County annual report · FIPS 22103
2015 St. Tammany Parish, LA Power Outage Report
In 2015, customers in St. Tammany Parish, LA went without power for an average of 1.7 hours, a total of 284K customer-hours (Louisiana average 5.8 hours). That ranks 58th worst of 64 Louisiana counties and 1357th of 2,484 nationally.
Compared with LA, the US
Coverage line is EAGLE-I's share of Louisiana customers tracked each year.
Biggest outages in St. Tammany Parish, 2015
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 26, 2015 09:00 | May 27, 2015 02:45 | 17h 45m | 7,071 | 20K |
| 2 | November 7, 2015 03:30 | November 7, 2015 09:45 | 6h 15m | 5,185 | 24K |
| 3 | April 25, 2015 13:00 | April 26, 2015 09:15 | 20h 15m | 4,664 | 14K |
| 4 | April 13, 2015 12:00 | April 13, 2015 21:30 | 9h 30m | 4,648 | 5,223 |
| 5 | June 24, 2015 15:30 | June 24, 2015 18:45 | 3h 15m | 4,642 | 3,807 |
| 6 | October 25, 2015 09:00 | October 28, 2015 19:00 | 3d 10h | 4,632 | 32K |
| 7 | August 9, 2015 00:15 | August 9, 2015 20:45 | 20h 30m | 4,192 | 12K |
| 8 | April 27, 2015 11:45 | April 29, 2015 02:30 | 1d 14h | 2,893 | 3,123 |
| 9 | September 11, 2015 09:15 | September 12, 2015 06:45 | 21h 30m | 2,683 | 6,965 |
| 10 | May 23, 2015 02:45 | May 23, 2015 03:15 | 30m | 2,604 | 652 |
Outage episodes by size in 2015: 201 reached 100+ customers, 26 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. Tammany Parish reported on EIA Form 861 for 2015, 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 | 2015 | 6.2 hrs | 2.08 | 2.9 hrs | 1.63 |
| Washington-St Tammany E C, Inc | 2015 | 5.4 hrs | 2.13 | 5.4 hrs | 2.13 |
| 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 2015; 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, 2015, 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/2015/louisiana/st-tammany-parish