An electric utility is a company or organization responsible for delivering electricity to homes and businesses. In most of the United States, your electric utility handles everything from generating or purchasing power to maintaining the lines that carry it to your neighborhood, reading your meter, and sending you a monthly bill. Some utilities do all of this themselves, while others focus only on the delivery side. The distinction depends on where you live and how your state’s electricity market is structured.
How Electricity Gets to You
The electricity system works in three stages: generation, transmission, and distribution. Power plants produce electricity using fuels like natural gas, coal, nuclear energy, or renewable sources such as wind, solar, and hydropower. That electricity then travels over high-voltage transmission lines, the tall metal towers you see stretching across open land, which carry power over long distances. Along the way, substations use transformers to increase or decrease the voltage depending on what’s needed at each stage of the journey.
The final stage is distribution. Local electric utilities operate the distribution system that connects you to the broader grid. Transformers near your neighborhood step the voltage down to safer levels suitable for household appliances and business equipment. Whether the electricity originally came from a solar farm, a natural gas plant, or a wind turbine hundreds of miles away, your local utility is the one that gets it to your outlet.
Three Types of Electric Utilities
Not all utilities are built the same way. The three main types differ in who owns them, how they’re funded, and who they answer to.
- Investor-owned utilities (IOUs) are for-profit companies owned by shareholders who may or may not live in the area the utility serves. They raise money through a combination of shareholder equity and debt from bonds or bank borrowing. IOUs serve the majority of U.S. electricity customers and are the utilities most people are familiar with.
- Municipal utilities are owned by a unit of local government, most commonly a city. They operate as not-for-profit entities and finance their operations through tax-free bonds. Because they answer to local elected officials, their priorities often reflect community goals like keeping rates low.
- Electric cooperatives are not-for-profit organizations owned by their members, who are also their customers. They typically finance operations through low-interest loans from the federal government or specialized cooperative lenders. Co-ops were originally created to bring electricity to rural areas that investor-owned utilities found unprofitable to serve, and they still primarily operate in rural parts of the country.
Vertically Integrated vs. Restructured Markets
In many states, your utility is a vertically integrated monopoly. That means a single company handles generation, transmission, and distribution. It owns or operates power plants, moves electricity across high-voltage lines, and delivers it to your home. These utilities decide what mix of fuel sources to use for generating power, subject to approval from state regulators.
Other states have restructured (sometimes called deregulated) their electricity markets. In these states, the utility that delivers your power doesn’t generate it. Instead, separate companies produce electricity and sell it through competitive wholesale markets run by independent system operators (ISOs) or regional transmission organizations (RTOs). Your utility then purchases that electricity and handles the delivery, metering, and billing. In some restructured markets, you can even choose which company supplies your electricity, while the local utility still manages the physical delivery.
How Utilities Are Regulated
Because most people can’t choose their electric utility the way they’d choose a phone carrier, utilities are heavily regulated. State public utility commissions (PUCs) oversee investor-owned utilities and set the rates customers pay. The process is rigorous: a utility must present detailed evidence justifying its costs to operate and maintain its system. That evidence gets scrutinized through cross-examination and public input before any rate changes are approved.
Rate-setting typically happens in two phases. First, regulators determine the total amount of revenue a utility needs to keep the lights on, maintain infrastructure, and provide reliable service. Second, they decide how to divide that cost among different customer groups, such as residential, commercial, and industrial users. The goal is ensuring that rates are “just and reasonable” while giving the utility enough money to operate safely and reliably. For municipal utilities and co-ops, oversight comes from local government boards or member-elected boards rather than state commissions.
Where the Electricity Comes From
Globally, the fuel mix powering electric utilities is shifting, though fossil fuels still dominate. In 2024, coal remained the single largest source of electricity generation worldwide at 35% of the total, a position it has held for more than 50 years. Natural gas was second, providing over 20% of global electricity for more than two decades running. Oil-fired plants contributed only a small percentage.
Renewables collectively accounted for one-third of global electricity generation in 2024. Hydropower led at 14%, followed by wind at 8%, solar at 7%, and bioenergy at 3%. Nuclear power covered another 9%. For the first time ever, renewables and nuclear together supplied two-fifths of the world’s electricity. The mix varies significantly by region and by individual utility. Some utilities generate nearly all their power from renewables, while others still rely heavily on coal or natural gas.
Grid Modernization and Smart Technology
The basic model of generating power at a central plant and sending it one-way to customers is changing. Utilities are investing in what’s broadly called “smart grid” technology: two-way communication systems, advanced sensors, and computer-controlled equipment that make the grid more responsive and resilient. Digital meters automatically report outages and give customers better information about their energy use. Automated switches can reroute power around a problem area without waiting for a repair crew. Battery storage systems capture excess energy and release it later when demand spikes.
These upgrades matter because the grid is handling more complexity than ever. Rooftop solar panels send electricity back onto the grid. Electric vehicles create new demand patterns. Extreme weather events stress aging infrastructure. Smart grid technology helps utilities manage all of this in real time, keeping power reliable even as the system evolves. At the federal level, the Department of Energy supports research into advanced technologies like solid-state transformers, power flow controllers, and data analytics tools that help operators predict and respond to problems before they cause outages.