Federal Plan Requirements for Other Solid Waste Incineration Units That Commenced Construction on or Before August 31, 2020, and Have Not Been Modified or Reconstructed After August 29, 2025

The U.S. Environmental Protection Agency (EPA) is proposing a Federal plan to implement the revised emission guidelines for existing other solid waste incineration (OSWI) units. The EPA promulgated emission guidelines for existing OSWI units in 2005 and revised the emission guidelines on June 30, 2025. If a State or Tribe with existing OSWI units subject to the 2025 revised OSWI emission guidelines does not submit an approvable plan by June 30, 2027, the EPA will develop, implement, and enforce a Federal plan for existing OSWI units located in that State or area of Indian Country. This action proposes a Federal plan to implement the 2025 revised OSWI units emission guidelines for existing OSWI units located in States and on Tribal lands without effective State or Tribal plans by the effective date of this Federal plan.