County annual report · FIPS 17179
2025 Tazewell County, IL Power Outage Report
In 2025, customers in Tazewell County, IL went without power for an average of 1.9 hours, a total of 151K customer-hours (Illinois average 2.5 hours). That ranks 76th worst of 102 Illinois counties and 2462nd of 3,000 nationally.
Compared with IL, the US and 2024
Coverage line is EAGLE-I's share of Illinois customers tracked each year.
Biggest outages in Tazewell County, 2025
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | December 28, 2025 12:45 | December 30, 2025 00:15 | 1d 11h | 4,411 | 6,363 |
| 2 | May 1, 2025 18:15 | May 2, 2025 00:15 | 6h | 3,368 | 5,567 |
| 3 | March 14, 2025 20:30 | March 15, 2025 21:45 | 1d 1h | 1,958 | 12K |
| 4 | November 23, 2025 18:00 | November 24, 2025 13:00 | 19h | 1,943 | 8,041 |
| 5 | January 31, 2025 07:15 | February 1, 2025 09:15 | 1d 2h | 1,611 | 2,427 |
| 6 | October 1, 2025 12:30 | October 1, 2025 15:15 | 2h 45m | 1,539 | 1,405 |
| 7 | December 1, 2025 18:15 | December 1, 2025 18:30 | 15m | 1,532 | 383 |
| 8 | July 28, 2025 00:30 | July 28, 2025 08:30 | 8h | 1,484 | 1,674 |
| 9 | October 29, 2025 02:00 | October 29, 2025 20:15 | 18h 15m | 1,222 | 6,014 |
| 10 | December 13, 2025 19:15 | December 15, 2025 12:30 | 1d 17h | 1,216 | 14K |
Outage episodes by size in 2025: 78 reached 100+ customers, 13 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 Tazewell County reported on EIA Form 861 for 2025, 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 | 2024 | 3.7 hrs | 1.13 | 2.0 hrs | 0.91 |
| Corn Belt Energy Corporation | 2024 | 5.2 hrs | 5.21 | 2.5 hrs | 4.68 |
| Menard Electric Coop | 2024 | 2.8 hrs | 1.49 | 1.9 hrs | 1.27 |
| 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 2025; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 80,878 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. Tazewell County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Tazewell County, IL annual power outage report, 2025, 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/2025/illinois/tazewell-county