County annual report · FIPS 17135
2020 Montgomery County, IL Power Outage Report
In 2020, customers in Montgomery County, IL went without power for an average of 3.1 hours, a total of 32K customer-hours (Illinois average 5.9 hours). That ranks 55th worst of 102 Illinois counties and 1836th of 3,019 nationally.
Compared with IL, the US and 2019
Coverage line is EAGLE-I's share of Illinois customers tracked each year.
Biggest outages in Montgomery County, 2020
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | January 23, 2020 08:15 | January 23, 2020 11:00 | 2h 45m | 5,667 | 7,331 |
| 2 | June 23, 2020 01:30 | June 24, 2020 16:45 | 1d 15h | 1,606 | 3,467 |
| 3 | July 15, 2020 21:15 | July 17, 2020 22:15 | 2d 1h | 1,484 | 6,180 |
| 4 | November 25, 2020 21:45 | November 30, 2020 22:15 | 5d | 1,056 | 3,156 |
| 5 | July 29, 2020 23:00 | July 30, 2020 01:30 | 2h 30m | 548 | 571 |
| 6 | November 5, 2020 19:30 | November 5, 2020 21:45 | 2h 15m | 328 | 329 |
| 7 | December 2, 2020 14:45 | December 2, 2020 20:30 | 5h 45m | 218 | 1,016 |
| 8 | May 7, 2020 16:00 | May 7, 2020 20:30 | 4h 30m | 213 | 167 |
| 9 | April 22, 2020 14:45 | April 22, 2020 16:45 | 2h | 210 | 398 |
| 10 | May 7, 2020 14:00 | May 7, 2020 15:00 | 1h | 210 | 210 |
Outage episodes by size in 2020: 16 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 2020, 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 | 2020 | 3.7 hrs | 1.04 | 1.7 hrs | 0.82 |
| Southwestern Electric Coop Inc - (IL) | 2020 | 3.4 hrs | 1.51 | 3.1 hrs | 1.47 |
| 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 94% of Illinois's customers in 2020; 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, 2020, 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/2020/illinois/montgomery-county