CORE Electric Cooperative
Cooperative electric utility · Colorado · #162 of 3,199 U.S. utilities by customers · EIA utility #9336
CORE Electric Cooperative is a cooperative electric utility serving 182,993 customers in Colorado. In 2025 it sold 2,620 gigawatt-hours of electricity for $380.48M in revenue, an average realized rate of 14.52¢ per kWh across all customer classes and 15.62¢ per kWh for residential customers. Its reported service territory covers 11 counties. EIA records its activities as: generation, transmission, buying transmission, distribution.
Customers, sales and rates by customer class (2025)
| Class | Customers | Sales (GWh) | Revenue | Avg realized rate | Share of sales |
|---|---|---|---|---|---|
| Residential | 168,587 | 1,706 | $266.47M | 15.62¢ | |
| Commercial | 14,396 | 859 | $108.82M | 12.67¢ | |
| Industrial | 10 | 54.9 | $5.19M | 9.46¢ | |
| Total | 182,993 | 2,620 | $380.48M | 14.52¢ |
Average realized rate = revenue divided by sales as reported on EIA Form 861. It blends fixed charges, demand charges and riders into one per-kWh figure; it is not the utility's tariff rate. Estimated residential bill assumes the average residential customer's actual 2025 usage (843 kWh/month).
Five-year trend
| Year | Customers | Sales (GWh) | Revenue | Residential rate |
|---|---|---|---|---|
| 2021 | 169,454 | 2,575 | $324.81M | 13.47¢ |
| 2022 | 171,889 | 2,630 | $351.60M | 14.28¢ |
| 2023 | 175,725 | 2,518 | $342.54M | 14.53¢ |
| 2024 | 180,823 | 2,632 | $368.48M | 15.04¢ |
| 2025 | 182,993 | 2,620 | $380.48M | 15.62¢ |
Reliability (2025)
Average outage time (SAIDI): 381 minutes per customer per year
Average outages (SAIFI): 0.97 per customer
Average restoration time (CAIDI): 394 minutes
As reported for Colorado under the IEEE standard, with major event days included where the standard reports them. Lower is better; see the reliability rankings.
Energy supply (2025)
Net generation: 661 GWh
Wholesale power purchased: 2,192 GWh
Winter peak demand: 496 MW
Energy losses: 4.1% of energy handled
Meters & rooftop solar (2025)
Smart (AMI) meters: 100.0% of 182,993 meters
Customer-sited generation (net metering): 10,478 installations, 59.6 MW of capacity
Counties served
Adams, COArapahoe, COChaffee, COClear Creek, CODouglas, COEl Paso, COElbert, COFremont, COJefferson, COPark, COTeller, CO
Other large utilities in Colorado
- Public Service Co of Colorado - 1,605,246 customers, residential 15.90¢
- City of Colorado Springs - (CO) - 264,106 customers, residential 15.43¢
- United Power, Inc - 115,479 customers, residential 16.50¢
- Black Hills Colorado Electric, LLC - 111,502 customers, residential 18.71¢
- City of Fort Collins - (CO) - 80,929 customers, residential 14.34¢
- Mountain View Elec Assn, Inc - 65,946 customers, residential 15.65¢
- Holy Cross Electric Assn, Inc - 61,834 customers, residential 12.45¢
- Poudre Valley REA, Inc - 56,750 customers, residential 12.47¢
All Colorado utilities and rates
Source: U.S. Energy Information Administration, Form EIA-861 2025 (filed by the utility; figures as published). Utility #9336 in the EIA frame.