Slinger Utilities

Signature read: mid-cohort SAIDI between the 96 and 258 minute tercile cuts.

What mid-pack Slinger Utilities filings show

Slinger Utilities is a municipally-owned utility operating in Wisconsin under EIA identifier 17324. It reports service to approximately 2,968 customer accounts and generated about $0.01 billion in annual electric revenue, with a service footprint spanning 2 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 Slinger Utilities customer experienced 156.2 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 1.07 for the same period, so customers statistically faced roughly 1 distinct interruption that year. Strip out major event days (hurricanes, ice storms) and SAIDI falls to 0.0 minutes; the difference from the headline 156.2 shows how much of the outage total came from weather rather than everyday grid issues.

Slinger Utilities has 4 years of continuous EIA reporting on file (2020–2023), enough to read a real trend rather than a single-year snapshot. SAIDI climbed from 2.3 to 156.2 minutes over that window, a shift that can point to worsening weather exposure or delayed grid modernization.