Tucson Electric Power Co

What This Utility Data Tells You

Tucson Electric Power Co is an investor-owned utility operating in Arizona under EIA identifier 24211. It reports service to approximately 449,674 customer accounts and generated about $1.18 billion in annual electric revenue, with a service footprint spanning 64 ZIP codes. As an investor-owned utility, it operates under state public utility commission oversight that reviews rate cases and reliability performance.

In 2023, the average Tucson Electric Power Co customer experienced 168.7 minutes of power interruptions, the industry-standard SAIDI metric (System Average Interruption Duration Index). Excluding major weather events from that total, that is comfortably under the 120–180 minute national benchmark range, a sign of solid grid resilience and quick outage response. SAIFI, the average number of outage events per customer, was 0.98 for the same period, so customers statistically faced roughly 1 distinct interruption that year. Excluding major event days (hurricanes, ice storms), SAIDI drops to 61.9 minutes, the gap between that figure and the headline 168.7 reveals how much weather, not day-to-day infrastructure, drove outages.

The EIA dataset includes 4 years of continuous reporting (2020–2023) for Tucson Electric Power Co, which lets you see whether reliability is trending up or down rather than judging from a single snapshot. Over that span, SAIDI rose from 60.0 to 168.7 minutes, possibly reflecting tougher weather years or grid upgrades that have not caught up yet.