County annual report · FIPS 29099
2020 Jefferson County, MO Power Outage Report
In 2020, customers in Jefferson County, MO went without power for an average of 3.7 hours, a total of 403K customer-hours (Missouri average 2.8 hours). That ranks 50th worst of 115 Missouri counties and 1683rd of 3,019 nationally.
Compared with MO, the US and 2019
Coverage line is EAGLE-I's share of Missouri customers tracked each year.
Biggest outages in Jefferson County, 2020
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 10, 2020 22:00 | August 13, 2020 22:15 | 3d | 18,913 | 261K |
| 2 | May 24, 2020 17:45 | May 27, 2020 01:15 | 2d 7h | 3,417 | 11K |
| 3 | August 14, 2020 16:00 | August 14, 2020 20:00 | 4h | 2,243 | 659 |
| 4 | March 26, 2020 06:15 | March 26, 2020 07:00 | 45m | 2,036 | 1,018 |
| 5 | July 21, 2020 22:45 | July 24, 2020 11:30 | 2d 12h | 1,606 | 5,756 |
| 6 | December 23, 2020 20:00 | December 24, 2020 17:15 | 21h 15m | 1,590 | 5,147 |
| 7 | July 17, 2020 18:00 | July 18, 2020 04:30 | 10h 30m | 1,577 | 501 |
| 8 | June 30, 2020 16:30 | July 1, 2020 09:00 | 16h 30m | 1,472 | 1,098 |
| 9 | May 16, 2020 03:15 | May 16, 2020 06:15 | 3h | 1,410 | 1,768 |
| 10 | November 15, 2020 03:00 | November 16, 2020 10:30 | 1d 7h | 1,346 | 4,798 |
Outage episodes by size in 2020: 92 reached 100+ customers, 15 reached 1,000+ customers, 1 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 2020, 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) | 2020 | 2.6 hrs | 0.86 | 86 min | 0.71 |
| Crawford Electric Coop, Inc | 2020 | 6.0 hrs | 2.10 | 6.0 hrs | 2.10 |
| Citizens Electric Corporation - (MO) | 2020 | 73 min | 0.75 | 73 min | 0.75 |
| 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 2020; 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, 2020, 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/2020/missouri/jefferson-county