County annual report · FIPS 17135
2015 Montgomery County, IL Power Outage Report
In 2015, customers in Montgomery County, IL went without power for an average of 0.9 hours, a total of 9,487 customer-hours (Illinois average 2.3 hours). That ranks 81st worst of 100 Illinois counties and 1815th of 2,484 nationally.
Compared with IL, the US
Coverage line is EAGLE-I's share of Illinois customers tracked each year.
Biggest outages in Montgomery County, 2015
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | May 22, 2015 20:15 | May 22, 2015 21:15 | 1h | 1,541 | 774 |
| 2 | November 21, 2015 18:15 | November 21, 2015 21:00 | 2h 45m | 1,502 | 3,268 |
| 3 | July 14, 2015 01:15 | July 14, 2015 13:30 | 12h 15m | 405 | 974 |
| 4 | November 12, 2015 00:00 | November 12, 2015 05:30 | 5h 30m | 371 | 583 |
| 5 | August 13, 2015 21:00 | August 13, 2015 22:45 | 1h 45m | 196 | 343 |
| 6 | April 29, 2015 20:45 | April 29, 2015 21:15 | 30m | 184 | 92 |
| 7 | July 16, 2015 02:45 | July 16, 2015 11:00 | 8h 15m | 177 | 746 |
| 8 | June 21, 2015 02:15 | June 21, 2015 14:30 | 12h 15m | 105 | 415 |
| 9 | May 8, 2015 20:00 | May 8, 2015 22:30 | 2h 30m | 103 | 242 |
| 10 | December 11, 2015 11:15 | December 11, 2015 14:15 | 3h | 84 | 165 |
Outage episodes by size in 2015: 9 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 Montgomery County reported on EIA Form 861 for 2015, 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 | 2015 | 5.9 hrs | 1.39 | 2.2 hrs | 1.04 |
| Southwestern Electric Coop Inc - (IL) | 2015 | 2.7 hrs | 1.63 | 2.4 hrs | 1.50 |
| Rural Electric Conven Coop | 2015 | 90 min | 0.79 | 90 min | 0.79 |
| 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 2015; 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, 2015, 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/2015/illinois/montgomery-county