County annual report · FIPS 37101
2021 Johnston County, NC Power Outage Report
In 2021, customers in Johnston County, NC went without power for an average of 14.8 hours, a total of 204K customer-hours (North Carolina average 10.3 hours). That ranks 28th worst of 94 North Carolina counties and 574th of 2,974 nationally.
Compared with NC, the US and 2020
Coverage line is EAGLE-I's share of North Carolina customers tracked each year.
Biggest outages in Johnston 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 | September 3, 2021 19:15 | September 4, 2021 00:45 | 5h 30m | 7,058 | 2,599 |
| 2 | May 29, 2021 19:45 | May 30, 2021 09:45 | 14h | 3,100 | 16K |
| 3 | January 2, 2021 03:00 | January 2, 2021 09:00 | 6h | 2,852 | 4,969 |
| 4 | August 7, 2021 04:45 | August 8, 2021 01:00 | 20h 15m | 2,841 | 8,826 |
| 5 | July 30, 2021 11:15 | July 30, 2021 18:45 | 7h 30m | 2,767 | 715 |
| 6 | February 6, 2021 04:45 | February 6, 2021 11:45 | 7h | 2,726 | 1,534 |
| 7 | August 19, 2021 19:45 | August 21, 2021 13:45 | 1d 18h | 2,688 | 4,670 |
| 8 | September 22, 2021 12:15 | September 23, 2021 00:15 | 12h | 2,684 | 3,118 |
| 9 | July 16, 2021 18:15 | July 17, 2021 05:00 | 10h 45m | 2,337 | 6,949 |
| 10 | September 29, 2021 10:15 | September 29, 2021 21:15 | 11h | 2,316 | 5,144 |
Outage episodes by size in 2021: 144 reached 100+ customers, 26 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 Johnston 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 |
|---|---|---|---|---|---|
| Duke Energy Progress - (NC) | 2021 | 3.1 hrs | 1.39 | 2.4 hrs | 1.34 |
| City of Wilson - (NC) | 2021 | 49 min | 0.64 | 41 min | 0.60 |
| Tri-County Elec Member Corp (NC) | 2018 | 51.3 hrs | 2.31 | - | - |
| Wake Electric Membership Corp | 2021 | 1.6 hrs | 1.14 | 68 min | 0.79 |
| Duke Energy | - | - | - | - | - |
| South River Elec Member Corp | - | - | - | - | - |
| Town of Benson - (NC) | - | - | - | - | - |
| Town of Clayton - (NC) | - | - | - | - | - |
| Town of Selma - (NC) | - | - | - | - | - |
| Town of Smithfield - (NC) | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 92% of North Carolina's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 13,828 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. Johnston County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Johnston County, NC 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/north-carolina/johnston-county