EIA Form 861 · 2023 filing
US electric utility reliability statistics
A reproducible national snapshot of reported outage duration and frequency. These are historical filing aggregates, not a prediction or advice about a specific utility.
Answer first
The 2023 EIA filing covers 897 reporting utilities; their customer-weighted national SAIDI is 341.0 minutes, while ownership-type averages show materially different duration and frequency profiles.
- 897
- Reporting utilities
- 341.0 min
- National SAIDI
- 2023
- Filing year
Use the utility and state pages for the applicable reporter; national aggregates are context, not a service-quality promise.
Key findings
Standalone, citable statements derived live from the linked EIA filing snapshot. Reuse with attribution under CC BY 4.0.
- 897electric utilities reported usable SAIDI reliability data in the 2023 EIA Form 861 snapshot, across 51 state and District of Columbia jurisdictions.
- 341.0 minis the customer-weighted national SAIDI in the 2023 filing: average annual interruption duration. It includes only utilities with a positive SAIDI and customer count; it is not a forecast for any household.
- 140,735,269reported customers supply the weight behind the national SAIDI calculation. A utility-average and a customer-weighted national figure answer different questions and should not be substituted for one another.
- 476.3 minis the unweighted mean SAIDI among 441 reporting cooperatives, compared with 374.0 for investor-owned utilities and 148.6 for municipals.
- 2.25is the mean annual SAIFI among reporting cooperatives in this filing. SAIFI counts interruption frequency; use it with SAIDI rather than treating outage duration alone as a complete reliability verdict.
- 67.5 minis municipal utilities' mean SAIDI after excluding major event days. The gap from the full 148.6-minute mean shows why storm treatment needs to be named when comparing reliability figures.
- 2961.3 minMaine has the highest unweighted reporter-average SAIDI among states with reporting data (3 utilities). This is a state reporter average, not a customer-weighted state or national rank.
Average outage duration by ownership type
Unweighted utility means among reporting filers. Lower SAIDI means fewer annual outage minutes; it does not predict an individual customer's experience.
Source: U.S. Energy Information Administration EIA Form 861 reliability filings · 2023
How to read this study
SAIDI is annual outage duration and SAIFI is annual interruption frequency. Major event days can change the full SAIDI materially, so this page identifies whether a figure includes them. The CSV contains state-level reporter aggregates from the same live database; see the methodology for source and refresh details.
Download the state-level CSV (CC BY 4.0).
According to the U.S. Energy Information Administration (EIA), electric utilities publish SAIDI and SAIFI reliability metrics in Form 861 annual filings. Every figure on PlainUtility is rebuilt from those federal tables; no number is typed in by an editor. Every finding is computed from the same EIA Form 861 reliability cohort used on PlainUtility pages. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2023.