County annual report · FIPS 19103
2016 Johnson County, IA Power Outage Report
In 2016, customers in Johnson County, IA went without power for an average of 1.5 hours, a total of 114K customer-hours (Iowa average 1.8 hours). That ranks 60th worst of 99 Iowa counties and 1557th of 2,391 nationally.
Compared with IA, the US and 2015
Coverage line is EAGLE-I's share of Iowa customers tracked each year.
Biggest outages in Johnson County, 2016
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | October 11, 2016 14:15 | October 11, 2016 20:15 | 6h | 12,594 | 9,435 |
| 2 | June 28, 2016 12:45 | June 28, 2016 15:15 | 2h 30m | 10,235 | 4,195 |
| 3 | July 6, 2016 07:45 | July 7, 2016 04:00 | 20h 15m | 6,879 | 24K |
| 4 | February 19, 2016 15:00 | February 20, 2016 01:45 | 10h 45m | 5,845 | 4,118 |
| 5 | October 12, 2016 12:00 | October 12, 2016 13:45 | 1h 45m | 3,101 | 2,881 |
| 6 | August 19, 2016 08:00 | August 19, 2016 10:45 | 2h 45m | 2,923 | 3,732 |
| 7 | June 22, 2016 07:15 | June 22, 2016 20:45 | 13h 30m | 2,602 | 10K |
| 8 | June 29, 2016 17:15 | June 29, 2016 18:30 | 1h 15m | 2,245 | 1,364 |
| 9 | June 20, 2016 11:45 | June 20, 2016 12:00 | 15m | 2,075 | 519 |
| 10 | July 17, 2016 11:00 | July 17, 2016 20:00 | 9h | 1,846 | 4,192 |
Outage episodes by size in 2016: 70 reached 100+ customers, 17 reached 1,000+ customers, 2 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 2016, 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 | 2016 | 3.6 hrs | 1.64 | 83 min | 0.90 |
| Eastern Iowa Light & Power Coop | 2016 | 1.9 hrs | 1.06 | 88 min | 0.92 |
| T I P Rural Electric Coop | 2016 | 1.6 hrs | 1.20 | 1.6 hrs | 1.20 |
| Linn County REC | 2016 | 1.7 hrs | 1.29 | 1.7 hrs | 1.29 |
| Farmers Electric Coop - (IA) | 2016 | 6 min | 0.05 | 6 min | 0.05 |
| 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 n/a of Iowa's customers in 2016; 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, 2016, 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/2016/iowa/johnson-county