County annual report · FIPS 29053
2021 Cooper County, MO Power Outage Report
In 2021, customers in Cooper County, MO went without power for an average of 3.7 hours, a total of 29K customer-hours (Missouri average 4.5 hours). That ranks 57th worst of 115 Missouri counties and 1615th 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 Cooper 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 | January 1, 2021 11:30 | January 2, 2021 00:45 | 13h 15m | 1,182 | 9,005 |
| 2 | June 20, 2021 11:00 | June 20, 2021 14:15 | 3h 15m | 1,147 | 291 |
| 3 | May 2, 2021 05:15 | May 2, 2021 08:15 | 3h | 649 | 1,832 |
| 4 | June 25, 2021 06:15 | June 25, 2021 14:45 | 8h 30m | 538 | 2,004 |
| 5 | August 12, 2021 21:15 | August 13, 2021 06:15 | 9h | 534 | 2,378 |
| 6 | April 29, 2021 00:00 | April 29, 2021 07:45 | 7h 45m | 526 | 1,034 |
| 7 | October 14, 2021 05:15 | October 14, 2021 07:30 | 2h 15m | 472 | 1,062 |
| 8 | February 12, 2021 03:45 | February 12, 2021 04:00 | 15m | 351 | 88 |
| 9 | August 3, 2021 15:15 | August 3, 2021 15:45 | 30m | 350 | 175 |
| 10 | July 15, 2021 21:15 | July 16, 2021 00:45 | 3h 30m | 292 | 942 |
Outage episodes by size in 2021: 20 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 Cooper 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 |
| Ameren | - | - | - | - | - |
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 ÷ 7,941 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. Cooper County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Cooper 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/cooper-county