County annual report · FIPS 17087
2020 Johnson County, IL Power Outage Report
In 2020, customers in Johnson County, IL went without power for an average of 2.0 hours, a total of 13K customer-hours (Illinois average 5.9 hours). That ranks 75th worst of 102 Illinois counties and 2273rd of 3,019 nationally.
Compared with IL, the US and 2019
Coverage line is EAGLE-I's share of Illinois customers tracked each year.
Biggest outages in Johnson County, 2020
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | March 19, 2020 11:15 | March 19, 2020 12:00 | 45m | 1,265 | 638 |
| 2 | June 6, 2020 22:30 | June 7, 2020 04:00 | 5h 30m | 856 | 4,035 |
| 3 | December 14, 2020 07:15 | December 14, 2020 07:45 | 30m | 805 | 403 |
| 4 | May 25, 2020 23:00 | May 26, 2020 03:00 | 4h | 542 | 683 |
| 5 | December 4, 2020 07:15 | December 4, 2020 07:45 | 30m | 302 | 151 |
| 6 | June 10, 2020 14:00 | June 10, 2020 20:45 | 6h 45m | 287 | 524 |
| 7 | July 16, 2020 03:30 | July 16, 2020 10:30 | 7h | 243 | 1,507 |
| 8 | April 8, 2020 15:00 | April 8, 2020 16:00 | 1h | 203 | 53 |
| 9 | September 2, 2020 02:30 | September 2, 2020 04:30 | 2h | 141 | 189 |
| 10 | May 27, 2020 18:45 | May 27, 2020 19:30 | 45m | 118 | 89 |
Outage episodes by size in 2020: 13 reached 100+ customers, 1 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 2020, 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 | 2020 | 3.7 hrs | 1.04 | 1.7 hrs | 0.82 |
| Southeastern IL Elec Coop, Inc | 2020 | 2.8 hrs | 1.23 | 1.5 hrs | 0.99 |
| 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 94% of Illinois's customers in 2020; 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, 2020, 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/2020/illinois/johnson-county