 to correct calculation error in Ozone Season NOx Rates under the Direct Control Alternative (column R). The original calculation resulted in rates 50% lower than the revised rates - no other values are impacted.
- Budgets and Allocations - Data Field Descriptions (PDF) (12pp, 43k)
- Budgets and Allocations - Detailed Unit-Level Data (Excel) (27.8 MB)
- Air Quality Modeling (PDF) (331 pp, 4,702 kb)
- Air Quality Contributions Data File (Excel) (3.7 MB)
- Power Sector Variability (PDF) (56pp. 1.2 MB)
- Alternative Significant Contribution Approaches Evaluated (PDF) (15pp, 116k)
EPA analyzed the impact of the proposed Transport Rule on the U.S. electric power sector using the Integrated Planning Model (IPM). Modeling results and documentation can be downloaded from EPA's IPM website.