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Geographic Information System (GIS) Data

A geographic information system (GIS) is a system for capturing, storing, analyzing and managing data and associated attributes which are spatially referenced to the earth. In the strictest sense, it is a computer system capable of integrating, storing, editing, analyzing, sharing, and displaying geographically-referenced information. In a more generic sense, GIS is a tool that allows users to create interactive queries (user created searches), analyze the spatial information, edit data, maps, and present the results of all these operations.

Potable Water Supply Well Survey GIS Data

In order to meet the regulatory requirements set forth in 35 Illinois Administrative Code (Ill. Adm. Code) 732.300(b)(1)(A)(1) and (2), 35 Ill. Adm. Code 734.445(a)(1) and (2), 35 Ill. Adm. Code 1600.210(b)(1) and (2), and any other rules or regulations requiring a Potable Water Supply Well Survey, the Bureau of Land accepts the use of the  Source Water Assessment Program for identification of potable water supply wells in lieu of contacting the following:

  1. Illinois EPA, Division of Water Supplies,
  2. Illinois State Geological Survey,
  3. Illinois State Water Survey, and
  4. Illinois Department of Public Health.

Please be reminded that local water supply and public health entities must still be contacted in performance of the well survey.

Disclaimer:  The Illinois EPA is authorized by both Federal and State law to compile and maintain certain information relating to various environmental programs, activities, conditions and sites within Illinois.  By providing this information, neither the State of Illinois nor any agency thereof nor any of their employees or officers make any representation of any kind as to whether any person, party or other entity herein identified or referred to in any way is subject to, in or out of compliance with, or has any rights or obligations pursuant to any law or regulation. Neither these databases, nor the information contained herein, is intended to create any rights or liabilities, substantive or procedural, enforceable by any party against the State of Illinois, or with respect to any real property referenced within the databases, and may not be relied upon by any person for that purpose.

Illinois EPA strives to ensure the site information is current, complete and correct.  Despite these efforts, errors and mistakes will occur and cannot be ruled out These databases and the information contained herein may be modified at any time to reflect additions to, deletions from, or other changes in the program without public notice.

To obtain additional site information, Illinois EPA advises the user to view information via link or request to view public files through the  Freedom of Information Act.