County annual report · FIPS 37037
2021 Chatham County, NC Power Outage Report
In 2021, customers in Chatham County, NC went without power for an average of 36.6 hours, a total of 139K customer-hours (North Carolina average 10.3 hours). That ranks 17th worst of 94 North Carolina counties and 246th 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 Chatham 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 | May 3, 2021 16:15 | May 4, 2021 03:45 | 11h 30m | 8,038 | 8,125 |
| 2 | September 22, 2021 05:45 | September 22, 2021 18:15 | 12h 30m | 6,701 | 8,959 |
| 3 | January 4, 2021 02:45 | January 4, 2021 08:15 | 5h 30m | 2,888 | 7,307 |
| 4 | September 1, 2021 11:00 | September 1, 2021 17:00 | 6h | 2,715 | 710 |
| 5 | September 21, 2021 06:15 | September 21, 2021 08:15 | 2h | 2,647 | 4,633 |
| 6 | June 10, 2021 20:00 | June 11, 2021 05:45 | 9h 45m | 2,631 | 7,603 |
| 7 | January 1, 2021 22:00 | January 2, 2021 07:30 | 9h 30m | 2,031 | 4,648 |
| 8 | March 8, 2021 20:15 | March 8, 2021 21:15 | 1h | 2,027 | 2,027 |
| 9 | February 13, 2021 12:00 | February 15, 2021 16:30 | 2d 4h | 1,788 | 4,952 |
| 10 | December 15, 2021 13:30 | December 15, 2021 20:00 | 6h 30m | 1,664 | 859 |
Outage episodes by size in 2021: 103 reached 100+ customers, 14 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 Chatham 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 |
| Duke Energy Carolinas, LLC | 2021 | 3.5 hrs | 1.20 | 2.5 hrs | 1.10 |
| Piedmont Electric Member Corp | 2021 | 10.5 hrs | 1.66 | 2.0 hrs | 1.03 |
| Central Electric Membership Corp. - (NC) | 2021 | 2.5 hrs | - | 1.9 hrs | - |
| Randolph Electric Member Corp | 2021 | 1.6 hrs | 1.49 | 83 min | 1.40 |
| Duke Energy | - | - | - | - | - |
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 ÷ 3,797 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. Chatham County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Chatham 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/chatham-county