TSP Name: Northern Natural Gas Company TSP: 784158214 Notice ID: 093438 Notice Type: Rates and Charges Subject: ANNUAL CHARGE ADJUSTMENT - OCTOBER 1, 2025 Critical: N Post Date/Time: 08/01/2025 09:00 AM Notice Status: Initiate For Gas Day(s): 08/01/2025 - 09/30/2025 Notice Effective Date/Time: 08/01/2025 09:00 AM Notice End Date/Time: 10/01/2025 08:59 AM Required Response Indicator Description: 5-No response required Notice Text: Effective October 1, 2025, the Annual Charge Adjustment (ACA) unit surcharge assessed by the Federal Energy Regulatory Commission on gas transported by interstate pipelines during fiscal year 2026 will be $0.0015/Dth. The ACA surcharge is posted on the Federal Energy Regulatory Commission's website. If you have any questions, contact your customer service or marketing representative.