PJM will be performing PJM.com system maintenance on Wednesday, September 23, 2026, from 5:00 p.m. to 9:00 p.m. EPT (1700-2100 hours).
During this maintenance window, PJM.com and its subsidiary sites may experience intermittent unavailability for approximately 30 minutes.
PJM is now offering high-resolution transmission maps that include PJM's transmission infrastructure from 69 kilovolt to 765 kilovolt facilities. These maps contain detailed inserts of Philadelphia/Jersey City Corridor, Chicago, Pittsburgh, Dayton/Columbus Metro, Cleveland, Norfolk, and Baltimore/DC Metro.
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