Madison Gas & Electric Co

What This Utility Data Tells You

Madison Gas & Electric Co is an investor-owned utility operating in Wisconsin under EIA identifier 11479. It reports service to approximately 162,729 customer accounts and generated about $0.48 billion in annual electric revenue, with a service footprint spanning 49 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 Madison Gas & Electric Co customer experienced 64.0 minutes of power interruptions, a measure known as SAIDI, or 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 0.28 for the same period, so customers statistically faced roughly 0 distinct interruptions that year. Strip out major event days (hurricanes, ice storms) and SAIDI falls to 23.5 minutes; the difference from the headline 64.0 shows how much of the outage total came from weather rather than everyday grid issues.

The EIA dataset includes 4 years of continuous reporting (2020–2023) for Madison Gas & Electric 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 27.3 to 64.0 minutes, possibly reflecting tougher weather years or grid upgrades that have not caught up yet.