County annual report · FIPS 22109
2021 Terrebonne Parish, LA Power Outage Report
In 2021, customers in Terrebonne Parish, LA went without power for an average of 296.5 hours, a total of 12.0M customer-hours (Louisiana average 99.7 hours). That ranks 5th worst of 64 Louisiana counties and 15th of 2,974 nationally.
Compared with LA, the US and 2020
Coverage line is EAGLE-I's share of Louisiana customers tracked each year.
Biggest outages in Terrebonne Parish, 2021
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | August 29, 2021 12:00 | October 21, 2021 02:00 | 52d 14h | 27,666 | 11.5M |
| 2 | October 21, 2021 05:16 | December 31, 2021 00:15 | 70d 18h | 7,327 | 363K |
| 3 | January 11, 2021 09:15 | January 12, 2021 00:30 | 15h 15m | 3,643 | 17K |
| 4 | January 25, 2021 14:00 | January 25, 2021 17:15 | 3h 15m | 3,592 | 4,820 |
| 5 | April 13, 2021 19:00 | April 13, 2021 21:30 | 2h 30m | 2,755 | 3,590 |
| 6 | May 11, 2021 13:15 | May 12, 2021 23:30 | 1d 10h | 2,551 | 6,396 |
| 7 | August 25, 2021 15:15 | August 26, 2021 02:15 | 11h | 2,200 | 6,120 |
| 8 | January 3, 2021 17:30 | January 3, 2021 18:30 | 1h | 2,128 | 2,128 |
| 9 | August 9, 2021 17:30 | August 9, 2021 19:15 | 1h 45m | 1,908 | 516 |
| 10 | June 8, 2021 12:45 | June 9, 2021 05:15 | 16h 30m | 1,880 | 5,423 |
Outage episodes by size in 2021: 68 reached 100+ customers, 23 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 Terrebonne Parish reported on EIA Form 861 for 2021, 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 | 2021 | 111.5 hrs | 3.16 | 4.1 hrs | 1.62 |
| South Louisiana Elec Coop Assn | - | - | - | - | - |
| Terrebonne Parish Consol Gov't | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 90% of Louisiana's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 40,577 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. Terrebonne Parish has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Terrebonne Parish, LA annual power outage report, 2021, 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/2021/louisiana/terrebonne-parish