MidAmerican Energy Co
Investor Owned electric utility · Iowa · #49 of 3,199 U.S. utilities by customers · EIA utility #12341
MidAmerican Energy Co is a investor owned electric utility serving 838,069 customers in Iowa, Illinois, South Dakota. In 2025 it sold 32,913 gigawatt-hours of electricity for $2.58B in revenue, an average realized rate of 7.83¢ per kWh across all customer classes and 11.08¢ per kWh for residential customers. Its reported service territory covers 60 counties. EIA records its activities as: generation, transmission, buying transmission, distribution, wholesale marketing, bundled.
Customers, sales and rates by customer class (2025)
| Class | Customers | Sales (GWh) | Revenue | Avg realized rate | Share of sales |
|---|---|---|---|---|---|
| Residential | 717,275 | 7,068 | $783.16M | 11.08¢ | |
| Commercial | 119,202 | 5,743 | $500.21M | 8.71¢ | |
| Industrial | 1,592 | 20,102 | $1.29B | 6.43¢ | |
| Total | 838,069 | 32,913 | $2.58B | 7.83¢ |
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 (821 kWh/month).
Operations by state
| State | Customers | Sales (GWh) | Residential rate |
|---|---|---|---|
| Iowa | 746,438 | 30,811 | 11.21¢ |
| Illinois | 86,298 | 1,787 | 9.99¢ |
| South Dakota | 5,333 | 316 | 8.90¢ |
Five-year trend
| Year | Customers | Sales (GWh) | Revenue | Residential rate |
|---|---|---|---|---|
| 2021 | 804,061 | 28,074 | $2.10B | 10.69¢ |
| 2022 | 810,119 | 29,290 | $2.30B | 10.93¢ |
| 2023 | 820,462 | 29,675 | $2.29B | 10.88¢ |
| 2024 | 829,195 | 30,036 | $2.26B | 10.90¢ |
| 2025 | 838,069 | 32,913 | $2.58B | 11.08¢ |
Reliability (2025)
Average outage time (SAIDI): 205 minutes per customer per year
Average outages (SAIFI): 1.19 per customer
Average restoration time (CAIDI): 172 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: 43,903 GWh
Wholesale power purchased: 4,919 GWh
Winter peak demand: 4,967 MW
Energy losses: 2.1% of energy handled
Meters & rooftop solar (2025)
Smart (AMI) meters: 0.0% of 839,095 meters
Customer-sited generation (net metering): 6,379 installations, 103.6 MW of capacity
This utility also reported 59 delivery-only customers (12.2 GWh delivered) in 2025. Delivery figures are excluded from the totals above because the same electricity is also reported by the energy supplier - see Methodology.
Counties served
Adair, IAAdams, IAAudubon, IABlack Hawk, IABremer, IABuchanan, IABuena Vista, IAButler, IACalhoun, IACarroll, IACass, IACerro Gordo, IACherokee, IAChickasaw, IAClinton, IACrawford, IADallas, IAFloyd, IAFranklin, IAFremont, IAHamilton, IAHardin, IAHarrison, IAHenry, ILHumboldt, IAIda, IAJasper, IAJohnson, IAKossuth, IALincoln, SDLyon, IAMadison, IAMahaska, IAMarion, IAMercer, ILMills, IAMonona, IAMonroe, IAMontgomery, IAMuscatine, IAO'Brien, IAPage, IAPalo Alto, IAPlymouth, IAPocahontas, IAPolk, IAPottawattamie, IAPoweshiek, IARock Island, ILSac, IAScott, IAShelby, IASioux, IATaylor, IAUnion, SDWarren, IAWashington, IAWebster, IAWoodbury, IAWright, IA
Other large utilities in Iowa
- Interstate Power and Light Co - 506,498 customers, residential 17.77¢
- Corridor Energy Cooperative - 35,447 customers, residential 14.18¢
- City of Ames - (IA) - 28,239 customers, residential 12.12¢
- 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 #12341 in the EIA frame.