Category: 🏛 Organizations & Roles
Complexity Level: ●●○○○ (Level 2 – Operational Overview)
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Local Distribution Companies (LDCs) are the utilities responsible for delivering electricity from the high-voltage transmission system to homes, businesses, and industries within local communities.
They operate the distribution system, which includes the lower-voltage wires, transformers, and substations that carry electricity to end users.
LDCs represent the final step in the electricity value chain before electricity reaches customers.
Local Distribution Companies deliver electricity from the bulk power system to end-use customers.
They are responsible for operating the local grid safely and reliably.
LDCs perform several important functions within the electricity system.
LDCs operate the distribution system, which includes:
This infrastructure delivers electricity from the transmission grid to individual buildings.
LDCs connect homes, businesses, and industrial facilities to the electricity system.
They are responsible for:
LDCs measure electricity consumption using electricity meters.
Many customers now use interval metering systems that record electricity use in short time intervals.
LDCs use this data to prepare electricity bills and manage electricity consumption information.
LDCs maintain the reliability of local electricity service by:
Reliable distribution systems are essential for delivering electricity safely to customers.
LDCs are regulated by the Ontario Energy Board (OEB).
The OEB oversees:
This regulatory framework ensures that electricity is delivered safely and at reasonable cost.
LDCs interact with several other organizations within the electricity sector.
| Organization | Role |
|---|---|
| Hydro One | Operates much of Ontario’s transmission network |
| Independent Electricity System Operator (IESO) | Operates the electricity market and coordinates system operations |
| Ontario Energy Board (OEB) | Regulates electricity utilities |
These organizations work together to maintain a reliable electricity system.
Ontario has dozens of LDCs serving different communities.
Examples include:
Each LDC serves a specific geographic service area.
Local Distribution Company (LDC)
A regulated electricity utility responsible for delivering electricity from the transmission system to end-use customers within a local service territory.
LDCs play a critical role in the electricity system because they:
As electricity systems evolve, LDCs are increasingly involved in integrating renewable generation, electric vehicles, and energy storage technologies.
➡ Next Topic:
Independent Electricity System Operator (IESO)
Understanding LDCs helps explain how electricity reaches consumers after being generated and transmitted across the grid.
The next topic explains the organization responsible for operating Ontario's electricity market and coordinating system operations.
Last Updated: 2026-03-26