Cleveland Electric Illum Co
Investor Owned electric utility · Ohio · #180 of 3,199 U.S. utilities by customers · EIA utility #3755
Cleveland Electric Illum Co is a investor owned electric utility serving 148,793 customers in Ohio. In 2025 it sold 1,469 gigawatt-hours of electricity for $241.23M in revenue, an average realized rate of 16.42¢ per kWh across all customer classes and 16.22¢ per kWh for residential customers. Its reported service territory covers 9 counties. EIA records its activities as: distribution, wholesale marketing.
Customers, sales and rates by customer class (2025)
| Class | Customers | Sales (GWh) | Revenue | Avg realized rate | Share of sales |
|---|---|---|---|---|---|
| Residential | 137,419 | 1,048 | $169.99M | 16.22¢ | |
| Commercial | 11,315 | 333 | $60.35M | 18.11¢ | |
| Industrial | 59 | 88.0 | $10.89M | 12.37¢ | |
| Total | 148,793 | 1,469 | $241.23M | 16.42¢ |
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 (636 kWh/month).
Five-year trend
| Year | Customers | Sales (GWh) | Revenue | Residential rate |
|---|---|---|---|---|
| 2021 | 179,397 | 2,041 | $244.05M | 12.86¢ |
| 2022 | 275,903 | 3,779 | $416.94M | 13.19¢ |
| 2023 | 323,511 | 4,308 | $551.95M | 14.40¢ |
| 2024 | 142,657 | 1,409 | $239.69M | 16.76¢ |
| 2025 | 148,793 | 1,469 | $241.23M | 16.22¢ |
Reliability (2025)
Average outage time (SAIDI): 195 minutes per customer per year
Average outages (SAIFI): 1.37 per customer
Average restoration time (CAIDI): 143 minutes
As reported for Ohio 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: 1,575 GWh
Winter peak demand: 3,192 MW
Energy losses: 5.8% of energy handled
Meters & rooftop solar (2025)
Smart (AMI) meters: 49.2% of 777,176 meters
Customer-sited generation (net metering): 3,189 installations, 46.2 MW of capacity
This utility also reported 611,054 delivery-only customers (15,807 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
Ashtabula, OHCuyahoga, OHGeauga, OHLake, OHLorain, OHMedina, OHPortage, OHSummit, OHTrumbull, OH
Other large utilities in Ohio
- Adjustment 2025 - 4,559,641 customers, residential 13.93¢
- Dynegy Energy Services, LLC - 793,547 customers, residential 9.00¢
- NextEra Energy Services, LLC - 753,301 customers, residential 9.28¢
- AEP Energy - 618,459 customers, residential 8.66¢
- Ohio Power Co - 594,848 customers, residential 18.97¢
- Energy Harbor Corp. - 410,524 customers, residential 7.89¢
- Interstate Gas Supply, Inc. - 322,025 customers, residential 11.51¢
- Duke Energy Ohio Inc - 297,189 customers, residential 16.83¢
Source: U.S. Energy Information Administration, Form EIA-861 2025 (filed by the utility; figures as published). Utility #3755 in the EIA frame.