County annual report · FIPS 22103
2025 St. Tammany Parish, LA Power Outage Report
In 2025, customers in St. Tammany Parish, LA went without power for an average of 2.8 hours, a total of 458K customer-hours (Louisiana average 6.2 hours). That ranks 58th worst of 64 Louisiana counties and 2138th of 3,000 nationally.
Compared with LA, the US and 2024
Coverage line is EAGLE-I's share of Louisiana customers tracked each year.
Biggest outages in St. Tammany Parish, 2025
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 25, 2025 21:00 | May 26, 2025 03:00 | 6h | 23,349 | 19K |
| 2 | July 26, 2025 15:15 | July 28, 2025 21:15 | 2d 6h | 9,922 | 14K |
| 3 | February 15, 2025 16:15 | February 17, 2025 01:15 | 1d 9h | 9,456 | 77K |
| 4 | August 22, 2025 14:15 | August 23, 2025 19:00 | 1d 4h | 5,986 | 23K |
| 5 | January 25, 2025 18:15 | January 25, 2025 21:00 | 2h 45m | 4,475 | 1,134 |
| 6 | July 24, 2025 12:15 | July 25, 2025 05:00 | 16h 45m | 4,424 | 6,704 |
| 7 | January 29, 2025 20:00 | January 29, 2025 21:45 | 1h 45m | 4,361 | 1,092 |
| 8 | March 10, 2025 21:15 | March 11, 2025 05:45 | 8h 30m | 4,184 | 3,162 |
| 9 | April 8, 2025 11:45 | April 8, 2025 23:30 | 11h 45m | 3,770 | 3,113 |
| 10 | June 14, 2025 22:30 | June 17, 2025 02:00 | 2d 3h | 3,724 | 6,697 |
Outage episodes by size in 2025: 203 reached 100+ customers, 50 reached 1,000+ customers, 1 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 2025, 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 | 2024 | 10.2 hrs | 2.04 | 3.6 hrs | 1.55 |
| Washington-St Tammany E C, Inc | 2024 | 25.1 hrs | 4.93 | 4.0 hrs | 2.61 |
| 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 2025; 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, 2025, 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/2025/louisiana/st-tammany-parish