The EIA breaks this article into the 3 interconnections: Eastern, Western, and Texas.
Quote: “”On July 27, 2023, peak hourly electricity demand in the continental United States reached 741,815 megawatt-hours (MWh). This peak was the second highest since we began collecting this data in 2016, just under the all-time high of 742,704 MWh recorded on July 20, 2022.””
https://cleantechnica.us2.list-manage.com/track/click?u=a897522b53d0853c85abbf9fa&id=140e95404a&e=c6b9c8d3c3