County annual report · FIPS 17087
2017 Johnson County, IL Power Outage Report
In 2017, customers in Johnson County, IL went without power for an average of 2.1 hours, a total of 14K customer-hours (Illinois average 1.4 hours). That ranks 23rd worst of 102 Illinois counties and 1591st of 2,786 nationally.
Compared with IL, the US and 2016
Coverage line is EAGLE-I's share of Illinois customers tracked each year.
Biggest outages in Johnson County, 2017
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 21, 2017 23:00 | August 22, 2017 00:15 | 1h 15m | 2,409 | 1,156 |
| 2 | December 23, 2017 05:00 | December 23, 2017 06:00 | 1h | 1,267 | 775 |
| 3 | November 6, 2017 03:00 | November 6, 2017 05:15 | 2h 15m | 1,266 | 1,499 |
| 4 | April 30, 2017 16:30 | May 1, 2017 06:30 | 14h | 1,195 | 1,927 |
| 5 | March 20, 2017 20:30 | March 20, 2017 22:15 | 1h 45m | 965 | 1,454 |
| 6 | May 27, 2017 18:45 | May 28, 2017 15:45 | 21h | 553 | 2,717 |
| 7 | May 5, 2017 17:00 | May 5, 2017 22:15 | 5h 15m | 293 | 1,082 |
| 8 | March 1, 2017 11:00 | March 1, 2017 23:15 | 12h 15m | 205 | 551 |
| 9 | December 1, 2017 15:00 | December 1, 2017 16:00 | 1h | 192 | 97 |
| 10 | December 1, 2017 18:30 | December 1, 2017 19:45 | 1h 15m | 188 | 188 |
Outage episodes by size in 2017: 14 reached 100+ customers, 4 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 2017, 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 |
|---|---|---|---|---|---|
| Ameren Illinois Company | 2017 | 3.2 hrs | 1.12 | 2.0 hrs | 0.90 |
| Southeastern IL Elec Coop, Inc | 2017 | 5.3 hrs | 2.21 | 2.2 hrs | 1.51 |
| Ameren | - | - | - | - | - |
| Egyptian Electric Coop Assn | - | - | - | - | - |
| Southern Illinois 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 Illinois's customers in 2017; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 6,500 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, IL annual power outage report, 2017, 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/2017/illinois/johnson-county