County annual report · FIPS 22103
2023 St. Tammany Parish, LA Power Outage Report
In 2023, customers in St. Tammany Parish, LA went without power for an average of 3.4 hours, a total of 557K customer-hours (Louisiana average 12.8 hours). That ranks 56th worst of 64 Louisiana counties and 1834th of 2,977 nationally.
Compared with LA, the US and 2022
Coverage line is EAGLE-I's share of Louisiana customers tracked each year.
Biggest outages in St. Tammany Parish, 2023
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 15, 2023 14:00 | April 18, 2023 00:15 | 2d 10h | 15,400 | 58K |
| 2 | August 15, 2023 13:00 | August 17, 2023 02:45 | 1d 13h | 13,275 | 43K |
| 3 | July 26, 2023 02:45 | July 26, 2023 04:30 | 1h 45m | 12,798 | 10K |
| 4 | May 6, 2023 13:30 | May 8, 2023 04:45 | 1d 15h | 10,209 | 55K |
| 5 | December 24, 2023 21:45 | December 26, 2023 00:45 | 1d 3h | 8,563 | 7,970 |
| 6 | August 23, 2023 12:00 | August 31, 2023 03:45 | 7d 15h | 7,336 | 51K |
| 7 | September 7, 2023 20:45 | September 9, 2023 05:15 | 1d 8h | 5,571 | 24K |
| 8 | April 18, 2023 05:15 | April 19, 2023 22:00 | 1d 16h | 5,330 | 17K |
| 9 | December 20, 2023 02:00 | December 20, 2023 12:15 | 10h 15m | 3,811 | 16K |
| 10 | September 6, 2023 06:00 | September 6, 2023 10:30 | 4h 30m | 3,486 | 1,906 |
Outage episodes by size in 2023: 182 reached 100+ customers, 42 reached 1,000+ customers, 4 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. Tammany Parish reported on EIA Form 861 for 2023, 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 |
|---|---|---|---|---|---|
| Entergy Louisiana LLC | 2023 | 3.8 hrs | 1.39 | 3.0 hrs | 1.26 |
| Washington-St Tammany E C, Inc | 2023 | 6.7 hrs | 3.55 | 6.4 hrs | 1.31 |
| Cleco Power LLC | - | - | - | - | - |
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 Louisiana's customers in 2023; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 164,188 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. Tammany Parish has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), St. Tammany Parish, LA annual power outage report, 2023, 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/2023/louisiana/st-tammany-parish