County annual report · FIPS 29059
2021 Dallas County, MO Power Outage Report
In 2021, customers in Dallas County, MO went without power for an average of 3.3 hours, a total of 20K customer-hours (Missouri average 4.5 hours). That ranks 61st worst of 115 Missouri counties and 1744th 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 Dallas 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 07:15 | January 2, 2021 07:15 | 1d | 1,882 | 6,461 |
| 2 | December 11, 2021 00:00 | December 11, 2021 06:45 | 6h 45m | 1,251 | 1,385 |
| 3 | December 22, 2021 19:15 | December 22, 2021 19:45 | 30m | 494 | 124 |
| 4 | September 15, 2021 10:30 | September 15, 2021 14:15 | 3h 45m | 352 | 403 |
| 5 | July 17, 2021 22:45 | July 18, 2021 03:45 | 5h | 288 | 642 |
| 6 | May 27, 2021 17:15 | May 28, 2021 03:30 | 10h 15m | 249 | 1,016 |
| 7 | June 26, 2021 09:00 | June 26, 2021 11:45 | 2h 45m | 226 | 452 |
| 8 | April 11, 2021 00:15 | April 11, 2021 04:15 | 4h | 217 | 803 |
| 9 | January 29, 2021 17:15 | January 29, 2021 18:15 | 1h | 203 | 203 |
| 10 | April 3, 2021 04:45 | April 3, 2021 05:00 | 15m | 203 | 51 |
Outage episodes by size in 2021: 19 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 Dallas 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 |
|---|---|---|---|---|---|
| Empire District Electric Co | 2021 | 2.4 hrs | 1.25 | 88 min | 0.98 |
| Southwest Electric Coop, Inc | 2021 | 2.3 hrs | 1.00 | 1.7 hrs | 1.00 |
| Laclede Electric Coop, Inc | 2021 | 2.2 hrs | 1.91 | 2.1 hrs | 1.80 |
| Webster 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 ÷ 5,897 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. Dallas County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), Dallas 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/dallas-county