Zones
Grid operator · polygon
Demand areas and market boundaries colored by how close each is to its own daily peak. Named load zones in NYISO, PJM, and ISO-NE; local resource zones in MISO; approximate TAC demand territories in CAISO; ancillary reserve zones in SPP.
Hourly actual and forecast frames
LimitIn CAISO the territories are approximate California Energy Commission reference geometry, not authoritative CAISO settlement boundaries. SPP publishes no load by reserve zone, so those zones carry no demand series.






