SAIDI
11 min per year
Yearly outage minutes, on average (2023)
What This Utility Data Tells You
Oconomowoc Utilities is a municipally-owned utility operating in Wisconsin under EIA identifier 13963. It reports service to approximately 11,188 customer accounts and generated about $0.03 billion in annual electric revenue, with a service footprint spanning 1 ZIP code. Being municipally owned, the utility answers to a local board or city council rather than a state commission, and carries a federal income tax exemption.
In 2023, the average Oconomowoc Utilities customer experienced 11.0 minutes of power interruptions, a metric called SAIDI (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. The SAIFI figure, which tracks average outage events per customer, came in at 0.12 for the same period, meaning customers statistically saw about 0 distinct interruptions that year. Excluding major event days (hurricanes, ice storms), SAIDI drops to 0.0 minutes, the gap between that figure and the headline 11.0 reveals how much weather, not day-to-day infrastructure, drove outages.
With 4 consecutive years of EIA data (2020–2023), Oconomowoc Utilities's reliability record can be judged on trend rather than one isolated year. SAIDI has increased from 7.3 to 11.0 minutes, which may reflect either worsening weather exposure or delayed grid modernization.
SAIFI
0.12 interruptions/yr
Average interruption count (2023)
Customers
11,188
Wisconsin service territory
SAIDI vs. National Average (180 min) 2.8%
11 minutes per customer per year
Annual minutes without electric service (2023)
Reliability Trend (2020–2023)
| Year | SAIDI (min) | SAIDI nMED | SAIFI | Customers |
|---|---|---|---|---|
| 2020 | 7.3 | - | 0.057 | - |
| 2021 | 9.3 | 0.0 | 0.159 | - |
| 2022 | 6.4 | 0.0 | 0.216 | - |
| 2023 | 11.0 | 0.0 | 0.115 | - |
SAIDI nMED = SAIDI without major event days. Source: EIA Form 861.
Service Area
Oconomowoc Utilities serves 1 ZIP code in Wisconsin.
53066
Frequently Asked Questions
How reliable is Oconomowoc Utilities?
Oconomowoc Utilities had a SAIDI of 11.0 minutes in 2023 including major weather events, but 0.0 minutes excluding them (the IEEE-standard day-to-day reliability measure, the difference points to a major storm that year rather than an ongoing problem). Excluding major storm impacts, this beats the national average, a sign of above-average reliability.
What type of utility is Oconomowoc Utilities?
Oconomowoc Utilities is classified as a Municipal serving Wisconsin.
How many customers does Oconomowoc Utilities serve?
Oconomowoc Utilities serves approximately 11,188 customers in Wisconsin.
How has Oconomowoc Utilities's reliability changed over time?
Oconomowoc Utilities has 4 years of reliability data (2020-2023). SAIDI has remained relatively stable over this period. Review the trend table above for year-by-year detail.
Utility Profile
- Type
- Municipal
- State
- Wisconsin
- Customers
- 11,188
- Annual Revenue
- $0.03B
- EIA ID
- 13963
Explore
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.
Every figure on PlainUtility is rendered directly from the U.S. Energy Information Administration's Form 861 reliability data, no number is typed in by an editor. This utility's SAIDI/SAIFI figures are rendered directly from EIA Form 861 reliability files. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2020-2023.