County annual report · FIPS 29133
2021 Mississippi County, MO Power Outage Report
In 2021, customers in Mississippi County, MO went without power for an average of 1.6 hours, a total of 9,556 customer-hours (Missouri average 4.5 hours). That ranks 92nd worst of 115 Missouri counties and 2392nd 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 Mississippi 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 | August 1, 2021 01:30 | August 1, 2021 06:30 | 5h | 712 | 1,619 |
| 2 | May 30, 2021 09:15 | May 30, 2021 11:30 | 2h 15m | 648 | 1,310 |
| 3 | October 4, 2021 09:15 | October 4, 2021 10:30 | 1h 15m | 648 | 810 |
| 4 | November 19, 2021 06:30 | November 19, 2021 08:00 | 1h 30m | 646 | 969 |
| 5 | February 16, 2021 19:00 | February 17, 2021 04:45 | 9h 45m | 407 | 2,043 |
| 6 | December 14, 2021 05:45 | December 14, 2021 07:45 | 2h | 290 | 508 |
| 7 | August 28, 2021 07:00 | August 28, 2021 20:15 | 13h 15m | 166 | 294 |
| 8 | December 5, 2021 09:30 | December 5, 2021 20:15 | 10h 45m | 74 | 301 |
| 9 | August 10, 2021 21:45 | August 10, 2021 23:45 | 2h | 45 | 90 |
| 10 | April 10, 2021 22:00 | April 11, 2021 00:15 | 2h 15m | 34 | 67 |
Outage episodes by size in 2021: 7 reached 100+ customers, 0 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 Mississippi 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 |
| Ameren | - | - | - | - | - |
| SEMO 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 ÷ 5,838 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. Mississippi County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Mississippi 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/mississippi-county