County annual report · FIPS 17131
2023 Mercer County, IL Power Outage Report
In 2023, customers in Mercer County, IL went without power for an average of 4.8 hours, a total of 43K customer-hours (Illinois average 4.0 hours). That ranks 51st worst of 102 Illinois counties and 1504th 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 Mercer 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 | September 25, 2023 00:00 | September 25, 2023 07:30 | 7h 30m | 1,842 | 3,611 |
| 2 | March 31, 2023 23:15 | April 2, 2023 19:15 | 1d 20h | 1,134 | 8,643 |
| 3 | November 12, 2023 16:30 | November 12, 2023 18:00 | 1h 30m | 905 | 967 |
| 4 | June 11, 2023 16:00 | June 11, 2023 21:15 | 5h 15m | 899 | 1,583 |
| 5 | February 16, 2023 16:30 | February 16, 2023 21:15 | 4h 45m | 895 | 1,990 |
| 6 | June 18, 2023 14:00 | June 18, 2023 20:45 | 6h 45m | 806 | 643 |
| 7 | May 30, 2023 13:30 | May 30, 2023 21:15 | 7h 45m | 766 | 1,907 |
| 8 | May 8, 2023 00:00 | May 9, 2023 17:45 | 1d 17h | 754 | 2,921 |
| 9 | April 15, 2023 19:30 | April 15, 2023 20:15 | 45m | 595 | 446 |
| 10 | May 19, 2023 07:15 | May 19, 2023 09:15 | 2h | 585 | 957 |
Outage episodes by size in 2023: 31 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 Mercer 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 |
| MidAmerican Energy Co | 2023 | 2.8 hrs | 1.13 | 78 min | 0.83 |
| Ameren | - | - | - | - | - |
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 ÷ 8,972 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. Mercer County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Mercer 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/mercer-county