County annual report · FIPS 29189
2019 St. Louis County, MO Power Outage Report
In 2019, customers in St. Louis County, MO went without power for an average of 2.9 hours, a total of 1.7M customer-hours (Missouri average 3.8 hours). That ranks 49th worst of 115 Missouri counties and 1702nd of 2,945 nationally.
Compared with MO, the US and 2018
Coverage line is EAGLE-I's share of Missouri customers tracked each year.
Biggest outages in St. Louis County, 2019
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | April 14, 2019 04:15 | April 17, 2019 04:30 | 3d | 28,721 | 326K |
| 2 | July 17, 2019 12:00 | July 21, 2019 22:30 | 4d 10h | 14,859 | 118K |
| 3 | November 26, 2019 13:45 | November 29, 2019 00:00 | 2d 10h | 12,097 | 86K |
| 4 | February 24, 2019 01:45 | February 26, 2019 05:15 | 2d 3h | 9,808 | 81K |
| 5 | October 1, 2019 13:00 | October 5, 2019 02:45 | 3d 13h | 8,986 | 19K |
| 6 | August 10, 2019 12:00 | August 28, 2019 10:00 | 17d 22h | 8,474 | 146K |
| 7 | January 19, 2019 07:30 | January 21, 2019 01:15 | 1d 17h | 7,718 | 38K |
| 8 | June 1, 2019 20:15 | June 4, 2019 09:45 | 2d 13h | 7,450 | 74K |
| 9 | May 18, 2019 02:00 | May 26, 2019 11:15 | 8d 9h | 7,278 | 87K |
| 10 | April 19, 2019 13:15 | April 21, 2019 02:45 | 1d 13h | 4,720 | 10K |
Outage episodes by size in 2019: 164 reached 100+ customers, 57 reached 1,000+ customers, 3 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 2019, 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 | - | - | - | - | - |
| 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 95% of Missouri's customers in 2019; 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, 2019, 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/2019/missouri/st-louis-county