Uncompetitive Intertie Zone Assessment Completed
October 23, 2026
The IESO has completed its quarterly assessment of Uncompetitive Intertie Zone (UIZ) designations. There are no changes to these designations from the last quarter. To view all current UIZ designations, visit the Uncompetitive Intertie Zones web page.
The IESO evaluates intertie zones on a quarterly basis to ensure fair and transparent market competition. Some factors that may result in a zone being declared uncompetitive include lack of a market for imports or exports with open access to transmission, high transmission access fees, or regulatory barriers restricting trade. UIZs are used to apply after-the-fact settlement charges to market participants that unfairly benefit from intertie market conditions.