County annual report · FIPS 19103
2019 Johnson County, IA Power Outage Report
In 2019, customers in Johnson County, IA went without power for an average of 1.7 hours, a total of 134K customer-hours (Iowa average 2.2 hours). That ranks 69th worst of 99 Iowa counties and 2174th of 2,945 nationally.
Compared with IA, the US and 2018
Coverage line is EAGLE-I's share of Iowa customers tracked each year.
Biggest outages in Johnson County, 2019
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | July 3, 2019 18:45 | July 3, 2019 23:45 | 5h | 6,942 | 3,514 |
| 2 | January 26, 2019 06:15 | January 26, 2019 08:30 | 2h 15m | 3,035 | 3,924 |
| 3 | August 20, 2019 10:00 | August 20, 2019 22:00 | 12h | 2,974 | 2,601 |
| 4 | October 25, 2019 19:45 | October 25, 2019 23:45 | 4h | 2,967 | 2,508 |
| 5 | January 7, 2019 23:15 | January 8, 2019 17:15 | 18h | 2,843 | 12K |
| 6 | September 8, 2019 12:30 | September 8, 2019 15:00 | 2h 30m | 2,636 | 3,021 |
| 7 | December 10, 2019 16:15 | December 11, 2019 13:30 | 21h 15m | 2,469 | 4,996 |
| 8 | September 13, 2019 00:45 | September 13, 2019 05:30 | 4h 45m | 2,257 | 1,298 |
| 9 | May 17, 2019 00:45 | May 18, 2019 09:30 | 1d 8h | 1,994 | 11K |
| 10 | December 30, 2019 14:15 | December 30, 2019 16:00 | 1h 45m | 1,901 | 1,621 |
Outage episodes by size in 2019: 99 reached 100+ customers, 18 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 Johnson County reported on EIA Form 861 for 2019, 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 | 2018 | 1.9 hrs | 1.18 | 75 min | 0.96 |
| Eastern Iowa Light & Power Coop | 2018 | 1.9 hrs | 0.92 | 1.7 hrs | 0.85 |
| T I P Rural Electric Coop | 2018 | 2.5 hrs | 1.33 | 2.5 hrs | 1.33 |
| Linn County REC | 2018 | 2.6 hrs | 1.13 | 2.6 hrs | 1.13 |
| Farmers Electric Coop - (IA) | 2018 | 77 min | 2.30 | 77 min | 2.30 |
| Interstate Power and Light Co | - | - | - | - | - |
| Alliant Energy (Interstate Power & Light) | - | - | - | - | - |
| East-Central Iowa Rural Elec 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 2019; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 77,769 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. Johnson County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Johnson County, IA annual power outage report, 2019, 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/2019/iowa/johnson-county