LEGAL NOTICE OF FILINGS
NOTICE OF 30-DAY FILING
On or about September 10, 2025, Northern Indiana Public Service Company LLC (“NIPSCO”) will submit to the Indiana Utility Regulatory Commission for approval under its 30-Day Filing procedures, 170 IAC 1-6-1, et seq., revisions to its Rule 18 – Gas Quality Standards to reflect NIPSCO’s current gas standards in NIPSCO’s IURC Gas Service Tariff, Original Volume No. 10. NIPSCO’s gas quality standards are applicable to all supplies of gas delivered to NIPSCO’s pipeline system for transportation, including supplies of renewable natural gas (“RNG”). The proposed revisions generally fall into three categories. The first category includes proposals that should encourage and facilitate the development of RNG by relaxing or eliminating certain standards, based on evolving science or actual operating experience. The second category consists of clarifications of certain provisions of the rule to avoid confusion concerning their interpretation and application. The final category consists of changes to the existing standards concerning siloxanes and gas temperatures. These changes are needed to prevent harm to the Company’s pipeline system and the gas-burning equipment of its customers. A decision on the 30-Day Filing is anticipated at least thirty days after the September 10, 2025 filing date. Any objection to the filing should be directed to (a) the Secretary of the Indiana Utility Regulatory Commission, PNC Center, 101 West Washington Street, Suite 1500 East, Indianapolis, IN 46204 or (b) the Indiana Office of Utility Consumer Counselor, PNC Center, 115 West Washington Street, Suite 1500 South, Indianapolis, IN 46204.