County annual report · FIPS 19101
2018 Jefferson County, IA Power Outage Report
In 2018, customers in Jefferson County, IA went without power for an average of 6.2 hours, a total of 42K customer-hours (Iowa average 2.2 hours). That ranks 13th worst of 99 Iowa counties and 892nd of 2,798 nationally.
Compared with IA, the US and 2017
Coverage line is EAGLE-I's share of Iowa customers tracked each year.
Biggest outages in Jefferson County, 2018
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | May 13, 2018 12:00 | May 13, 2018 16:00 | 4h | 2,899 | 4,471 |
| 2 | June 2, 2018 14:30 | June 2, 2018 21:45 | 7h 15m | 2,686 | 4,395 |
| 3 | September 28, 2018 14:45 | September 28, 2018 15:45 | 1h | 2,477 | 726 |
| 4 | March 24, 2018 09:45 | March 24, 2018 19:00 | 9h 15m | 2,039 | 9,401 |
| 5 | June 28, 2018 19:30 | June 29, 2018 01:30 | 6h | 1,664 | 2,089 |
| 6 | May 2, 2018 16:45 | May 2, 2018 22:45 | 6h | 1,528 | 1,915 |
| 7 | September 4, 2018 14:30 | September 4, 2018 17:00 | 2h 30m | 1,344 | 1,010 |
| 8 | June 19, 2018 19:30 | June 19, 2018 20:00 | 30m | 1,163 | 581 |
| 9 | August 29, 2018 00:15 | August 29, 2018 10:00 | 9h 45m | 881 | 3,524 |
| 10 | September 2, 2018 01:45 | September 2, 2018 11:45 | 10h | 779 | 1,016 |
Outage episodes by size in 2018: 23 reached 100+ customers, 8 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 Jefferson County reported on EIA Form 861 for 2018, 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 |
|---|---|---|---|---|---|
| T I P Rural Electric Coop | 2018 | 2.5 hrs | 1.33 | 2.5 hrs | 1.33 |
| Interstate Power and Light Co | - | - | - | - | - |
| Alliant Energy (Interstate Power & Light) | - | - | - | - | - |
| Access Energy Coop | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 89% of Iowa's customers in 2018; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 6,879 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. Jefferson County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Jefferson County, IA annual power outage report, 2018, 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/2018/iowa/jefferson-county