County annual report · FIPS 22101
2021 St. Mary Parish, LA Power Outage Report
In 2021, customers in St. Mary Parish, LA went without power for an average of 8.5 hours, a total of 236K customer-hours (Louisiana average 99.7 hours). That ranks 52nd worst of 64 Louisiana counties and 892nd 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 St. Mary 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 28, 2021 12:45 | August 31, 2021 22:00 | 3d 9h | 6,871 | 146K |
| 2 | February 15, 2021 02:45 | February 24, 2021 22:45 | 9d 20h | 2,523 | 29K |
| 3 | August 23, 2021 14:15 | August 26, 2021 19:45 | 3d 5h | 1,910 | 2,769 |
| 4 | April 13, 2021 15:15 | April 14, 2021 00:30 | 9h 15m | 1,822 | 854 |
| 5 | February 8, 2021 16:30 | February 11, 2021 19:45 | 3d 3h | 1,370 | 1,788 |
| 6 | July 28, 2021 02:45 | July 28, 2021 03:15 | 30m | 1,308 | 654 |
| 7 | July 26, 2021 05:00 | July 26, 2021 06:45 | 1h 45m | 1,303 | 779 |
| 8 | January 4, 2021 05:30 | January 4, 2021 06:45 | 1h 15m | 1,292 | 1,424 |
| 9 | August 16, 2021 12:45 | August 16, 2021 22:45 | 10h | 1,278 | 2,044 |
| 10 | March 17, 2021 21:00 | March 18, 2021 22:30 | 1d 1h | 1,275 | 3,676 |
Outage episodes by size in 2021: 59 reached 100+ customers, 11 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. Mary 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 |
|---|---|---|---|---|---|
| Cleco Power LLC | - | - | - | - | - |
| Colquitt Electric Membership Corp | - | - | - | - | - |
| South Louisiana Elec Coop Assn | - | - | - | - | - |
| Morgan City - (LA) | - | - | - | - | - |
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 ÷ 27,709 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. Mary Parish has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), St. Mary 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/). https://massoutage.com/reports/2021/louisiana/st-mary-parish