County annual report · FIPS 29510
2018 St. Louis city, MO Power Outage Report
In 2018, customers in St. Louis city, MO went without power for an average of 3.0 hours, a total of 319K customer-hours (Missouri average 1.7 hours). That ranks 24th worst of 96 Missouri counties and 1514th of 2,798 nationally.
Compared with MO, the US and 2017
Coverage line is EAGLE-I's share of Missouri customers tracked each year.
Biggest outages in St. Louis city, 2018
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | June 28, 2018 12:30 | July 3, 2018 07:30 | 4d 19h | 4,168 | 76K |
| 2 | July 14, 2018 12:15 | July 16, 2018 08:45 | 1d 20h | 3,787 | 49K |
| 3 | April 30, 2018 12:45 | April 30, 2018 20:45 | 8h | 2,859 | 755 |
| 4 | May 14, 2018 06:00 | May 16, 2018 09:15 | 2d 3h | 2,827 | 15K |
| 5 | February 18, 2018 08:15 | February 18, 2018 09:45 | 1h 30m | 2,204 | 554 |
| 6 | November 4, 2018 20:15 | November 5, 2018 05:15 | 9h | 2,167 | 1,641 |
| 7 | November 10, 2018 15:00 | November 11, 2018 01:00 | 10h | 2,073 | 578 |
| 8 | January 7, 2018 15:15 | January 8, 2018 07:15 | 16h | 2,065 | 6,774 |
| 9 | June 13, 2018 12:45 | June 16, 2018 10:00 | 2d 21h | 1,684 | 6,371 |
| 10 | August 2, 2018 08:30 | August 3, 2018 15:00 | 1d 6h | 1,638 | 6,864 |
Outage episodes by size in 2018: 114 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 city reported on EIA Form 861 for 2018, 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) | 2018 | 2.3 hrs | 0.85 | 86 min | 0.72 |
| 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 80% of Missouri's customers in 2018; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 106,898 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 city has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), St. Louis city, MO annual power outage report, 2018, 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/2018/missouri/st-louis-city