County annual report · FIPS 17023
2020 Clark County, IL Power Outage Report
In 2020, customers in Clark County, IL went without power for an average of 4.6 hours, a total of 36K customer-hours (Illinois average 5.9 hours). That ranks 37th worst of 102 Illinois counties and 1466th 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 Clark 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 | April 9, 2020 00:15 | April 10, 2020 09:15 | 1d 9h | 2,376 | 16K |
| 2 | June 1, 2020 07:15 | June 1, 2020 09:30 | 2h 15m | 2,340 | 3,303 |
| 3 | July 29, 2020 11:30 | July 29, 2020 13:00 | 1h 30m | 804 | 894 |
| 4 | May 29, 2020 08:00 | May 29, 2020 09:00 | 1h | 803 | 462 |
| 5 | April 28, 2020 20:45 | April 29, 2020 02:15 | 5h 30m | 729 | 1,965 |
| 6 | June 9, 2020 20:15 | June 9, 2020 23:00 | 2h 45m | 423 | 596 |
| 7 | January 11, 2020 08:15 | January 11, 2020 14:00 | 5h 45m | 411 | 983 |
| 8 | July 22, 2020 00:15 | July 22, 2020 02:30 | 2h 15m | 394 | 599 |
| 9 | July 12, 2020 04:15 | July 12, 2020 13:30 | 9h 15m | 393 | 1,468 |
| 10 | January 18, 2020 20:15 | January 18, 2020 22:30 | 2h 15m | 378 | 731 |
Outage episodes by size in 2020: 23 reached 100+ customers, 2 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 Clark 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 |
| Ameren | - | - | - | - | - |
| Norris Electric Coop | - | - | - | - | - |
| Coles-Moultrie Electric Coop | - | - | - | - | - |
| Enerstar Power Corp | - | - | - | - | - |
| City of Casey - (IL) | - | - | - | - | - |
| City of Marshall - (IL) | - | - | - | - | - |
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 ÷ 7,829 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. Clark County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Clark 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/clark-county