County annual report · FIPS 29211
2021 Sullivan County, MO Power Outage Report
In 2021, customers in Sullivan County, MO went without power for an average of 2.7 hours, a total of 4,820 customer-hours (Missouri average 4.5 hours). That ranks 73rd worst of 115 Missouri counties and 1967th 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 Sullivan 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 | December 16, 2021 01:45 | December 16, 2021 10:15 | 8h 30m | 574 | 4,118 |
| 2 | October 24, 2021 22:30 | October 25, 2021 03:00 | 4h 30m | 51 | 105 |
| 3 | June 24, 2021 15:45 | June 24, 2021 19:45 | 4h | 33 | 120 |
| 4 | June 21, 2021 01:15 | June 21, 2021 12:30 | 11h 15m | 30 | 242 |
| 5 | June 7, 2021 22:00 | June 8, 2021 00:30 | 2h 30m | 20 | 50 |
| 6 | July 29, 2021 23:45 | July 30, 2021 01:15 | 1h 30m | 20 | 13 |
| 7 | June 1, 2021 16:00 | June 1, 2021 16:45 | 45m | 14 | 11 |
| 8 | October 25, 2021 17:15 | October 25, 2021 18:00 | 45m | 11 | 8 |
| 9 | May 7, 2021 23:00 | May 8, 2021 00:00 | 1h | 10 | 4 |
| 10 | May 8, 2021 23:30 | May 9, 2021 01:45 | 2h 15m | 10 | 19 |
Outage episodes by size in 2021: 1 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 Sullivan 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 |
| Grundy Electric Coop, Inc | - | - | - | - | - |
| Macon Electric Coop | - | - | - | - | - |
| Tri-County Electric Coop Assn (MO) | - | - | - | - | - |
| North Central MO Elec Coop Inc | - | - | - | - | - |
| City of Milan - (MO) | - | - | - | - | - |
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 ÷ 1,796 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. Sullivan County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Sullivan 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/sullivan-county