County annual report · FIPS 22103
2019 St. Tammany Parish, LA Power Outage Report
In 2019, customers in St. Tammany Parish, LA went without power for an average of 8.0 hours, a total of 1.3M customer-hours (Louisiana average 10.2 hours). That ranks 42nd worst of 64 Louisiana counties and 710th of 2,945 nationally.
Compared with LA, the US and 2018
Coverage line is EAGLE-I's share of Louisiana customers tracked each year.
Biggest outages in St. Tammany Parish, 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 | October 25, 2019 11:45 | October 30, 2019 23:15 | 5d 11h | 40,301 | 921K |
| 2 | January 29, 2019 11:00 | January 30, 2019 07:45 | 20h 45m | 19,418 | 50K |
| 3 | June 28, 2019 16:30 | June 29, 2019 20:15 | 1d 3h | 8,697 | 20K |
| 4 | July 11, 2019 07:30 | July 12, 2019 02:00 | 18h 30m | 5,495 | 1,954 |
| 5 | January 3, 2019 23:15 | January 4, 2019 10:30 | 11h 15m | 4,146 | 2,076 |
| 6 | August 28, 2019 16:45 | August 29, 2019 06:45 | 14h | 4,082 | 5,860 |
| 7 | June 26, 2019 10:15 | June 26, 2019 14:15 | 4h | 3,972 | 6,456 |
| 8 | July 27, 2019 19:00 | August 28, 2019 13:15 | 31d 18h | 3,796 | 51K |
| 9 | November 12, 2019 05:15 | December 14, 2019 04:00 | 31d 22h | 3,536 | 28K |
| 10 | January 15, 2019 20:00 | January 16, 2019 21:45 | 1d 1h | 3,405 | 3,444 |
Outage episodes by size in 2019: 131 reached 100+ customers, 35 reached 1,000+ customers, 2 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 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 |
|---|---|---|---|---|---|
| Entergy Louisiana LLC | 2018 | 4.6 hrs | 1.84 | 3.5 hrs | 1.63 |
| Washington-St Tammany E C, Inc | 2018 | 6.0 hrs | 3.74 | 6.0 hrs | 3.74 |
| 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 89% of Louisiana's customers in 2019; 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, 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/louisiana/st-tammany-parish