Company: TVC
Filing Date: 2025-11-13
Form Type: 10-K
Source: 0001376986-25-000056
Chunk: 295

Company: Tennessee Valley Authority
Filing Date: 2025-11-13
Form: 10-K
Item: Item 1
Chunk 295
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2) Mercury and Air Toxics Standards, (3) steam electric effluent limitation guidelines, (4) National Ambient Air Quality Standards for particulate matter, (5) regulations regarding regional haze, (6) the Good Neighbor Plan, and (7) CCR regulations.  TVA cannot predict the outcome of such reevaluations or their impact on TVA's financial results or operations.  Liability for releases, natural resource damages, and required cleanup of hazardous substances is primarily regulated by the federal Comprehensive Environmental Response, Compensation, and Liability Act ("CERCLA"), the Resource Conservation and Recovery Act ("RCRA"), and other federal and parallel state statutes.  In a manner similar to many other governmental entities, industries, and power systems, TVA has generated or used hazardous substances over the years.  TVA operations at some facilities have resulted in releases of contaminants that TVA has addressed or is addressing consistent with state and federal requirements.  At September 30, 2025 and 2024, TVA's estimated liability for required cleanup and similar environmental work for those sites for which sufficient information is available to develop a cost estimate was $8 million and $15 million, respectively, on a non-discounted basis, and was included in Accounts payable and accrued liabilities and Other long-term liabilities on the Consolidated Balance Sheets.  Additionally, the potential inclusion of new hazardous substances under CERCLA and RCRA jurisdiction could significantly affect TVA's future liability for remediating historical releases.In August 2015, the Tennessee Department of Environment and Conservation ("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.  TVA is also following a similar process pursuant to a consent order.  At September 30, 2025 and 2024, TVA's estimated liability for costs associated with environmental remediation activities for the sites covered by these orders for which sufficient information is available to develop a cost estimate was approximately $319 million and $215 million, respectively, on a non-discounted basis and was included in Accounts payable and accrued liabilities and Other long-term liabilities on the Consolidated Balance Sheets.  The current estimated time frame for work related to these remediation activities for which TVA has a cost estimate is through 2044.

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Legal ProceedingsFrom time to time, TVA is party to or otherwise involved in lawsuits, claims, proceedings, investigations, and other