Cross-State Air Pollution Rule (CSAPR)
Resources for Implementation
On April 29, 2014, the U.S. Supreme Court issued an opinion reversing a D.C. Circuit decision that had vacated the Cross-State Air Pollution Rule (CSAPR). Following the remand of the case to the D.C. Circuit, EPA requested that the court lift the CSAPR stay and toll the CSAPR compliance deadlines by three years, to allow implementation of Phase 1 for 2015 and Phase 2 for 2017. On October 23, 2014, the D.C. Circuit granted EPA's request. CSAPR Phase I implementation is now scheduled for 2015, with Phase 2 beginning in 2017. This webpage will be updated accordingly.
The Cross-State Air Pollution Rule (CSAPR) requires states to significantly improve air quality by reducing power plant emissions that cross state lines and contribute to ozone and fine particle pollution in other states. In a separate, but related, regulatory action, EPA finalized a supplemental rulemaking on December 15, 2011 to require five states - Iowa, Michigan, Missouri, Oklahoma, and Wisconsin - to make summertime NOX reductions under the CSAPR ozone season control program. CSAPR requires a total of 28 states to reduce annual SO2 emissions, annual NOX emissions and/or ozone season NOX emissions to assist in attaining clean air standards. To speed implementation, EPA is adopting Federal Implementation Plans, or FIPs, for each of the states covered by this rule. EPA is encouraging states to submit State Implementation Plans (SIPs).
- CSAPR Implementation letter to Designated Representatives (PDF 17pp) Updated November 21, 2014
- Tools for States and Regions on the Clean Air Markets Division's (CAMD) Website
- Emissions Monitoring Requirements under the Transport Rule Trading Programs (PDF 17pp)
- 2013 SIP Notification Letter Format (Word 1pp 25 KB)
- CSAPR 2013 Allocations Template (Excel 18 KB) | Instructions (Word 2pp 37 KB)
- Allowance Allocations, Unit Level Allocations and Supplemental Rule Allocations
- Recordation of TR allowances and removal of CAIR allowances (PDF 2pp)
- Webinar - September 22, 2011
- Webinar - September 15, 2011
- State's 2013 Allowance Allocations (PDF 9pp)
- Cross-State Air Pollution Rule Implementation Overview Presentation (PDF 65pp) August 16, 2011
CSAPR 2012 and 2013 Allowance Allocation
On October 18, 2011, EPA placed 2012 allowances for all four CSAPR programs into accounts for sources with a certified account Designated Representative (DR). On October 25, 2011, EPA placed the 2013 control period allowances in accounts of sources in states which have not indicated that they will be determining 2013 allowance allocations. As of the October 17, 2011 deadline, twelve states notified EPA that they intended to distribute 2013 CSAPR allowances to sources in their states: Alabama, Florida, Kansas, Maryland, Mississippi, Missouri, Louisiana, Nebraska, New York, Ohio, Pennsylvania, and South Carolina. To see the level of allowances placed in specific accounts, please consult Air Markets Program Data (AMPD). For a summary of allowances available for recordation at the state level, see this spreadsheet (Excel 30 KB).(PDF 276pp)
States that are included in the Cross-State Air Pollution Rule (CSAPR)
|State||Required to Reduce Emissions of NOX during the Ozone Season (1997 Ozone NAAQS)||Required to Reduce Annual Emissions of SO2 and NOX (1997 Annual PM2.5 NAAQS)||Required to Reduce Annual Emissions of SO2 and NOX (2006 24-Hour PM2.5 NAAQS)||*SO2 Group|
|Number of States||25||18||21|
* The final CSAPR divides the states required to reduce SO2 into two groups. Both groups must reduce their SO2 emissions beginning in Phase I. Group 1 states must make significant additional reductions in SO2 emissions for Phase II in order to eliminate their significant contribution to air quality problems in downwind areas.
Budgets, Variability Limits and State Assurance Levels
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.
These updated tables incorporate all adjustments finalized in the Supplemental Notice of Final Rulemaking (December 2011), the February Revisions Rule (February 7, 2012), and the June Revisions Rule (June 5, 2012).
Annual SO2 Budgets, Variability Limits and State Assurance Levels (PDF) (1p, 154 KB) | View this table in Excel (31 KB)
Annual NOX Budgets, Variability Limits and State Assurance Levels (PDF) (1p, 153 KB) | View this table in Excel (31 KB)
Changes in States' Requirements from CAIR to the CSAPR
In the CSAPR, some states have different requirements than they did under CAIR. This table shows those differences. This is not an all-inclusive list of states that are included in the CSAPR
|Requirements under the Clean Air Interstate Rule||Requirements under the Cross-State Air Pollution Rule|
|SO2||Annual NOX||Ozone Season NOX||SO2||Annual NOX||Ozone Season NOX|
|District of Columbia||Yes||Yes||Yes||No||No||No|