County annual report · FIPS 32003
2021 Clark County, NV Power Outage Report
In 2021, customers in Clark County, NV went without power for an average of 1.4 hours, a total of 1.4M customer-hours (Nevada average 1.7 hours). That ranks 13th worst of 15 Nevada counties and 2520th of 2,974 nationally.
Compared with NV, the US and 2020
Coverage line is EAGLE-I's share of Nevada customers tracked each year.
Biggest outages in Clark 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 | February 13, 2021 21:45 | February 17, 2021 11:30 | 3d 13h | 40,695 | 323K |
| 2 | April 22, 2021 15:30 | April 23, 2021 03:30 | 12h | 15,888 | 4,127 |
| 3 | April 3, 2021 03:30 | April 4, 2021 05:15 | 1d 1h | 15,840 | 24K |
| 4 | July 25, 2021 19:30 | July 31, 2021 11:30 | 5d 16h | 14,747 | 95K |
| 5 | February 9, 2021 08:00 | February 9, 2021 10:00 | 2h | 13,743 | 21K |
| 6 | October 31, 2021 13:00 | November 3, 2021 13:30 | 3d | 13,243 | 6,199 |
| 7 | October 11, 2021 18:15 | October 13, 2021 12:15 | 1d 18h | 11,420 | 49K |
| 8 | April 30, 2021 12:15 | May 2, 2021 09:45 | 1d 21h | 10,601 | 17K |
| 9 | December 13, 2021 13:30 | December 28, 2021 04:30 | 14d 15h | 10,339 | 60K |
| 10 | March 11, 2021 15:30 | March 13, 2021 06:45 | 1d 15h | 9,851 | 16K |
Outage episodes by size in 2021: 257 reached 100+ customers, 98 reached 1,000+ customers, 9 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 Clark 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 |
|---|---|---|---|---|---|
| Southern California Edison Co | 2021 | 3.0 hrs | 1.11 | 1.7 hrs | 0.96 |
| Valley Electric Assn, Inc | 2021 | 87 min | 0.77 | 34 min | 0.47 |
| Nevada Power Co | 2021 | 82 min | 0.68 | 52 min | 0.54 |
| Overton Power District No 5 | 2021 | 51 min | 0.60 | 51 min | 0.60 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| NV Energy | - | - | - | - | - |
| Aha Macav Power Service | - | - | - | - | - |
| City of Boulder City - (NV) | - | - | - | - | - |
| Colorado River Comm of Nevada | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 97% of Nevada's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 1,008,802 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. Clark County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Clark County, NV 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/nevada/clark-county