County annual report · FIPS 19121
2021 Madison County, IA Power Outage Report
In 2021, customers in Madison County, IA went without power for an average of 0.9 hours, a total of 8,060 customer-hours (Iowa average 2.7 hours). That ranks 91st worst of 99 Iowa counties and 2711th 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 Madison 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 | December 16, 2021 00:15 | December 17, 2021 02:15 | 1d 2h | 519 | 1,802 |
| 2 | November 19, 2021 17:45 | November 19, 2021 19:15 | 1h 30m | 477 | 441 |
| 3 | October 29, 2021 04:45 | October 29, 2021 07:45 | 3h | 443 | 915 |
| 4 | June 10, 2021 00:00 | June 10, 2021 02:15 | 2h 15m | 312 | 670 |
| 5 | March 10, 2021 20:45 | March 10, 2021 23:30 | 2h 45m | 282 | 438 |
| 6 | April 1, 2021 14:30 | April 1, 2021 17:30 | 3h | 194 | 56 |
| 7 | August 25, 2021 11:00 | August 25, 2021 12:15 | 1h 15m | 194 | 243 |
| 8 | April 1, 2021 02:30 | April 1, 2021 04:15 | 1h 45m | 193 | 338 |
| 9 | June 20, 2021 09:30 | June 20, 2021 09:45 | 15m | 120 | 30 |
| 10 | October 29, 2021 17:00 | October 29, 2021 18:30 | 1h 30m | 103 | 153 |
Outage episodes by size in 2021: 10 reached 100+ customers, 0 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 Madison 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 |
|---|---|---|---|---|---|
| MidAmerican Energy Co | 2021 | 1.9 hrs | 1.04 | 75 min | 0.74 |
| Farmers Electric Coop, Inc - (IA) | 2018 | 5.9 hrs | 1.44 | 2.1 hrs | 1.26 |
| Interstate Power and Light Co | - | - | - | - | - |
| Waverly Municipal Elec Utility | - | - | - | - | - |
| Clarke Electric Coop Inc - (IA) | - | - | - | - | - |
| City of Winterset - (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 ÷ 9,366 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. Madison County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Madison 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/madison-county