IOU · Wisconsin · EIA 11479
Madison Gas & Electric Co
IOU · Wisconsin · 163K customers. According to the U.S. Energy Information Administration's EIA Form 861, reliability for 2023 shows SAIDI 64 minutes/customer.
Reliability verdict
Madison Gas & Electric Co shows above-average chronic reliability in 2023: 24 minutes SAIDI excluding major events (64 minutes including them) across 163K customers.
- 64 min
- SAIDI 2023
- 0.28
- SAIFI 2023
- 24 min
- SAIDI ex-MED
- 163K
- Customers
Chronic reliability judged on SAIDI excluding major event days when reported (IEEE 1366). Source: EIA Form 861 · August 2026.
Signature read: short interruption minutes vs the 911 utility cohort (≤96 min tercile cut).
What short-outage Madison Gas & Electric Co filings show
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.
Based on this utility's own EIA Form 861 reliability record -- baseline (major-event- excluded) outage duration, total outage duration, and outage frequency -- each benchmarked against every reporting utility nationwide. Not a measure of electricity rates or customer service, which this portal does not track.
64 minutes per customer per year
Annual minutes without electric service (2023)
SAIDI by year (2020-2023)
Minutes per customer-year · EIA Form 861
Year-by-year SAIDI for Madison Gas & Electric Co from the same EIA filings as the table below. Lower is better; major-event years can spike the headline figure.
Madison Gas & Electric Co SAIDI trend
Madison Gas & Electric Co vs the nationwide SAIDI distribution
Where this utility's headline SAIDI sits among every EIA Form 861 utility with a reported figure
64 Among the lowest fewer outage minutes than 77% of 911 utilities
Utilities nationwide, banded by latest reported SAIDI (minutes)
Each bar is a band; taller bars hold more utilities. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source U.S. EIA Form 861 reliability filings · August 2026
Price vs. reliability
Where Madison Gas & Electric Co sits on price vs. reliability
Among the 781 U.S. utilities large enough to report both revenue per customer and a recent outage record, Madison Gas & Electric Co charges more per customer than 72% of them, and is more reliable (lower SAIDI) than 81% of them, placing it in the quadrant where it pays more and is more reliable. Revenue per customer and outage minutes are independent figures: paying more does not guarantee fewer outages.
Revenue per customer: $2,953/year · Latest SAIDI: 64.0 minutes/year.
SAIDI 2023 breakdown: 64.0 minutes
Reliability Trend (2020–2023)
| Year | SAIDI (min) | SAIDI nMED | SAIFI | Customers |
|---|---|---|---|---|
| 2020 | 27.3 | 22.4 | 0.240 | 157,900 |
| 2021 | 39.6 | 31.9 | 0.284 | 159,618 |
| 2022 | 110.3 | 22.3 | 0.390 | 160,997 |
| 2023 | 64.0 | 23.5 | 0.275 | 163,634 |
SAIDI nMED = SAIDI without major event days. Source: EIA Form 861.
Service Area
Madison Gas & Electric Co serves 49 ZIP codes in Wisconsin.
Frequently Asked Questions
How reliable is Madison Gas & Electric Co?
Madison Gas & Electric Co had a SAIDI of 64.0 minutes in 2023 including major weather events, but 23.5 minutes excluding them (the IEEE-standard measure of day-to-day reliability, the gap reflects a major storm that year, not chronic performance). Excluding major weather events, this is below the national average, indicating above-average reliability.
What type of utility is Madison Gas & Electric Co?
Madison Gas & Electric Co is classified as a IOU serving Wisconsin.
How many customers does Madison Gas & Electric Co serve?
Madison Gas & Electric Co serves approximately 162,729 customers in Wisconsin.
How has Madison Gas & Electric Co's reliability changed over time?
Madison Gas & Electric Co has 4 years of reliability data (2020-2023). This utility's SAIDI has stayed fairly flat over the period. Review the trend table above for year-by-year detail.
Utility Profile
- Type
- IOU
- State
- Wisconsin
- Customers
- 162,729
- Annual Revenue
- $0.48B
- EIA ID
- 11479
Explore
Utilities with similar EIA profiles
Two cross-state peer sets for Madison Gas & Electric Co. Same-state SAIDI neighbors stay in Read-with below; these neighborhoods are nearest other-state utilities with at least 10,000 reported customers.
Similar customer count
Nearest utilities by Form 861 customers (163K here), outside Wisconsin.
Similar chronic SAIDI
Nearest utilities by latest SAIDI minutes (64.0 here), outside Wisconsin, excluding the customer-peer set.
Source: U.S. Energy Information Administration Form 861 annual electric power industry survey · ZIP service territory: OpenEI. Disclaimer: informational only, not professional advice. See full disclaimer · methodology.