SAIDI
45 min per year
Average outage minutes (2023)
City of Westerville - (OH) is a municipally-owned utility operating in Ohio under EIA identifier 20477. It reports service to approximately 17,942 customer accounts and generated about $0.05 billion in annual electric revenue, with a service footprint spanning 6 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 City of Westerville - (OH) customer experienced 44.6 minutes of power interruptions, a metric called SAIDI (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 0.52 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 17.5 minutes, and the spread against the headline 44.6 indicates how much weather, versus routine infrastructure, drove the outage total.
City of Westerville - (OH) has 4 years of continuous EIA reporting on file (2020–2023), enough to read a real trend rather than a single-year snapshot. SAIDI dropped from 123.2 to 44.6 minutes across that span, a direction regulators and prospective customers tend to watch closely.
SAIDI
45 min per year
Average outage minutes (2023)
SAIFI
0.52 interruptions/yr
Outage frequency (2023)
Customers
17,942
Ohio service territory
45 outage minutes per customer annually
Annual minutes without electric service (2023)
| Year | SAIDI (min) | SAIDI nMED | SAIFI | Customers |
|---|---|---|---|---|
| 2020 | 123.2 | 52.5 | 1.540 | 17,462 |
| 2021 | 49.4 | 32.6 | 0.640 | 17,772 |
| 2022 | 51.0 | 22.3 | 0.790 | 17,924 |
| 2023 | 44.6 | 17.5 | 0.520 | 17,950 |
SAIDI nMED = SAIDI without major event days. Source: EIA Form 861.
City of Westerville - (OH) serves 6 ZIP codes in Ohio.
City of Westerville - (OH) had a SAIDI of 44.6 minutes in 2023 including major weather events, but 17.5 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). Leaving aside major weather events, that figure comes in under the national average, pointing to above-average reliability.
City of Westerville - (OH) is classified as a Municipal serving Ohio.
City of Westerville - (OH) serves approximately 17,942 customers in Ohio.
City of Westerville - (OH) 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.
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.