County annual report · FIPS 08029
2021 Delta County, CO Power Outage Report
In 2021, customers in Delta County, CO went without power for an average of 2.1 hours, a total of 25K customer-hours (Colorado average 2.8 hours). That ranks 30th worst of 52 Colorado counties and 2186th of 2,974 nationally.
Compared with CO, the US and 2020
Coverage line is EAGLE-I's share of Colorado customers tracked each year.
Biggest outages in Delta 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 30, 2021 00:15 | September 30, 2021 05:00 | 4h 45m | 3,840 | 9,862 |
| 2 | May 22, 2021 20:00 | May 23, 2021 02:45 | 6h 45m | 3,470 | 5,683 |
| 3 | June 29, 2021 22:30 | June 29, 2021 22:45 | 15m | 633 | 158 |
| 4 | July 24, 2021 05:45 | July 24, 2021 12:30 | 6h 45m | 560 | 2,176 |
| 5 | July 31, 2021 03:30 | July 31, 2021 04:30 | 1h | 553 | 303 |
| 6 | June 14, 2021 16:15 | June 14, 2021 17:00 | 45m | 488 | 366 |
| 7 | August 9, 2021 13:00 | August 13, 2021 20:15 | 4d 7h | 380 | 790 |
| 8 | September 2, 2021 13:15 | September 2, 2021 16:15 | 3h | 272 | 209 |
| 9 | July 21, 2021 01:45 | July 21, 2021 15:15 | 13h 30m | 223 | 787 |
| 10 | September 19, 2021 03:00 | September 19, 2021 07:00 | 4h | 223 | 892 |
Outage episodes by size in 2021: 15 reached 100+ customers, 2 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 Delta 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 |
|---|---|---|---|---|---|
| Public Service Co of Colorado | 2021 | 3.0 hrs | 1.20 | 2.2 hrs | 1.00 |
| Delta Montrose Electric Assn | 2013 | 89 min | 0.64 | 47 min | 0.48 |
| Grand Valley Power | 2021 | 45 min | - | 45 min | - |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| City of Delta - (CO) | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 83% of Colorado's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 11,874 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. Delta County has data for 2019–2025.
Cite this report
MassOutage (massoutage.com), Delta County, CO 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/colorado/delta-county