Air Plan Approval; Wisconsin; Source-Specific Air Quality Implementation Plan; Oak Creek Power Plant
Key claim: EPA proposes to approve alternative NOx emissions limits for Wisconsin’s Oak Creek Power Plant that allow compliance while reducing NOx over time without interfering with NAAQS under the Clean Air Act.
Abstract
(Proposed Rule · Environmental Protection Agency) The Environmental Protection Agency (EPA) is proposing to approve a revision to the State of Wisconsin’s State Implementation Plan (SIP) for the Oak Creek Power Plant located in Oak Creek, Wisconsin. The EPA is proposing to approve alternative nitrogen oxides (NOX) emissions limits for the Oak Creek facility. The alternative limits will allow the facility to operate in compliance with State and Federal regulations, and emit less NOX over time as compared to current limits. This proposed action will not interfere with the National Ambient Air Quality Standards (NAAQS) and meets all applicable requirements under the Clean Air Act (CAA).
Why this matters
Source-specific SIP revisions like the Oak Creek NOx alternative limit illustrate how EPA tailors Clean Air Act compliance to individual EGUs while preserving NAAQS integrity, giving utilities flexibility on compliance pathways and timing. These facility-level actions accumulate into the practical emissions trajectory of the coal fleet and shape ozone- and PM-relevant NOx loading in the Upper Midwest.