Freedom of Information Act

Access to Agency Information

The Illinois EPA has launched an online tool created to improve transparency and public access to Agency documents. The public can access the IEPA Document Explorer to search more than 26,000 sites/facilities for:

  • Air construction and operating permits;

  • National Pollution Discharge Elimination System (NPDES) water discharge permits;

  • Leaking Underground Storage Tank (LUST) technical documents;

  • Site Remediation Program (SRP) technical documents; and

  • State Response Action Program sites technical documents.

Through IEPA Document Explorer, businesses and the public can search for locations of interest by site name; location address and/or program ID; or by a geographic mapping tool for 475,000 documents consisting of more than 13.5 million pages.

The public may access environmental information by submitting a request pursuant to the Illinois Freedom of Information Act (FOIA) ( 5 ILCS 140). The Agency’s corresponding rules (“Access to Public Records of the Illinois Environmental Protection Agency”, 2 Ill. Adm. Code 1828) provide the framework by which Illinois EPA public records may be requested, accessed, inspected, and duplicated.

Your request for environmental information must be submitted through the following means: the interactive FOIA Request Web Form provided, or through fax, the US mail or special carrier.

Due to upgrades with the FOIA Request Web Form, the Agency requires, as of October 21, 2015 that FOIA requesters create an account to submit requests. More information can be found in the "Why must I register" FAQ topic.

Illinois EPA Records

Illinois EPA public records are primarily maintained by location, site/facility name, or project. Furthermore, these records are subdivided into categories reflecting the relevant Agency program, or document type. Consequently, it is important to provide as much specific information as possible when requesting information through FOIA. In addition, Illinois EPA public records are maintained in various media including paper, microfilm, digital image, and computerized records.

Access to, or copies of public records may be obtained through FOIA by several methods including an on - site records review at Agency Headquarters, Agency duplication (fees may be assessed) and mailing, or use of a copy contractor by the requester to perform duplication. The appropriate method will depend upon the type of media in which the requested records are maintained and the quantity of records requested. Likewise, any fees that may be assessed will vary with the type of media and the quantity of records requested.

For more information on FOIA and how to request information under FOIA, see the Frequently Asked Questions (FAQs).

Commonly Sought Information


Right-to-Know (RTK) laws require notification to inform individuals and the community in a timely manner when contamination poses a risk to the public. The public can access RTK notification documents through the RTK webpage