NATGAS PIPELINE CRITICAL NOTICE: Natural Gas Pipeline GAS QUALITY — NB MCGOWAN (LOC 50706)

( This is the verbatim text of a critical notification provided by the pipeline operator to its shippers. The information has not been independently verified by Reuters. This item may be followed by a news story depending on the severity of the incident's impact, if any, on operations. )) Company Name: Natural Gas Pipeline Notice Type Description: GAS QUALITY Posted Date: 10/13/2026 Effective Date: 10/13/2026 End Date: 10/31/2026 Posting Text: Gasquality Issue — Nborder/ngpl Mcgowan Grundy A gas quality issue has been reported at the receiptfrom NBORDER/NGPL McGowan Grundy (LOC 50706) located in Grundy County, Illinois(Segment 28 of Natural's Iowa-Illinois Receipt Zone). Therefore, effective forgas day Wednesday, October 14 2026, Timely Cycle, and continuing untilfurther notice, this receipt location will be shut-in until the gas quality issue has been resolved. No transport services will be available. Natural will continue to monitor this situation andwill provide any updates via its website. Please contact your Account Director or SchedulingRepresentative if you have any questions. More information is available at