Grundy County Rural Elec Coop
Cooperative electric utility · Iowa · #2,028 of 3,199 U.S. utilities by customers · EIA utility #7864
Grundy County Rural Elec Coop is a cooperative electric utility serving 2,265 customers in Iowa. In 2025 it sold 92.5 gigawatt-hours of electricity for $9.70M in revenue, an average realized rate of 10.49¢ per kWh across all customer classes and — per kWh for residential customers. Its reported service territory covers 6 counties.
Customers, sales and rates by customer class (2025)
| Class | Customers | Sales (GWh) | Revenue | Avg realized rate | Share of sales |
|---|---|---|---|---|---|
| Total | 2,265 | 92.5 | $9.70M | 10.49¢ |
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 (— kWh/month).
This utility files the EIA-861S short form, which reports totals only - no breakdown by customer class is published for it.
Five-year trend
| Year | Customers | Sales (GWh) | Revenue | Residential rate |
|---|---|---|---|---|
| 2021 | 2,273 | 86.6 | $8.57M | — |
| 2022 | 2,279 | 110 | $9.29M | — |
| 2023 | 2,272 | 105 | $8.81M | — |
| 2024 | 2,267 | 96.9 | $8.94M | — |
| 2025 | 2,265 | 92.5 | $9.70M | — |
Meters & rooftop solar (2025)
Smart (AMI) meters: 100.0% of 2,265 meters
Counties served
Black Hawk, IAButler, IAGrundy, IAHardin, IAMarshall, IATama, 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¢
- 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¢
Source: U.S. Energy Information Administration, Form EIA-861 2025 (filed by the utility; figures as published). Utility #7864 in the EIA frame.