---
title: What is PJM Interconnection?
description: PJM Interconnection is the regional transmission organization (RTO) that operates the electric power grid for the Mid-Atlantic region and parts of the Midwest. PJM is responsible for coordinating the movement of wholesale electricity, maintaining grid reliability, and administering regional electricity markets across its service territory.
---

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# What is PJM Interconnection?

## PJM Interconnection is the regional transmission organization (RTO) that operates the electric power grid for the Mid-Atlantic region and parts of the Midwest. PJM is responsible for coordinating the movement of wholesale electricity, maintaining grid reliability, and administering regional electricity markets across its service territory.

#### **What area does PJM serve?**

PJM’s service area includes all or portions of multiple states across the **Mid-Atlantic and Midwest**.

A map of PJM’s service area is shown below.

![20160112-current-territory-served.gif](https://help.srecs.solsystems.com/servlet/rtaImage?eid=ka03l000000HbOA&feoid=00N3l00000Qctse&refid=0EM3l0000094Pcf)

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