County annual report · FIPS 19061
2025 Dubuque County, IA Power Outage Report
In 2025, customers in Dubuque County, IA went without power for an average of 1.6 hours, a total of 73K customer-hours (Iowa average 2.9 hours). That ranks 88th worst of 99 Iowa counties and 2587th of 3,000 nationally.
Compared with IA, the US and 2024
Coverage line is EAGLE-I's share of Iowa customers tracked each year.
Biggest outages in Dubuque County, 2025
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | August 9, 2025 21:00 | August 11, 2025 12:30 | 1d 15h | 2,634 | 11K |
| 2 | July 11, 2025 17:00 | July 13, 2025 21:00 | 2d 4h | 2,347 | 7,635 |
| 3 | March 31, 2025 15:45 | April 17, 2025 15:00 | 16d 23h | 2,229 | 6,663 |
| 4 | November 26, 2025 07:45 | November 26, 2025 11:30 | 3h 45m | 2,209 | 6,074 |
| 5 | December 21, 2025 14:15 | December 21, 2025 21:00 | 6h 45m | 1,834 | 1,924 |
| 6 | October 14, 2025 13:15 | October 14, 2025 22:45 | 9h 30m | 1,793 | 465 |
| 7 | June 29, 2025 04:00 | June 30, 2025 13:00 | 1d 9h | 1,532 | 1,546 |
| 8 | March 15, 2025 03:00 | March 17, 2025 13:15 | 2d 10h | 1,521 | 1,614 |
| 9 | May 15, 2025 23:30 | May 16, 2025 12:45 | 13h 15m | 1,516 | 2,471 |
| 10 | June 20, 2025 15:30 | June 20, 2025 21:45 | 6h 15m | 1,490 | 1,588 |
Outage episodes by size in 2025: 44 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 2025, 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 | 2024 | 2.2 hrs | 1.20 | 71 min | 0.82 |
| 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 2025; 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, 2025, 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/2025/iowa/dubuque-county