County annual report · FIPS 22101
2020 St. Mary Parish, LA Power Outage Report
In 2020, customers in St. Mary Parish, LA went without power for an average of 10.8 hours, a total of 298K customer-hours (Louisiana average 72.6 hours). That ranks 58th worst of 64 Louisiana counties and 743rd of 3,019 nationally.
Compared with LA, the US and 2019
Coverage line is EAGLE-I's share of Louisiana customers tracked each year.
Biggest outages in St. Mary Parish, 2020
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | September 21, 2020 01:15 | September 21, 2020 19:30 | 18h 15m | 7,659 | 2,365 |
| 2 | October 8, 2020 13:45 | October 13, 2020 20:45 | 5d 7h | 7,154 | 169K |
| 3 | August 10, 2020 15:15 | September 1, 2020 22:00 | 22d 6h | 2,816 | 67K |
| 4 | May 5, 2020 15:15 | May 5, 2020 16:00 | 45m | 2,500 | 1,867 |
| 5 | February 24, 2020 16:45 | February 24, 2020 17:30 | 45m | 2,290 | 575 |
| 6 | November 8, 2020 20:00 | November 9, 2020 01:45 | 5h 45m | 2,218 | 1,555 |
| 7 | January 19, 2020 03:15 | January 19, 2020 06:00 | 2h 45m | 2,203 | 1,860 |
| 8 | December 14, 2020 11:00 | December 14, 2020 13:45 | 2h 45m | 1,958 | 2,183 |
| 9 | July 3, 2020 19:00 | July 4, 2020 02:45 | 7h 45m | 1,672 | 3,167 |
| 10 | May 31, 2020 00:00 | May 31, 2020 05:30 | 5h 30m | 1,495 | 1,698 |
Outage episodes by size in 2020: 65 reached 100+ customers, 12 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 2020, 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 2020; 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, 2020, 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/2020/louisiana/st-mary-parish