County annual report · FIPS 29139
2021 Montgomery County, MO Power Outage Report
In 2021, customers in Montgomery County, MO went without power for an average of 5.1 hours, a total of 27K customer-hours (Missouri average 4.5 hours). That ranks 46th worst of 115 Missouri counties and 1315th of 2,974 nationally.
Compared with MO, the US and 2020
Coverage line is EAGLE-I's share of Missouri customers tracked each year.
Biggest outages in Montgomery County, 2021
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 25, 2021 03:00 | May 25, 2021 05:30 | 2h 30m | 1,061 | 1,658 |
| 2 | February 16, 2021 06:15 | February 16, 2021 11:15 | 5h | 996 | 2,807 |
| 3 | June 25, 2021 23:45 | June 26, 2021 07:45 | 8h | 352 | 732 |
| 4 | September 24, 2021 17:45 | September 24, 2021 18:00 | 15m | 316 | 79 |
| 5 | July 10, 2021 04:30 | July 12, 2021 06:45 | 2d 2h | 315 | 3,693 |
| 6 | December 5, 2021 13:15 | December 6, 2021 02:15 | 13h | 307 | 2,201 |
| 7 | June 25, 2021 00:45 | June 25, 2021 13:15 | 12h 30m | 250 | 668 |
| 8 | May 12, 2021 21:00 | May 13, 2021 17:00 | 20h | 215 | 612 |
| 9 | April 10, 2021 07:45 | April 10, 2021 13:45 | 6h | 214 | 1,284 |
| 10 | January 4, 2021 15:45 | January 6, 2021 14:00 | 1d 22h | 196 | 610 |
Outage episodes by size in 2021: 18 reached 100+ customers, 1 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 2021, 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 |
|---|---|---|---|---|---|
| Union Electric Co - (MO) | 2021 | 4.9 hrs | 1.02 | 1.5 hrs | 0.69 |
| Consolidated Electric Coop | 2021 | 4.0 hrs | 1.32 | 1.5 hrs | 0.64 |
| Cuivre River Electric Coop Inc | 2021 | 6.2 hrs | 1.56 | 2.2 hrs | 1.02 |
| Ameren | - | - | - | - | - |
| Callaway Electric Cooperative | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 95% of Missouri's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 5,285 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, MO annual power outage report, 2021, 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/2021/missouri/montgomery-county