Table of Contents
The Environmental Information Exchange Network (Exchange Network) is a secure, Internet-based approach to exchanging data among partners (e.g., states and EPA). Using eCommerce technologies, data standards and agreed-upon templates for packaging data, Exchange Network participants control and manage their own data, while making it available to partners via requests over a secure Internet connection.
You may also want to read some history about what is known today as the Environmental Information Exchange Network here.
There are a number of documents and presentations that were created to answer this question in detail, such as the Exchange Network Blueprint Report and Exchange Network Nodes at a Glance. Although some of these documents are dated, due to specification changes, they can still be a valuable resource in understanding the evolution of the Exchange Network.
The diagram below depicts the basic structure of the Exchange Network
