Union Electric Co - (MO)
Investor Owned electric utility · Missouri · #29 of 3,199 U.S. utilities by customers · EIA utility #19436
Union Electric Co - (MO) is a investor owned electric utility serving 1,271,896 customers in Missouri. In 2025 it sold 31,739 gigawatt-hours of electricity for $3.59B in revenue, an average realized rate of 11.30¢ per kWh across all customer classes and 13.26¢ per kWh for residential customers. Its reported service territory covers 65 counties. EIA records its activities as: generation, transmission, buying transmission, distribution, wholesale marketing.
Customers, sales and rates by customer class (2025)
| Class | Customers | Sales (GWh) | Revenue | Avg realized rate | Share of sales |
|---|---|---|---|---|---|
| Residential | 1,100,654 | 13,634 | $1.81B | 13.26¢ | |
| Commercial | 167,657 | 13,997 | $1.44B | 10.29¢ | |
| Industrial | 3,584 | 4,086 | $334.68M | 8.19¢ | |
| Transportation | 1 | 22.5 | $2.50M | 11.12¢ | |
| Total | 1,271,896 | 31,739 | $3.59B | 11.30¢ |
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 (1,032 kWh/month).
Five-year trend
| Year | Customers | Sales (GWh) | Revenue | Residential rate |
|---|---|---|---|---|
| 2021 | 1,244,264 | 31,059 | $2.86B | 10.81¢ |
| 2022 | 1,250,115 | 31,866 | $3.10B | 11.34¢ |
| 2023 | 1,254,162 | 30,302 | $3.18B | 12.28¢ |
| 2024 | 1,264,469 | 30,764 | $3.27B | 12.56¢ |
| 2025 | 1,271,896 | 31,739 | $3.59B | 13.26¢ |
Reliability (2025)
Average outage time (SAIDI): 594 minutes per customer per year
Average outages (SAIFI): 1.18 per customer
Average restoration time (CAIDI): 503 minutes
As reported for Missouri 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: 32,166 GWh
Wholesale power purchased: 4,411 GWh
Winter peak demand: 6,623 MW
Energy losses: 4.1% of energy handled
Meters & rooftop solar (2025)
Smart (AMI) meters: 99.9% of 1,262,718 meters
Customer-sited generation (net metering): 11,045 installations, 142.7 MW of capacity
Counties served
Adair, MOAudrain, MOBollinger, MOBoone, MOButler, MOCaldwell, MOCallaway, MOCamden, MOCape Girardeau, MOChariton, MOClark, MOClay, MOClinton, MOCole, MOCooper, MOCrawford, MODaviess, MODeKalb, MODunklin, MOFranklin, MOGasconade, MOGentry, MOHoward, MOIron, MOJefferson, MOKnox, MOLewis, MOLincoln, MOLinn, MOLivingston, MOMacon, MOMadison, MOMaries, MOMarion, MOMiller, MOMississippi, MOMoniteau, MOMonroe, MOMontgomery, MOMorgan, MONew Madrid, MOOsage, MOPemiscot, MOPerry, MOPettis, MOPhelps, MOPike, MOPulaski, MORalls, MORandolph, MORay, MOReynolds, MOSaline, MOSchuyler, MOScotland, MOScott, MOSt Charles, MOSt Francois, MOSt Louis City, MOSt Louis, MO + 5 more counties
Other large utilities in Missouri
- Evergy Metro - 590,440 customers, residential 13.41¢
- Evergy Missouri West - 349,970 customers, residential 12.10¢
- Empire District Electric Co - 190,255 customers, residential 14.67¢
- City Utilities of Springfield - (MO) - 122,487 customers, residential 11.65¢
- Cuivre River Electric Coop Inc - 75,876 customers, residential 11.36¢
- City of Independence - (MO) - 59,213 customers, residential 16.54¢
- City of Columbia - (MO) - 53,559 customers, residential 15.50¢
- White River Valley El Coop Inc - 48,644 customers, residential 15.47¢
All Missouri utilities and rates
Source: U.S. Energy Information Administration, Form EIA-861 2025 (filed by the utility; figures as published). Utility #19436 in the EIA frame.