SAIDI
71 min per year
Yearly outage minutes, on average (2023)
What This Utility Data Tells You
Manitowoc Public Utilities is a municipally-owned utility operating in Wisconsin under EIA identifier 11571. It reports service to approximately 18,499 customer accounts and generated about $0.04 billion in annual electric revenue, with a service footprint spanning 3 ZIP codes. Municipal ownership means a local board or city council typically oversees this utility, and it is exempt from federal income tax.
In 2023, the average Manitowoc Public Utilities customer experienced 70.9 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 0.65 for the same period, so customers statistically faced roughly 1 distinct interruption that year. Excluding major event days (hurricanes, ice storms), SAIDI drops to 7.3 minutes, the gap between that figure and the headline 70.9 reveals how much weather, not day-to-day infrastructure, drove outages.
The EIA dataset includes 4 years of continuous reporting (2020–2023) for Manitowoc Public Utilities, which lets you see whether reliability is trending up or down rather than judging from a single snapshot. SAIDI climbed from 32.9 to 70.9 minutes over that window, a shift that can point to worsening weather exposure or delayed grid modernization.
SAIFI
0.65 interruptions/yr
Events per customer (2023)
Customers
18,499
Wisconsin service territory
SAIDI vs. National Average (180 min) 17.7%
71 minutes per customer per year
Annual minutes without electric service (2023)
Reliability Trend (2020–2023)
| Year | SAIDI (min) | SAIDI nMED | SAIFI | Customers |
|---|---|---|---|---|
| 2020 | 32.9 | 5.5 | 0.429 | 17,957 |
| 2021 | 46.0 | 6.0 | 0.480 | 18,035 |
| 2022 | 28.0 | 5.0 | 0.430 | 18,236 |
| 2023 | 70.9 | 7.3 | 0.650 | 18,280 |
SAIDI nMED = SAIDI without major event days. Source: EIA Form 861.
Service Area
Manitowoc Public Utilities serves 3 ZIP codes in Wisconsin.
542205422154241
Frequently Asked Questions
How reliable is Manitowoc Public Utilities?
Manitowoc Public Utilities had a SAIDI of 70.9 minutes in 2023 including major weather events, but 7.3 minutes excluding them (the IEEE-standard measure of day-to-day reliability, the gap reflects a major storm that year, not chronic performance). Leaving aside major weather events, that figure comes in under the national average, pointing to above-average reliability.
What type of utility is Manitowoc Public Utilities?
Manitowoc Public Utilities is classified as a Municipal serving Wisconsin.
How many customers does Manitowoc Public Utilities serve?
Manitowoc Public Utilities serves approximately 18,499 customers in Wisconsin.
How has Manitowoc Public Utilities's reliability changed over time?
Manitowoc Public Utilities 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
- Municipal
- State
- Wisconsin
- Customers
- 18,499
- Annual Revenue
- $0.04B
- EIA ID
- 11571
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.