Southwestern Electric Coop Inc - (IL)
Cooperative electric utility · Illinois · #619 of 3,199 U.S. utilities by customers · EIA utility #17697
Southwestern Electric Coop Inc - (IL) is a cooperative electric utility serving 24,885 customers in Illinois. In 2025 it sold 527 gigawatt-hours of electricity for $74.38M in revenue, an average realized rate of 14.12¢ per kWh across all customer classes and 15.37¢ per kWh for residential customers. Its reported service territory covers 11 counties. EIA records its activities as: buying transmission, distribution.
Customers, sales and rates by customer class (2025)
| Class | Customers | Sales (GWh) | Revenue | Avg realized rate | Share of sales |
|---|---|---|---|---|---|
| Residential | 24,414 | 340 | $52.22M | 15.37¢ | |
| Commercial | 450 | 80.3 | $11.45M | 14.26¢ | |
| Industrial | 21 | 107 | $10.72M | 10.03¢ | |
| Total | 24,885 | 527 | $74.38M | 14.12¢ |
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 (1,160 kWh/month).
Five-year trend
| Year | Customers | Sales (GWh) | Revenue | Residential rate |
|---|---|---|---|---|
| 2021 | 23,848 | 441 | $59.34M | 13.10¢ |
| 2022 | 24,007 | 454 | $60.32M | 12.98¢ |
| 2023 | 25,140 | 470 | $61.20M | 13.20¢ |
| 2024 | 25,284 | 484 | $64.32M | 13.68¢ |
| 2025 | 24,885 | 527 | $74.38M | 15.37¢ |
Reliability (2025)
Average outage time (SAIDI): 241 minutes per customer per year
Average outages (SAIFI): 1.92 per customer
Average restoration time (CAIDI): 126 minutes
As reported for Illinois 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: — GWh
Wholesale power purchased: 547 GWh
Winter peak demand: 92 MW
Energy losses: 3.6% of energy handled
Meters & rooftop solar (2025)
Smart (AMI) meters: 100.0% of 24,885 meters
Counties served
Bond, ILClay, ILClinton, ILEffingham, ILFayette, ILMacoupin, ILMadison, ILMarion, ILMontgomery, ILShelby, ILSt Clair, IL
Other large utilities in Illinois
- Commonwealth Edison Co - 3,261,563 customers, residential 17.71¢
- Ameren Illinois Company - 663,709 customers, residential 16.70¢
- MC Squared Energy Services, LLC - 293,923 customers, residential 8.14¢
- Homefield Energy - 160,102 customers, residential 10.64¢
- Energy Services Providers, Inc - 90,477 customers, residential 13.01¢
- Just Energy Solutions Inc. - 80,538 customers, residential 11.33¢
- City of Springfield - (IL) - 70,871 customers, residential 13.09¢
- Residents Energy, LLC - 69,834 customers, residential 17.34¢
All Illinois utilities and rates
Source: U.S. Energy Information Administration, Form EIA-861 2025 (filed by the utility; figures as published). Utility #17697 in the EIA frame.