SAIDI
47 min per year
Mean outage duration per year (2023)
What This Utility Data Tells You
City of Marshfield - (WI) is a municipally-owned utility operating in Wisconsin under EIA identifier 11740. It reports service to approximately 13,946 customer accounts and generated about $0.03 billion in annual electric revenue, with a service footprint spanning 9 ZIP codes. 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 City of Marshfield - (WI) customer experienced 47.3 minutes of power interruptions, a measure known as SAIDI, or System Average Interruption Duration Index. Excluding major weather events from that total, that keeps this utility below the typical 120–180 minute national benchmark, consistent with a well-hardened distribution system and fast restoration crews. SAIFI, the average number of outage events per customer, was 0.22 for the same period, so customers statistically faced roughly 0 distinct interruptions that year. Excluding major event days (hurricanes, ice storms), SAIDI drops to 12.7 minutes, the gap between that figure and the headline 47.3 reveals how much weather, not day-to-day infrastructure, drove outages.
The EIA dataset includes 4 years of continuous reporting (2020–2023) for City of Marshfield - (WI), which lets you see whether reliability is trending up or down rather than judging from a single snapshot. SAIDI has increased from 37.9 to 47.3 minutes, which may reflect either worsening weather exposure or delayed grid modernization.
SAIFI
0.22 interruptions/yr
Events per customer (2023)
Customers
13,946
Wisconsin service territory
SAIDI vs. National Average (180 min) 11.8%
47 outage minutes per customer annually
Power-out minutes per year (2023)
Reliability Trend (2020–2023)
| Year | SAIDI (min) | SAIDI nMED | SAIFI | Customers |
|---|---|---|---|---|
| 2020 | 37.9 | 13.2 | 0.557 | 13,699 |
| 2021 | 25.6 | 12.7 | 0.260 | 13,821 |
| 2022 | 50.4 | 10.8 | 0.223 | 13,908 |
| 2023 | 47.3 | 12.7 | 0.221 | 13,947 |
SAIDI nMED = SAIDI without major event days. Source: EIA Form 861.
Service Area
City of Marshfield - (WI) serves 9 ZIP codes in Wisconsin.
544045441054412544205444154449544725447954484
Frequently Asked Questions
How reliable is City of Marshfield - (WI)?
City of Marshfield - (WI) had a SAIDI of 47.3 minutes in 2023 including major weather events, but 12.7 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 City of Marshfield - (WI)?
City of Marshfield - (WI) is classified as a Municipal serving Wisconsin.
How many customers does City of Marshfield - (WI) serve?
City of Marshfield - (WI) serves approximately 13,946 customers in Wisconsin.
How has City of Marshfield - (WI)'s reliability changed over time?
City of Marshfield - (WI) 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
- 13,946
- Annual Revenue
- $0.03B
- EIA ID
- 11740
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.