Tennessee Valley Authority

There have been no material changes to the environmental matters described in Part I, Item 1, Business —Environmental Matters of the Annual Report, except as described below.

Water Quality Control Developments

Steam-Electric Effluent Guidelines. On January 8, 2021, TVA submitted requests to state regulatory authorities to modify National Pollutant Discharge Elimination System permits for Kingston Fossil Plant, Cumberland, Bull Run Fossil Plant, Shawnee Fossil Plant, and Gallatin to incorporate into the permits limitations in the Environmental Protection Agency's 2020 Effluent Limitation Guidelines rule. TDEC issued a final permit for Cumberland in the first quarter of 2024. See Part I, Item 1, Business —Environmental Matters —Water Quality Control Developments —Steam-Electric Effluent Guidelines in the Annual Report.

Cleanup of Solid and Hazardous Wastes

Coal Combustion Residuals. In August 2015, TDEC issued an order that includes an iterative process through which TVA and TDEC will identify and evaluate any CCR contamination risks and, if necessary, respond to such risks. As part of this process, TVA has submitted EARs to TDEC, and after the EARs are approved, TVA will submit CARA Plans that will identify the unacceptable risks and TVA's proposed remediation. TDEC approved the EARs for John Sevier Fossil Plant and Cumberland in the first quarter of 2024. TVA submitted the John Sevier CARA Plan to TDEC in the first quarter of 2024 and expects to submit the Cumberland CARA Plan during the second quarter of 2024. See Part I, Item 1, Business —Environmental Matters —Cleanup of Solid and Hazardous Wastes —Coal Combustion Residuals in the Annual Report.