How hard the state’s grid is working right now — hourly demand on APS, SRP and Tucson Electric from federal grid data, each against its record.
| Utility | Now (MW) | Today’s peak | Record peak | Set | % of record |
|---|---|---|---|---|---|
| APSArizona Public Service | 5,345 | — | 9,437 | Sep 9, 2026 | — |
| SRPSalt River Project | 4,509 | — | 8,987 | Jul 25, 2026 | — |
| TEPTucson Electric Power | 1,724 | — | 4,147 | Jul 12, 2020 | — |
Source: the U.S. Energy Information Administration’s Hourly Electric Grid Monitor (demand by balancing authority; federal tracking began July 2015, so “record” means since then). Hours are Phoenix time; the feed runs one to three hours behind the clock.