How reliable is the power in Colorado?
Colorado ranks 24th of 45 states without major events and 19th with them (1st = fewest minutes), 12 below the U.S. 129 and 404 below the U.S. 662. Major events added 140 minutes, 54% of the with-events total. The figure covers 2,671,334 customers, 91% of the 2,926,290 EIA lists for Colorado.
Colorado with and without major events
minutes without power per customer, 2024, Colorado and U.S.
- 117Colorado, no major events
- 129U.S., no major events
- 258Colorado, with major events
- 662U.S., with major events
| Measure | Colorado without | Colorado with | U.S. without | U.S. with |
|---|---|---|---|---|
| SAIDI, minutes per customer | 117 | 258 | 129 | 662 |
| SAIFI, interruptions per customer | 1.15 | 1.42 | 1.06 | 1.53 |
| CAIDI, minutes per interruption | 103 | 182 | 122 | 433 |
| Median utility, SAIDI minutes | 74 | 153 | — | — |
Which Colorado utilities move the number
Public Service Co of Colorado serves 57% of the customers in the Colorado figure: 78% of lost customer-minutes with major events, 77% without. Without Public Service Co of Colorado, the weighted figure would be 133 minutes with major events and 64 without, against 258 and 117.
- Public Service Co of Colorado: 1,523,795 customers (57%), 158 min without and 352 with; 78% of lost minutes with major events, 77% without.
- CORE Electric Cooperative: 178,763 customers (7%), 74 min without and 212 with; 6% of lost minutes with major events, 4% without.
- Black Hills Colorado Electric, LLC: 100,052 customers (4%), 101 min without and 323 with; 5% of lost minutes with major events, 3% without.
All Colorado utilities in the 2024 file
55 utilities in the 2024 EIA-861 files for Colorado: 21 follow IEEE 1366, 4 use another method, 30 filed no reliability figures. 25 are listed.
| City of Fort Collins - (CO) | Municipal | IEEE 1366 | 79,990 | 11 | 11 | 0.24 | 0.24 | 0 | 1 of 17 | — |
|---|---|---|---|---|---|---|---|---|---|---|
| City of Fountain | Municipal | IEEE 1366 | 17,628 | 18 | 18 | 0.15 | 0.15 | 0 | 2 of 17 | — |
| City of Loveland - (CO) | Municipal | IEEE 1366 | 41,790 | 19 | 81 | 0.18 | 0.18 | 77 | 3 of 17 | — |
| City of Longmont | Municipal | IEEE 1366 | 48,509 | 19 | 19 | 0.47 | 0.47 | 0 | 4 of 17 | — |
| Mountain View Elec Assn, Inc | Cooperative | IEEE 1366 | 63,853 | 42 | 56 | 0.46 | 0.49 | 25 | 5 of 17 | — |
| City of Colorado Springs - (CO) | Municipal | IEEE 1366 | 256,580 | 45 | 63 | 0.81 | 0.87 | 29 | 6 of 17 | — |
| Holy Cross Electric Assn, Inc | Cooperative | IEEE 1366 | 61,786 | 56 | 56 | 1.16 | 1.16 | 0 | 7 of 17 | — |
| La Plata Electric Assn, Inc | Cooperative | IEEE 1366 | 46,842 | 72 | 184 | 1.02 | 1.44 | 61 | 8 of 17 | — |
| CORE Electric Cooperative | Cooperative | IEEE 1366 | 178,763 | 74 | 212 | 0.75 | 0.93 | 65 | 9 of 17 | — |
| Poudre Valley REA, Inc | Cooperative | IEEE 1366 | 55,762 | 74 | 325 | 0.72 | 1.33 | 77 | 10 of 17 | — |
| United Power, Inc | Cooperative | IEEE 1366 | 114,202 | 77 | 77 | 1.20 | 1.20 | 0 | 11 of 17 | — |
| Mountain Parks Electric, Inc | Cooperative | IEEE 1366 | 22,847 | 85 | 149 | 1.13 | 1.76 | 43 | 12 of 17 | — |
| San Luis Valley R E C, Inc | Cooperative | IEEE 1366 | 13,026 | 96 | 296 | 0.89 | 1.78 | 67 | 13 of 17 | — |
| Black Hills Colorado Electric, LLC | Investor Owned | IEEE 1366 | 100,052 | 101 | 323 | 1.42 | 2.39 | 69 | 14 of 17 | — |
| Public Service Co of Colorado | Investor Owned | IEEE 1366 | 1,523,795 | 158 | 352 | 1.36 | 1.68 | 55 | 15 of 17 | — |
| Empire Electric Assn, Inc | Cooperative | IEEE 1366 | 17,211 | 158 | 158 | 1.76 | 1.76 | 0 | 16 of 17 | — |
| Yampa Valley Electric Assn Inc | Cooperative | IEEE 1366 | 28,698 | 234 | 294 | 1.94 | 2.20 | 20 | 17 of 17 | — |
| Delta Montrose Electric Assn | Cooperative | IEEE 1366 | 37,555 | 96 | 158 | — | 1.42 | — | Not ranked | — |
| San Isabel Electric Assn, Inc | Cooperative | Other method | 26,590 | 81 | 81 | 0.75 | 0.75 | — | Not ranked | other method, not comparable |
| Grand Valley Power | Cooperative | IEEE 1366 | 19,649 | 94 | 94 | — | — | — | Not ranked | — |
| Southeast Colorado Power Assn | Cooperative | IEEE 1366 | 10,994 | 472 | 675 | — | — | — | Not ranked | — |
| Morgan County Rural Elec Assn | Cooperative | Other method | 9,607 | 161 | 161 | — | — | — | Not ranked | other method, not comparable; under 10,000 customers |
| Y-W Electric Assn Inc | Cooperative | IEEE 1366 | 8,856 | 270 | 270 | — | — | — | Not ranked | under 10,000 customers |
| White River Electric Assn, Inc | Cooperative | Other method | 3,521 | 141 | 141 | 1.41 | 1.41 | — | Not ranked | other method, not comparable; under 10,000 customers |
| Moon Lake Electric Assn Inc | Cooperative | Other method | 2,672 | 466 | 466 | 1.84 | 1.84 | — | Not ranked | other method, not comparable; under 10,000 customers |
Colorado utilities with no reliability figures
30 in the sales file, no SAIDI or SAIFI row; the 25 largest are listed.
