County annual report · FIPS 17023
2023 Clark County, IL Power Outage Report
In 2023, customers in Clark County, IL went without power for an average of 22.2 hours, a total of 174K customer-hours (Illinois average 4.0 hours). That ranks 12th worst of 102 Illinois counties and 351st of 2,977 nationally.
Compared with IL, the US and 2022
Coverage line is EAGLE-I's share of Illinois customers tracked each year.
Biggest outages in Clark County, 2023
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | June 29, 2023 18:45 | July 4, 2023 17:00 | 4d 22h | 4,592 | 146K |
| 2 | April 1, 2023 02:15 | April 2, 2023 01:30 | 23h 15m | 1,572 | 9,731 |
| 3 | February 9, 2023 11:45 | February 9, 2023 13:15 | 1h 30m | 921 | 949 |
| 4 | October 20, 2023 20:15 | October 21, 2023 03:30 | 7h 15m | 876 | 1,769 |
| 5 | July 5, 2023 23:30 | July 6, 2023 01:00 | 1h 30m | 832 | 1,051 |
| 6 | May 1, 2023 10:00 | May 1, 2023 14:00 | 4h | 806 | 3,036 |
| 7 | April 5, 2023 11:15 | April 5, 2023 19:15 | 8h | 632 | 1,015 |
| 8 | March 3, 2023 17:30 | March 4, 2023 07:15 | 13h 45m | 419 | 739 |
| 9 | November 28, 2023 10:00 | November 28, 2023 11:15 | 1h 15m | 376 | 445 |
| 10 | July 29, 2023 07:00 | July 29, 2023 15:30 | 8h 30m | 343 | 727 |
Outage episodes by size in 2023: 24 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 2023, 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 | 2023 | 9.9 hrs | 1.33 | 1.9 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 n/a of Illinois's customers in 2023; 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, 2023, 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/2023/illinois/clark-county