Air Plan Approval; Iowa; Revisions to Iowa Air Quality Regulations

Document 2026-14322 is a Final Rule published by the Environmental Protection Agency in the Federal Register on July 16, 2026, with an effective date of August 17, 2026. The Environmental Protection Agency (EPA) is taking final action to approve revisions to the Iowa State Implementation Plan (SIP) and the Operating Permit Program to incorporate recent changes to the Iowa Administrative Code (IAC). The revisions include removal of the Voluntary Operating Permit (VOP) Program language; removal of the Emission Reduction Program language; new and renumbered rules; replacement of duplicative language with references to state statute and federal regulations; updated definitions; consolidation of 14 chapters into 8 chapters; and minor clarifications to language and grammar. The EPA is also finalizing corrections to the erroneous incorporation of several rules into the Iowa SIP pursuant to the Clean Air Act (CAA). These revisions do not decrease the stringency of the SIP or have an adverse effect on air quality. The EPA's final approval of this rule revision is in accordance with the requirements of the CAA. View the original at https://www.federalregister.gov/documents/2026/07/16/2026-14322/air-plan-approval-iowa-revisions-to-iowa-air-quality-regulations.

No. Document 2026-14322 is not classified as economically significant under Executive Order 12866. Economically significant rules require OIRA review and are estimated to have impacts of $100 million or more per year.