County annual report · FIPS 19061
2023 Dubuque County, IA Power Outage Report
In 2023, customers in Dubuque County, IA went without power for an average of 1.7 hours, a total of 81K customer-hours (Iowa average 2.0 hours). That ranks 49th worst of 99 Iowa counties and 2393rd of 2,977 nationally.
Compared with IA, the US and 2022
Coverage line is EAGLE-I's share of Iowa customers tracked each year.
Biggest outages in Dubuque County, 2023
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | March 31, 2023 22:45 | April 2, 2023 12:45 | 1d 14h | 4,721 | 16K |
| 2 | June 12, 2023 03:30 | June 12, 2023 14:15 | 10h 45m | 2,220 | 2,621 |
| 3 | July 8, 2023 04:30 | July 10, 2023 18:15 | 2d 13h | 1,938 | 4,054 |
| 4 | June 2, 2023 14:15 | June 5, 2023 00:00 | 2d 9h | 1,760 | 8,774 |
| 5 | June 11, 2023 13:45 | June 11, 2023 23:30 | 9h 45m | 1,709 | 1,306 |
| 6 | August 21, 2023 14:15 | August 22, 2023 19:00 | 1d 4h | 1,704 | 502 |
| 7 | January 19, 2023 09:45 | January 19, 2023 11:00 | 1h 15m | 1,510 | 1,723 |
| 8 | August 7, 2023 13:45 | August 7, 2023 16:00 | 2h 15m | 1,467 | 770 |
| 9 | May 27, 2023 15:30 | May 30, 2023 21:30 | 3d 6h | 1,415 | 7,597 |
| 10 | August 29, 2023 14:45 | August 29, 2023 15:15 | 30m | 1,335 | 668 |
Outage episodes by size in 2023: 36 reached 100+ customers, 11 reached 1,000+ customers, 0 reached 10,000+ customers.
Utility reliability filed with the EIA
SAIDI (average outage time per customer) and SAIFI (average interruptions per customer) that utilities serving Dubuque County reported on EIA Form 861 for 2023, or their most recent earlier filing. Utility-wide figures, not county-specific.
| Utility | EIA year | SAIDI | SAIFI | SAIDI excl. major events | SAIFI excl. major events |
|---|---|---|---|---|---|
| Maquoketa Valley Rrl Elec Coop | 2023 | 3.5 hrs | 1.36 | 57 min | 0.66 |
| Allamakee-Clayton El Coop, Inc | 2018 | 1.5 hrs | 0.73 | 1.5 hrs | 0.73 |
| Interstate Power and Light Co | - | - | - | - | - |
| Alliant Energy (Interstate Power & Light) | - | - | - | - | - |
| Cascade Municipal Utilities | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about n/a of Iowa's customers in 2023; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 46,546 customers (ORNL modeled county customer count), including major storm days. It is comparable across counties but is not the SAIDI a utility files.
- An outage event is a continuous stretch with customers out; counts at 100, 1,000 and 10,000+ use its peak.
- Years loaded: 2015–2025. Dubuque County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Dubuque County, IA annual power outage report, 2023, data as of Oct 3, 2026 02:41 UTC, sources: DOE EAGLE-I (https://eagle-i.doe.gov/); EAGLE-I modeled customer counts (MCC) (https://figshare.com/); EIA Form 861 (utility reliability) (https://www.eia.gov/electricity/data/eia861/). https://massoutage.com/reports/2023/iowa/dubuque-county