About The Illinois State Water Survey

Groundwater Science

Illinois Water Inventory Program


The Illinois Water Inventory Program is still operational.

Although University offices are closed due to the Governor’s shelter-in-place order, the Illinois Water Inventory Program team is still available to answer calls and emails to support 2019 water use reporting.

The Online Reporting Tool is operational, and IWIP is accepting 2019 water use reporting, as well as any other outstanding years' reports.

Please note that mail services to our offices are suspended. Consequently, some normal IWIP functions will be delayed, such as mailing of notification postcards. IWIP staff will be sending reminder emails instead and will follow-up with facility contacts by phone to remind them to submit annual water use reports. If you mail your IWIP response, we recommend that you also call or email to let IWIP staff know you have submitted your response.

We acknowledge that some of you may be experiencing additional workload and changes in your own business practices, so please let us know if you need more time to report or extra assistance in generating your annual water user report. Be assured we are available to help, and please contact us with any questions you may have.

If you have any questions about IWIP, about 2019 water use reporting, or about ISWS operations, we encourage you to send us an email at ISWS-IWIP@isws.illinois.edu or call us on our main phone line: 217-333-0239. IWIP staff members are working, and will respond to your inquiries as soon as possible.

The Illinois Water Inventory Program staff would like to thank you for your patience and cooperation.

For more information on COVID-19, see: http://wateroperator.org/coronavirus

About the Water Inventory Program

The Illinois Water Inventory Program (IWIP), founded in 1978, is a statewide inventory of water use and withdrawals in Illinois. The priority is to develop and maintain a database of high-capacity water wells and intakes from public water supplies, self-supplied industries, irrigation, fish and wildlife, and conservation.

A high-capacity well or intake is any well or intake that is rated to pump 70 gallons per minute (gpm) or greater. In addition, any facility which owns or operates multiple wells or intakes that when combined are rated to pump 70 gpm is classified as a high-capacity operation.

For each water-using facility inventoried, the database includes locations and amounts of water withdrawn from surface water and groundwater sources, as well as significant amounts of water purchased from other facilities. Data can be summarized geographically by county, township, and drainage basin, as well as by various water use and water source categories for inclusion in publications of the USGS National Water Use Program. Annual submission of the Illinois Water Inventory form is mandatory according to Public Act 096-0222 .

Registration and Annual Reporting

Agricultural Irrigation Facility Reporting

Irrigation Reporting Information is now available online. The webpage provides the following information:

  • A downloadable irrigation handbook which includes forms and guidance for record-keeping, calculating, and reporting irrigation water use.
  • Information on how to register an agricultural irrigation facility in IWIP
  • Help on calculating annual gallons of water withdrawals
  • Instructions on how to report water use information.

Please note, IWIP considers an Agricultural Irrigation facility to be a crop irrigation facility which typically irrigates with a center pivot irrigation system. This does not include golf courses or nursery facilities.

Public Water Supply and Industrial-Commercial Facility Reporting

Public Water Supply and Industrial-Commercial facilities will receive a postcard notification in the mail in early March of 2020, with instructions on how to report the previous year’s water use and withdrawals data.

Lake Michigan Ordinance (LMO-2 Recipients): Facilities that have a Lake Michigan allocation are required to submit a form (the LMO-2) to the Department of Natural Resources’ Office of Water Resources in Chicago. LMO facilities must still report Water Use Information to IWIP, however these facilities may report water use on the previous federal water year, which runs from October 1 through September 30.

Please note golf courses and nurseries are considered to be Industrial-Commercial facilities, and not Agricultural Irrigation facilities as defined by IWIP. As such, these facilities should have been reporting to IWIP annually since 2010.

Online Reporting

IWIP reporting can now be done online via the IWIP Online Reporting Tool.

To use the tool, facility operators must first register an account with IWIP staff, and receive a unique Username and Password. To begin this process please send an email containing facility name, facility number (if known) and your contact information to ISWS-IWIP@isws.illinois.edu

If you already have a Username and Password for your facility, you can access the online tool for your facility type with the links below:


Public Water Supplies Online Reporting

Industrial-Commercial Online Reporting

Note: Golf courses and nurseries should report using the Industrial-Commercial link above, as they are defined as Industrial-Commercial facilities by IWIP. If you are unsure of your facility's classification, please contact IWIP staff.

Agricultural Irrigation Online Reporting


If you would like more assistance please feel free to contact IWIP staff via phone at 217-333-0239.

Data Use

See examples of how IWIP data are used in State Water Survey projects and beyond.

For Further Information

Please see our Frequently Asked Questions section first; you may find an answer to your questions there.

If you have any additional questions about completing some part the form or determining the amount of water your facility purchases or withdraws, please do not hesitate to call the IWIP office at 217-333-0239 or e-mail ISWS-IWIP@isws.illinois.edu. Office hours are 8-12 and 1-5, Monday through Friday.

Mailing Address:

Illinois Water Inventory Program
Illinois State Water Survey
2204 Griffith Drive
Champaign, IL 61820-7463

Phone: 217-333-0239


If you have a more specific request, IWIP staff contact information is listed below:

Wayne Ryan – ISWS, IWIP Academic Research Assistant, 217-300-7315, wcryan@illinois.edu
Cora Wessman – ISWS, IWIP Academic Research Assistant, 217-300-7328, cwessm3@illinois.edu
Alison Meanor – ISWS, IWIP Irrigation Data Coordinator, 217-265-8634, ameanor@illinois.edu
Conor Healy – ISWS, IWIP Program Coordinator, 217-244-9674, healy19@illinois.edu

Illinois Water Inventory Program Staff thank you for participating in this important state-wide program.

Illinois State Water Survey

2204 Griffith Dr., MC-674
Champaign, IL 61820-7463
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