List of Preliminary Potential Constrained Areas Available on IESO Site
August 28, 2025
The IESO has completed a preliminary analysis of the Potential Constrained Areas (PCAs), based on historical constraint data observed after the first three months of the renewed market launch.
These provisional PCAs have been made publicly available online to provide transparency to market participants and in accordance with the renewed market.
Official PCA designations will be made later this year.