City of Longmont
Municipal electric utility · Colorado · #392 of 3,199 U.S. utilities by customers · EIA utility #11187
City of Longmont is a municipal electric utility serving 44,390 customers in Colorado. In 2025 it sold 805 gigawatt-hours of electricity for $97.32M in revenue, an average realized rate of 12.10¢ per kWh across all customer classes and 13.12¢ per kWh for residential customers. Its reported service territory covers 2 counties. EIA records its activities as: generation, distribution.
Customers, sales and rates by customer class (2025)
| Class | Customers | Sales (GWh) | Revenue | Avg realized rate | Share of sales |
|---|---|---|---|---|---|
| Residential | 41,483 | 335 | $44.00M | 13.12¢ | |
| Commercial | 2,897 | 337 | $40.69M | 12.08¢ | |
| Industrial | 10 | 132 | $12.62M | 9.55¢ | |
| Total | 44,390 | 805 | $97.32M | 12.10¢ |
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 (674 kWh/month).
Five-year trend
| Year | Customers | Sales (GWh) | Revenue | Residential rate |
|---|---|---|---|---|
| 2021 | 42,558 | 813 | $77.52M | 10.81¢ |
| 2022 | 42,863 | 816 | $80.90M | 11.09¢ |
| 2023 | 43,268 | 816 | $85.46M | 11.59¢ |
| 2024 | 43,741 | 817 | $91.56M | 12.30¢ |
| 2025 | 44,390 | 805 | $97.32M | 13.12¢ |
Reliability (2025)
Average outage time (SAIDI): 40 minutes per customer per year
Average outages (SAIFI): 0.56 per customer
Average restoration time (CAIDI): 71 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: 1.9 GWh
Wholesale power purchased: 830 GWh
Winter peak demand: 136 MW
Energy losses: 2.6% of energy handled
Meters & rooftop solar (2025)
Smart (AMI) meters: 99.3% of 49,487 meters
Customer-sited generation (net metering): 1,099 installations, 8.5 MW of capacity
Counties served
Boulder, COWeld, 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¢
- CORE Electric Cooperative - 182,993 customers, residential 15.62¢
- 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¢
All Colorado utilities and rates
Source: U.S. Energy Information Administration, Form EIA-861 2025 (filed by the utility; figures as published). Utility #11187 in the EIA frame.