County annual report · FIPS 29189
2017 St. Louis County, MO Power Outage Report
In 2017, customers in St. Louis County, MO went without power for an average of 0.6 hours, a total of 368K customer-hours (Missouri average 2.8 hours). That ranks 67th worst of 106 Missouri counties and 2230th of 2,786 nationally.
Compared with MO, the US and 2016
Coverage line is EAGLE-I's share of Missouri customers tracked each year.
Biggest outages in St. Louis County, 2017
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 6, 2017 11:30 | March 9, 2017 04:00 | 2d 16h | 8,686 | 37K |
| 2 | April 28, 2017 05:00 | May 12, 2017 02:00 | 13d 21h | 5,097 | 93K |
| 3 | March 29, 2017 14:00 | March 30, 2017 11:45 | 21h 45m | 5,034 | 5,205 |
| 4 | February 11, 2017 17:00 | February 12, 2017 00:30 | 7h 30m | 4,484 | 4,693 |
| 5 | October 20, 2017 04:00 | October 21, 2017 23:00 | 1d 19h | 3,923 | 2,052 |
| 6 | November 1, 2017 11:15 | November 2, 2017 01:45 | 14h 30m | 3,094 | 2,398 |
| 7 | February 21, 2017 11:00 | February 22, 2017 06:45 | 19h 45m | 2,809 | 2,156 |
| 8 | April 11, 2017 11:15 | April 14, 2017 06:45 | 2d 19h | 2,553 | 4,695 |
| 9 | February 24, 2017 04:00 | February 25, 2017 22:30 | 1d 18h | 2,539 | 7,482 |
| 10 | February 28, 2017 19:15 | March 2, 2017 06:00 | 1d 10h | 2,375 | 4,782 |
Outage episodes by size in 2017: 110 reached 100+ customers, 24 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 2017, 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) | 2017 | 4.1 hrs | 1.04 | 85 min | 0.68 |
| 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 2017; 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, 2017, 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/2017/missouri/st-louis-county