County annual report · FIPS 17135
2023 Montgomery County, IL Power Outage Report
In 2023, customers in Montgomery County, IL went without power for an average of 4.5 hours, a total of 46K customer-hours (Illinois average 4.0 hours). That ranks 55th worst of 102 Illinois counties and 1571st 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 Montgomery 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 18:00 | July 3, 2023 23:15 | 4d 5h | 3,844 | 8,947 |
| 2 | April 1, 2023 00:30 | April 3, 2023 03:45 | 2d 3h | 3,071 | 6,287 |
| 3 | July 26, 2023 00:00 | July 26, 2023 04:45 | 4h 45m | 2,105 | 3,843 |
| 4 | November 7, 2023 17:15 | November 7, 2023 19:15 | 2h | 1,075 | 1,916 |
| 5 | March 3, 2023 17:30 | March 4, 2023 20:15 | 1d 2h | 718 | 2,667 |
| 6 | February 22, 2023 19:45 | February 23, 2023 22:30 | 1d 2h | 709 | 2,712 |
| 7 | March 21, 2023 11:15 | March 21, 2023 11:45 | 30m | 566 | 148 |
| 8 | September 8, 2023 06:45 | September 8, 2023 10:45 | 4h | 546 | 1,773 |
| 9 | October 14, 2023 03:15 | October 14, 2023 10:00 | 6h 45m | 543 | 1,824 |
| 10 | September 28, 2023 16:15 | September 28, 2023 19:30 | 3h 15m | 528 | 791 |
Outage episodes by size in 2023: 25 reached 100+ customers, 4 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 Montgomery 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 |
| Rural Electric Conven Coop | 2018 | 4.0 hrs | 1.91 | 2.0 hrs | 1.84 |
| Ameren | - | - | - | - | - |
| Shelby Electric Coop, Inc | - | - | - | - | - |
| M J M Electric Cooperative Inc | - | - | - | - | - |
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 ÷ 10,344 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. Montgomery County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Montgomery 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/montgomery-county