County annual report · FIPS 17119
2023 Madison County, IL Power Outage Report
In 2023, customers in Madison County, IL went without power for an average of 9.2 hours, a total of 987K customer-hours (Illinois average 4.0 hours). That ranks 33rd worst of 102 Illinois counties and 910th 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 Madison 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 | July 1, 2023 00:15 | July 10, 2023 11:45 | 9d 11h | 18,539 | 566K |
| 2 | July 29, 2023 17:15 | July 31, 2023 23:45 | 2d 6h | 14,623 | 107K |
| 3 | March 31, 2023 02:15 | April 6, 2023 08:15 | 6d 6h | 6,555 | 56K |
| 4 | February 9, 2023 11:45 | February 9, 2023 22:00 | 10h 15m | 5,994 | 7,844 |
| 5 | February 13, 2023 09:15 | February 13, 2023 13:45 | 4h 30m | 4,899 | 12K |
| 6 | November 15, 2023 14:15 | November 16, 2023 08:30 | 18h 15m | 4,773 | 5,390 |
| 7 | July 14, 2023 13:00 | July 19, 2023 05:30 | 4d 16h | 3,641 | 49K |
| 8 | March 28, 2023 09:45 | March 29, 2023 02:00 | 16h 15m | 3,401 | 2,842 |
| 9 | May 29, 2023 13:00 | June 1, 2023 16:15 | 3d 3h | 3,399 | 11K |
| 10 | October 23, 2023 13:30 | October 23, 2023 16:45 | 3h 15m | 2,869 | 4,545 |
Outage episodes by size in 2023: 92 reached 100+ customers, 25 reached 1,000+ customers, 2 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 Madison 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 |
| Southwestern Electric Coop Inc - (IL) | 2023 | 6.2 hrs | 2.74 | 4.3 hrs | 2.22 |
| Ameren | - | - | - | - | - |
| M J M Electric Cooperative Inc | - | - | - | - | - |
| Clinton County Elec Coop, Inc | - | - | - | - | - |
| City of Highland | - | - | - | - | - |
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 ÷ 107,855 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. Madison County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Madison 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/madison-county