EPA Technical Support Document for Texas NOx RACT

The Environmental Protection Agency (EPA) has published a Technical Support Document (TSD) concerning Texas's implementation of Reasonably Available Control Technology (RACT) for Nitrogen Oxides (NOx) emissions. This document, dated March 2026, provides the technical basis and analysis underpinning the state's regulatory approach to controlling NOx emissions, likely in support of State Implementation Plans (SIPs) or related air quality management efforts.

This TSD is primarily for informational and technical reference. While it is a final document, it does not impose new direct compliance obligations on regulated entities. Companies operating in Texas that are subject to NOx emission limits should review this document to understand the EPA's technical rationale and the specific control measures considered for RACT. No immediate actions are required by this TSD, but it may inform future compliance strategies or enforcement interpretations related to NOx emissions.