PJM Interconnection Continues Maximum Generation And Load Management Alerts For July 25

On July 24, the PJM Interconnection continued its Maximum Generation Alert and Load Management Alert into July 25 across its footprint to ensure the reliable delivery of electricity for customers in 13 states, including Pennsylvania, and the District of Columbia. 

This alert does not require any action from customers.

PJM expanded its Hot Weather Alert to its entire service area on July 24 ahead of expected hot weather.  A Hot Weather Alert for PJM’s western region was in place on July 23.

PJM is issuing the Maximum Generation Alert mainly to notify neighboring systems that electricity exports from PJM may be curtailed on July 25. The alert serves as a procedural step that allows those neighboring regions affected to plan accordingly.

The alert is also targeted at transmission/generation owners, who then determine if any maintenance or testing on equipment can be deferred or canceled. By deferring maintenance, the units stay online and continue to produce energy that is needed.

PJM issues this alert at the same time as a Load Management Alert, which gives advance notification that load management action may be declared, including non-Emergency and Emergency Demand Response. Demand Response programs pay customers in advance who sign up to allow reduction of their electricity use in emergencies.

A Hot Weather Alert is a routine procedure PJM issues ahead of forecasted 90-plus-degree weather and/or high humidity to prepare transmission and generation personnel and facilities for expected increases in electricity demand, or load.

As of noon on July 24, PJM expects to serve a peak load of over 151,000 MW on July 24 and a peak load of over 152,000 MW on July 25.

PJM’s record summer peak is 165,563 MW, set in 2006. On June 24 this summer, PJM served a preliminary peak of over 162,000 MW, the third-highest peak load in its history.

PJM has approximately 179,200 MW of generation capacity this summer, as well as approximately 7,900 MW of contracted demand response. Demand response programs pay customers in advance to have their electricity use automatically reduced in times of system stress.

Click Here for the PJM July 24 announcement.

PJM previously issued Hot Weather Alerts between June 18 and 26-- and Maximum Generation Alerts between June 23 and 25-- and Hot Weather Alerts and Maximum Generation Alerts on July 15 and 16.

Visit the PJM Interconnection website for more information.  PJM manages the electric grid across 13 states-- including Pennsylvania-- and the District of Columbia.

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[Posted: July 24, 2025]  PA Environment Digest