Skip to main content
U.S. flag

An official website of the United States government

Here’s how you know

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

HTTPS

Secure .gov websites use HTTPS
A lock (LockA locked padlock) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

    • Environmental Topics
    • Air
    • Bed Bugs
    • Chemicals and Toxics
    • Climate Change
    • Emergency Response
    • Environmental Information by Location
    • Environmental Justice
    • Greener Living
    • Health
    • Land, Waste, and Cleanup
    • Lead
    • Mold
    • Pesticides
    • Radon
    • Science Topics
    • Water Topics
    • A-Z Topic Index
    • Laws & Regulations
    • By Business Sector
    • By Topic
    • Compliance
    • Enforcement
    • Guidance
    • Laws and Executive Orders
    • Regulations
    • Report a Violation
    • Environmental Violations
    • Fraud, Waste or Abuse
    • About EPA
    • EPA Administrator
    • Organization Chart
    • Staff Directory
    • Planning, Budget, and Results
    • Jobs and Internships
    • Headquarters Offices
    • Regional Offices
    • Lab and Research Centers
Related Topics:
  • Cross-State Air Pollution Rule
Contact Us

Date Change Affirmation Rules for the Cross-State Air Pollution Rule (CSAPR)

The timing of CSAPR's implementation was affected by a number of court actions. On December 30, 2011, CSAPR was stayed prior to implementation. On April 29, 2014, the U.S. Supreme Court issued an opinion reversing an August 21, 2012 D.C. Circuit decision that had vacated 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. On October 23, 2014, the D.C. Circuit granted EPA's request. Accordingly, CSAPR Phase 1 implementation began in 2015, with Phase 2 beginning in 2017.

February 26, 2016

EPA issued a ministerial action affirming changes to CSAPR that align the dates in CSAPR's rule text with its revised implementation schedule - 2015 Phase 1 implementation and 2017 Phase 2 implementation. This change was made in 2014 on an interim basis. This action makes no further changes to CSAPR.

  • Ministerial Action: Rulemaking to Affirm Interim Amendments to Dates in Federal Implementation Plans Addressing Interstate Transport of Ozone and Fine Particulate Matter Federal Register (81 FR 13275)

November 21, 2014

EPA issued two ministerial actions to align certain aspects of CSAPR with the revised court-ordered schedule.

Interim Final Rule

EPA issued a ministerial rule that aligns the dates in the CSAPR rule text with the revised court-ordered schedule, including 2015 Phase 1 implementation and 2017 Phase 2 implementation.

  • CSAPR Interim Final Rule Federal Register (79 FR 71663)

Notice of Data Availability

EPA issued a NODA, as required by CSAPR, that aligns the final CSAPR default allowance allocation years with the revised court-ordered schedule.

  • Notice of Data Availability Federal Register (79 FR 71674)
  • Unit Level Allocations Under the CSAPR FIPs After Tolling
  • Unit Level Allocations Under the CSAPR FIPs After Tolling- Underlying Data (xlsx) (5.41 MB)
Contact Us to ask a question, provide feedback, or report a problem.
Last updated on March 13, 2022
United States Environmental Protection Agency

Discover.

  • Accessibility Statement
  • Budget & Performance
  • Contracting
  • EPA www Web Snapshot
  • Grants
  • No FEAR Act Data
  • Plain Writing
  • Privacy
  • Privacy and Security Notice

Connect.

  • Data.gov
  • Inspector General
  • Jobs
  • Newsroom
  • Open Government
  • Regulations.gov
  • Subscribe
  • USA.gov
  • White House

Ask.

  • Contact EPA
  • EPA Disclaimers
  • Hotlines
  • FOIA Requests
  • Frequent Questions

Follow.