The EPA's National Library Network consists of several varieties of libraries containing different types of collections and services, depending upon which part of the agency they are associated with. The Network includes information about protecting and managing the environment, and issues that often play a major legal role - pollution, hazardous waste, water safety, and others.
The collection can be accessed using the Online Library System (OLS), the EPA's online catalog that is available to the public. It has basic and advanced search options, as well as a Help page that explains how the OLS is structured and provides examples of searches. If an item is available electronically, it can be downloaded in PDF directly from its item record.
Another very useful database within the Network is the National Service Center for Environmental Publications (NSCEP), which contains more than 7,000 print and 40,000 digital EPA publications. And...they can all be ordered (if only available in print) or downloaded in PDF for free. Yes, FREE!