SAIDI
62 min per year
Yearly outage minutes, on average (2023)
City of Brookings - (SD) is a municipally-owned utility operating in South Dakota under EIA identifier 2285. It reports service to approximately 11,954 customer accounts and generated about $0.03 billion in annual electric revenue, with a service footprint spanning 2 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 Brookings - (SD) customer experienced 61.8 minutes of power interruptions, a metric called SAIDI (System Average Interruption Duration Index). Excluding major weather events from that total, that places this utility well below the 120–180 minute national benchmark, signaling strong grid hardening and fast restoration practices. SAIFI, the average number of outage events per customer, was 1.16 for the same period, so customers statistically faced roughly 1 distinct interruption that year. Once major event days (hurricanes, ice storms) are excluded, SAIDI comes down to 9.0 minutes, and the spread against the headline 61.8 indicates how much weather, versus routine infrastructure, drove the outage total.
City of Brookings - (SD) has 3 years of continuous EIA reporting on file (2021–2023), enough to read a real trend rather than a single-year snapshot. Over that span, SAIDI rose from 4.1 to 61.8 minutes, possibly reflecting tougher weather years or grid upgrades that have not caught up yet.
SAIDI
62 min per year
Yearly outage minutes, on average (2023)
SAIFI
1.16 interruptions/yr
Events per customer (2023)
Customers
11,954
South Dakota service territory
62 minutes per customer per year
Power-out minutes per year (2023)
| Year | SAIDI (min) | SAIDI nMED | SAIFI | Customers |
|---|---|---|---|---|
| 2021 | 4.1 | 4.1 | 0.052 | 11,665 |
| 2022 | 1760.5 | 1760.5 | 1.081 | 11,693 |
| 2023 | 61.8 | 9.0 | 1.157 | 11,965 |
SAIDI nMED = SAIDI without major event days. Source: EIA Form 861.
City of Brookings - (SD) serves 2 ZIP codes in South Dakota.
City of Brookings - (SD) had a SAIDI of 61.8 minutes in 2023 including major weather events, but 9.0 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 weather events, this is below the national average, indicating above-average reliability.
City of Brookings - (SD) is classified as a Municipal serving South Dakota.
City of Brookings - (SD) serves approximately 11,954 customers in South Dakota.
City of Brookings - (SD) has 3 years of reliability data (2021-2023). SAIDI has remained relatively stable over this period. Review the trend table above for year-by-year detail.
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.