County annual report · FIPS 19055
2021 Delaware County, IA Power Outage Report
In 2021, customers in Delaware County, IA went without power for an average of 3.6 hours, a total of 25K customer-hours (Iowa average 2.7 hours). That ranks 41st worst of 99 Iowa counties and 1665th 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 Delaware 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 24, 2021 20:45 | August 25, 2021 22:45 | 1d 2h | 2,014 | 12K |
| 2 | December 16, 2021 02:45 | December 17, 2021 03:00 | 1d | 819 | 2,867 |
| 3 | July 15, 2021 00:45 | July 15, 2021 20:15 | 19h 30m | 751 | 1,280 |
| 4 | January 15, 2021 15:15 | January 15, 2021 16:15 | 1h | 371 | 120 |
| 5 | January 30, 2021 22:00 | January 30, 2021 23:00 | 1h | 370 | 197 |
| 6 | January 31, 2021 00:30 | January 31, 2021 00:45 | 15m | 369 | 92 |
| 7 | February 2, 2021 11:30 | February 2, 2021 12:45 | 1h 15m | 343 | 429 |
| 8 | June 3, 2021 08:15 | June 3, 2021 10:45 | 2h 30m | 280 | 681 |
| 9 | August 11, 2021 21:45 | August 11, 2021 22:45 | 1h | 275 | 275 |
| 10 | May 1, 2021 18:15 | May 2, 2021 00:15 | 6h | 211 | 282 |
Outage episodes by size in 2021: 17 reached 100+ customers, 1 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 Delaware 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 |
|---|---|---|---|---|---|
| East-Central Iowa Rural Elec Coop | 2021 | 1.7 hrs | 1.30 | 88 min | 1.10 |
| 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) | - | - | - | - | - |
| City of Earlville - (IA) | - | - | - | - | - |
| City of Hopkinton - (IA) | - | - | - | - | - |
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 ÷ 7,035 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. Delaware County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Delaware 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/delaware-county