County annual report · FIPS 17125
2024 Mason County, IL Power Outage Report
In 2024, customers in Mason County, IL went without power for an average of 5.0 hours, a total of 24K customer-hours (Illinois average 3.0 hours). That ranks 29th worst of 102 Illinois counties and 1612th of 2,990 nationally.
Compared with IL, the US and 2023
Coverage line is EAGLE-I's share of Illinois customers tracked each year.
Biggest outages in Mason County, 2024
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | July 16, 2024 01:45 | July 18, 2024 00:15 | 1d 22h | 974 | 10K |
| 2 | December 19, 2024 05:15 | December 19, 2024 10:15 | 5h | 785 | 3,729 |
| 3 | June 25, 2024 00:45 | June 27, 2024 03:15 | 2d 2h | 467 | 1,837 |
| 4 | June 11, 2024 20:15 | June 11, 2024 22:15 | 2h | 429 | 638 |
| 5 | August 11, 2024 17:00 | August 11, 2024 18:30 | 1h 30m | 429 | 554 |
| 6 | November 1, 2024 14:45 | November 1, 2024 15:15 | 30m | 427 | 214 |
| 7 | June 20, 2024 12:30 | June 20, 2024 15:15 | 2h 45m | 383 | 794 |
| 8 | March 9, 2024 02:45 | March 9, 2024 09:45 | 7h | 302 | 737 |
| 9 | July 27, 2024 07:15 | July 27, 2024 10:00 | 2h 45m | 297 | 747 |
| 10 | September 9, 2024 08:30 | September 9, 2024 10:30 | 2h | 297 | 571 |
Outage episodes by size in 2024: 16 reached 100+ customers, 0 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 Mason County reported on EIA Form 861 for 2024, 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 |
| Menard Electric Coop | 2024 | 2.8 hrs | 1.49 | 1.9 hrs | 1.27 |
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 2024; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 4,847 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. Mason County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Mason County, IL annual power outage report, 2024, 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/2024/illinois/mason-county