County annual report · FIPS 29131
2021 Miller County, MO Power Outage Report
In 2021, customers in Miller County, MO went without power for an average of 3.0 hours, a total of 38K customer-hours (Missouri average 4.5 hours). That ranks 65th worst of 115 Missouri counties and 1835th 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 Miller 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 | September 6, 2021 21:15 | September 7, 2021 02:45 | 5h 30m | 1,892 | 4,150 |
| 2 | January 1, 2021 09:00 | January 2, 2021 01:45 | 16h 45m | 1,883 | 7,131 |
| 3 | December 11, 2021 00:15 | December 11, 2021 21:30 | 21h 15m | 1,109 | 6,271 |
| 4 | February 15, 2021 15:15 | February 15, 2021 22:30 | 7h 15m | 1,087 | 3,552 |
| 5 | April 12, 2021 02:30 | April 12, 2021 12:15 | 9h 45m | 1,083 | 1,497 |
| 6 | February 27, 2021 14:30 | February 27, 2021 21:15 | 6h 45m | 561 | 3,059 |
| 7 | December 10, 2021 15:45 | December 10, 2021 17:00 | 1h 15m | 531 | 134 |
| 8 | March 14, 2021 20:30 | March 15, 2021 02:30 | 6h | 486 | 1,843 |
| 9 | May 29, 2021 00:15 | May 29, 2021 06:30 | 6h 15m | 453 | 1,196 |
| 10 | December 9, 2021 21:00 | December 9, 2021 21:45 | 45m | 434 | 326 |
Outage episodes by size in 2021: 19 reached 100+ customers, 5 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 Miller 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 |
| Co-Mo Electric Coop Inc | 2021 | 1.9 hrs | 0.88 | 67 min | 0.63 |
| Three Rivers Electric Coop | 2021 | 1.6 hrs | 0.72 | 71 min | 0.65 |
| Ameren | - | - | - | - | - |
| Gascosage Electric Coop | - | - | - | - | - |
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 ÷ 12,538 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. Miller County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Miller 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/miller-county