City of St Charles - (IL)
Municipal electric utility · Illinois · #822 of 3,199 U.S. utilities by customers · EIA utility #17860
City of St Charles - (IL) is a municipal electric utility serving 17,027 customers in Illinois. In 2025 it sold 490 gigawatt-hours of electricity for $58.43M in revenue, an average realized rate of 11.92¢ per kWh across all customer classes and 14.58¢ per kWh for residential customers. Its reported service territory covers 2 counties. EIA records its activities as: distribution.
Customers, sales and rates by customer class (2025)
| Class | Customers | Sales (GWh) | Revenue | Avg realized rate | Share of sales |
|---|---|---|---|---|---|
| Residential | 14,901 | 127 | $18.53M | 14.58¢ | |
| Commercial | 2,087 | 174 | $20.87M | 11.99¢ | |
| Industrial | 39 | 189 | $19.03M | 10.08¢ | |
| Total | 17,027 | 490 | $58.43M | 11.92¢ |
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 (711 kWh/month).
Five-year trend
| Year | Customers | Sales (GWh) | Revenue | Residential rate |
|---|---|---|---|---|
| 2021 | 16,193 | 499 | $59.81M | 14.60¢ |
| 2022 | 16,266 | 493 | $60.14M | 14.68¢ |
| 2023 | 16,346 | 472 | $58.77M | 14.80¢ |
| 2024 | 16,461 | 474 | $60.24M | 15.37¢ |
| 2025 | 17,027 | 490 | $58.43M | 14.58¢ |
Reliability (2025)
Average outage time (SAIDI): 46 minutes per customer per year
Average outages (SAIFI): 0.27 per customer
Average restoration time (CAIDI): 171 minutes
As reported for Illinois under the Other 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: 498 GWh
Winter peak demand: 73 MW
Energy losses: 1.5% of energy handled
Meters & rooftop solar (2025)
Smart (AMI) meters: 0.0% of 17,027 meters
Customer-sited generation (net metering): 58 installations, 2.8 MW of capacity
Counties served
DuPage, ILKane, 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 #17860 in the EIA frame.