County annual report · FIPS 29099
2025 Jefferson County, MO Power Outage Report
In 2025, customers in Jefferson County, MO went without power for an average of 15.4 hours, a total of 1.7M customer-hours (Missouri average 8.9 hours). That ranks 25th worst of 115 Missouri counties and 490th of 3,000 nationally.
Compared with MO, the US and 2024
Coverage line is EAGLE-I's share of Missouri customers tracked each year.
Biggest outages in Jefferson County, 2025
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | March 14, 2025 13:45 | March 20, 2025 06:30 | 5d 16h | 29,155 | 948K |
| 2 | May 16, 2025 09:15 | May 22, 2025 23:30 | 6d 14h | 12,931 | 401K |
| 3 | January 13, 2025 04:45 | January 13, 2025 10:15 | 5h 30m | 5,105 | 2,564 |
| 4 | December 28, 2025 15:30 | December 29, 2025 20:00 | 1d 4h | 2,903 | 16K |
| 5 | April 10, 2025 12:15 | April 12, 2025 01:30 | 1d 13h | 2,824 | 12K |
| 6 | July 29, 2025 22:15 | July 31, 2025 10:15 | 1d 12h | 2,388 | 21K |
| 7 | October 18, 2025 15:15 | October 20, 2025 10:30 | 1d 19h | 2,353 | 15K |
| 8 | December 22, 2025 13:15 | December 22, 2025 23:15 | 10h | 2,096 | 757 |
| 9 | September 20, 2025 03:30 | September 20, 2025 20:15 | 16h 45m | 1,778 | 5,644 |
| 10 | July 17, 2025 14:15 | July 18, 2025 06:30 | 16h 15m | 1,700 | 669 |
Outage episodes by size in 2025: 127 reached 100+ customers, 21 reached 1,000+ customers, 2 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 Jefferson County reported on EIA Form 861 for 2025, 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) | 2024 | 2.5 hrs | 0.77 | 1.6 hrs | 0.67 |
| Crawford Electric Coop, Inc | 2024 | 5.9 hrs | 2.13 | 4.5 hrs | 1.94 |
| Citizens Electric Corporation - (MO) | 2024 | 2.4 hrs | 1.30 | 85 min | 0.89 |
| 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 n/a of Missouri's customers in 2025; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 108,266 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. Jefferson County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Jefferson County, MO annual power outage report, 2025, 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/2025/missouri/jefferson-county