County annual report · FIPS 19061
2021 Dubuque County, IA Power Outage Report
In 2021, customers in Dubuque County, IA went without power for an average of 1.0 hours, a total of 47K customer-hours (Iowa average 2.7 hours). That ranks 88th worst of 99 Iowa counties and 2661st of 2,974 nationally.
Compared with IA, the US and 2020
Coverage line is EAGLE-I's share of Iowa customers tracked each year.
Biggest outages in Dubuque County, 2021
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 10, 2021 21:00 | August 11, 2021 04:15 | 7h 15m | 3,277 | 6,502 |
| 2 | October 10, 2021 01:15 | October 10, 2021 03:00 | 1h 45m | 1,641 | 1,642 |
| 3 | October 13, 2021 14:00 | October 13, 2021 17:45 | 3h 45m | 1,640 | 1,137 |
| 4 | March 11, 2021 00:00 | March 11, 2021 01:15 | 1h 15m | 1,630 | 2,038 |
| 5 | December 16, 2021 03:30 | December 17, 2021 04:15 | 1d | 1,270 | 4,360 |
| 6 | November 25, 2021 02:45 | November 30, 2021 06:45 | 5d 4h | 1,058 | 1,265 |
| 7 | June 21, 2021 01:30 | June 21, 2021 10:45 | 9h 15m | 974 | 3,041 |
| 8 | November 6, 2021 13:45 | November 6, 2021 15:30 | 1h 45m | 914 | 1,599 |
| 9 | August 10, 2021 01:00 | August 10, 2021 17:15 | 16h 15m | 815 | 1,442 |
| 10 | August 22, 2021 14:00 | August 23, 2021 16:00 | 1d 2h | 773 | 640 |
Outage episodes by size in 2021: 43 reached 100+ customers, 6 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 2021, 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 | 2021 | 88 min | 0.93 | 56 min | 0.71 |
| 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 91% of Iowa's customers in 2021; 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, 2021, 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/2021/iowa/dubuque-county