| Utility | Type | Customers |
|---|---|---|
| San Miguel Power Assn, Inc | Cooperative | 14,851 |
| Tesla Inc. | Behind the Meter | 13,913 |
| Sunrun Inc. | Behind the Meter | 8,558 |
| Highline Electric Assn | Cooperative | 8,543 |
| City of Fort Morgan | Municipal | 7,134 |
| K C Electric Association | Cooperative | 6,625 |
| High West Energy, Inc | Cooperative | 1,056 |
| Wheatland Electric Coop, Inc | Cooperative | 59 |
| Tri-County Electric Coop, Inc (OK) | Cooperative | 55 |
| Greenbacker Renewable Energy Corporation | Behind the Meter | 39 |
| TerraForm US Energy Services, LLC | Behind the Meter | 13 |
| WAPA-- Western Area Power Administration | Federal | 12 |
| Greenskies Renewable Energy, LLC | Behind the Meter | 1 |
| Gunnison County Elec Assn. | Cooperative | — |
| City of Trinidad - (CO) | Municipal | — |
| City of Center - (CO) | Municipal | — |
| City of Aspen- (CO) | Municipal | — |
| Town of Estes Park | Municipal | — |
| Town of Oak Creek - (CO) | Municipal | — |
| Municipal Energy Agency of NE | Not stated | — |
| Town of Lyons - (CO) | Municipal | — |
| City of Lamar - (CO) | Municipal | — |
| City of Yuma - (CO) | Municipal | — |
| City of Las Animas - (CO) | Municipal | — |
| Sangre De Cristo Elec Assn Inc | Cooperative | — |
The biggest Colorado utilities against the U.S.
- Public Service Co of Colorado (investor owned, 54% of Colorado customers in the file): SAIDI without major events 158 min, 29 above the U.S. 129; with major events 352 min against 662.
- City of Colorado Springs - (CO) (municipal, 9% of Colorado customers in the file): SAIDI without major events 45 min, 85 below the U.S. 129; with major events 63 min against 662.
- CORE Electric Cooperative (cooperative, 6% of Colorado customers in the file): SAIDI without major events 74 min, 55 below the U.S. 129; with major events 212 min against 662.
- United Power, Inc (cooperative, 4% of Colorado customers in the file): SAIDI without major events 77 min, 52 below the U.S. 129; with major events 77 min against 662.
- Black Hills Colorado Electric, LLC (investor owned, 3% of Colorado customers in the file): SAIDI without major events 101 min, 28 below the U.S. 129; with major events 323 min against 662.
Colorado by type of utility
Among Colorado utilities that report under IEEE 1366, municipal utilities average 32 minutes without major events and investor owned utilities 155.
| Type | Utilities | Customers | SAIDI without | Median utility | SAIDI with |
|---|---|---|---|---|---|
| Investor Owned | 2 | 1,623,847 | 155 | 130 | 350 |
| Cooperative | 10 | 602,990 | 80 | 76 | 164 |
| Municipal | 5 | 444,497 | 32 | 19 | 49 |
Next to Colorado in the ranking
Colorado report card
Smart meters: 94% of residential meters, 21 utilities (U.S. 92%). Colorado time-based rates: 13 of 20 utilities, 49.3% of residential customers enrolled (U.S. 10.6%). Colorado efficiency spend: $40.5 per customer (U.S. $124.2). Demand response: 205 W per customer (U.S. 77). Colorado net-metered systems: 64.3 per 1,000 customers. Rankings.
Is your Colorado utility better or worse than the Colorado median?
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- Colorado against all states
- Colorado utilities among the best and worst
- Colorado utility reliability and price by company
- Colorado major outage reports from the Department of Energy
- Colorado electricity prices
- Colorado help with your bill
25 Colorado filings in EIA-861 2024 (retrieved 2026-10-01), 17 ranked utilities. Method and sources.
Questions
How many minutes without power did the average Colorado customer have in 2024?
117 minutes without major events and 258 with them (21 IEEE 1366 utilities, customer-weighted).
Why do the two Colorado numbers differ so much?
Major events add 140 of the 258 minutes (54%); Public Service Co of Colorado supplies 78% of the with-events total.
Which Colorado utility reported the fewest and the most minutes?
Among 17 utilities with 10,000+ customers: City of Fort Collins - (CO) 11 minutes without major events, and Yampa Valley Electric Assn Inc 234.
Which Colorado utilities use which method?
21 follow IEEE 1366, 4 use another method, 30 filed no reliability figures.