County annual report · FIPS 29189
2015 St. Louis County, MO Power Outage Report
In 2015, customers in St. Louis County, MO went without power for an average of 1.9 hours, a total of 1.1M customer-hours (Missouri average 2.2 hours). That ranks 33rd worst of 93 Missouri counties and 1266th of 2,484 nationally.
Compared with MO, the US
Coverage line is EAGLE-I's share of Missouri customers tracked each year.
Biggest outages in St. Louis County, 2015
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | May 14, 2015 10:15 | May 17, 2015 12:15 | 3d 2h | 8,944 | 45K |
| 2 | August 9, 2015 23:00 | August 12, 2015 08:00 | 2d 9h | 8,399 | 60K |
| 3 | June 24, 2015 11:30 | June 29, 2015 09:00 | 4d 21h | 8,163 | 114K |
| 4 | July 27, 2015 12:00 | August 2, 2015 18:30 | 6d 6h | 7,834 | 119K |
| 5 | December 13, 2015 11:30 | December 15, 2015 11:00 | 1d 23h | 6,172 | 18K |
| 6 | July 1, 2015 11:00 | July 4, 2015 07:30 | 2d 20h | 5,075 | 88K |
| 7 | June 3, 2015 11:00 | June 7, 2015 01:30 | 3d 14h | 4,943 | 26K |
| 8 | December 21, 2015 06:00 | December 21, 2015 06:15 | 15m | 4,540 | 1,135 |
| 9 | December 26, 2015 14:30 | December 31, 2015 00:15 | 4d 9h | 3,907 | 77K |
| 10 | November 11, 2015 07:30 | November 13, 2015 09:30 | 2d 2h | 3,833 | 19K |
Outage episodes by size in 2015: 138 reached 100+ customers, 43 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 St. Louis County reported on EIA Form 861 for 2015, 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) | 2015 | 1.9 hrs | 0.82 | 1.6 hrs | 0.77 |
| Ameren | - | - | - | - | - |
| City of Kirkwood - (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 n/a of Missouri's customers in 2015; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 594,469 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. St. Louis County has data for 2015–2021, 2025.
Cite this report
MassOutage (massoutage.com), St. Louis County, MO annual power outage report, 2015, 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/2015/missouri/st-louis-county