County annual report · FIPS 05091
2021 Miller County, AR Power Outage Report
In 2021, customers in Miller County, AR went without power for an average of 12.8 hours, a total of 199K customer-hours (Arkansas average 5.4 hours). That ranks 13th worst of 75 Arkansas counties and 645th of 2,974 nationally.
Compared with AR, the US and 2020
Coverage line is EAGLE-I's share of Arkansas customers tracked each year.
Biggest outages in Miller County, 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 | April 10, 2021 04:45 | April 12, 2021 23:45 | 2d 19h | 6,912 | 69K |
| 2 | March 28, 2021 00:30 | March 29, 2021 00:45 | 1d | 4,731 | 27K |
| 3 | April 24, 2021 07:15 | April 25, 2021 01:00 | 17h 45m | 4,387 | 16K |
| 4 | February 15, 2021 00:00 | February 15, 2021 18:15 | 18h 15m | 3,834 | 11K |
| 5 | February 16, 2021 12:00 | February 17, 2021 15:00 | 1d 3h | 2,767 | 9,110 |
| 6 | May 9, 2021 22:45 | May 10, 2021 03:30 | 4h 45m | 1,669 | 1,180 |
| 7 | April 28, 2021 21:15 | April 29, 2021 05:00 | 7h 45m | 1,668 | 2,173 |
| 8 | August 26, 2021 21:45 | August 26, 2021 23:45 | 2h | 1,657 | 2,054 |
| 9 | July 30, 2021 20:00 | July 31, 2021 01:30 | 5h 30m | 1,656 | 463 |
| 10 | December 29, 2021 22:30 | December 30, 2021 07:45 | 9h 15m | 1,510 | 1,875 |
Outage episodes by size in 2021: 48 reached 100+ customers, 16 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 Miller County 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 Arkansas LLC | 2021 | 6.4 hrs | 1.76 | 4.4 hrs | 1.51 |
| Southwestern Electric Power Co | 2021 | 11.8 hrs | 2.41 | 5.1 hrs | 1.79 |
| Southwest Arkansas E C C | 2021 | 8.2 hrs | 1.79 | 5.8 hrs | 1.49 |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 86% of Arkansas's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 15,516 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. Miller County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Miller County, AR 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/arkansas/miller-county