IESO Voltage Reduction Test Scheduled for July 23, 2026

Windsor, ON: The Independent Electricity System Operator (IESO) will conduct a routine voltage reduction test on Thursday, July 23, 2026, as part of mandatory testing of emergency operating measures used to support the reliability of Ontario’s electricity system.

The test will take place during two scheduled periods: a 3% voltage reduction from 9:00 a.m. to 10:00 a.m., followed by a 5% voltage reduction from 1:00 p.m. to 2:00 p.m.

Customers should not notice any impact on their electrical service during the test, and no action is required. Customers can continue using electricity as they normally would.

Routine testing helps ensure emergency procedures remain effective and supports the ongoing reliability and stability of Ontario's power grid. 

For additional information about Ontario’s electricity system and voltage reduction testing, please visit the IESO website: https://www.ieso.ca/Sector-Participants/System-Reliability/Voltage-Reductions.

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About ENWIN:

ENWIN Utilities Ltd. (ENWIN) is the licensed electricity distribution company serving customers in the City of Windsor. ENWIN is responsible for the local distribution of electricity and the operation, maintenance, and expansion of Windsor’s electricity distribution infrastructure. The company is committed to providing safe, reliable, and efficient service while supporting the growth and sustainability of the communities it serves.