City of Ames - (IA)
Municipal electric utility · Iowa · #561 of 3,199 U.S. utilities by customers · EIA utility #554
City of Ames - (IA) is a municipal electric utility serving 28,239 customers in Iowa. In 2025 it sold 673 gigawatt-hours of electricity for $64.85M in revenue, an average realized rate of 9.64¢ per kWh across all customer classes and 12.12¢ per kWh for residential customers. Its reported service territory covers 1 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 | 25,123 | 180 | $21.82M | 12.12¢ | |
| Commercial | 3,109 | 352 | $31.00M | 8.80¢ | |
| Industrial | 7 | 140 | $12.04M | 8.58¢ | |
| Total | 28,239 | 673 | $64.85M | 9.64¢ |
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 (597 kWh/month).
Five-year trend
| Year | Customers | Sales (GWh) | Revenue | Residential rate |
|---|---|---|---|---|
| 2021 | 27,961 | 659 | $59.33M | 11.55¢ |
| 2022 | 27,950 | 672 | $62.69M | 11.73¢ |
| 2023 | 27,940 | 671 | $63.20M | 12.19¢ |
| 2024 | 28,108 | 651 | $61.01M | 12.10¢ |
| 2025 | 28,239 | 673 | $64.85M | 12.12¢ |
Reliability (2025)
Average outage time (SAIDI): 21 minutes per customer per year
Average outages (SAIFI): 0.39 per customer
Average restoration time (CAIDI): 54 minutes
As reported for Iowa 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: 282 GWh
Wholesale power purchased: 502 GWh
Winter peak demand: 100 MW
Energy losses: 3.5% of energy handled
Meters & rooftop solar (2025)
Smart (AMI) meters: 5.6% of 27,972 meters
Customer-sited generation (net metering): 900 installations, 2.6 MW of capacity
Counties served
Story, IA
Other large utilities in Iowa
- MidAmerican Energy Co - 838,069 customers, residential 11.08¢
- Interstate Power and Light Co - 506,498 customers, residential 17.77¢
- Corridor Energy Cooperative - 35,447 customers, residential 14.18¢
- Eastern Iowa Light & Power Coop - 23,856 customers, residential 14.81¢
- Cedar Falls Utilities - 20,245 customers, residential 11.56¢
- Maquoketa Valley Rrl Elec Coop - 17,339 customers, residential 13.80¢
- Iowa Lakes Electric Coop - 13,257 customers, residential 13.78¢
- Midland Power Coop - 12,708 customers, residential 13.66¢
Source: U.S. Energy Information Administration, Form EIA-861 2025 (filed by the utility; figures as published). Utility #554 in the EIA frame.