About The Illinois State Water Survey

Illinois Water Inventory Program

Irrigation Reporting Information

In 2010, the Illinois Water Use Act was amended to make reporting for all high capacity wells or intakes mandatory in Illinois, including agricultural irrigation. Ag irrigation was given five years to comply, which means that starting with 2015, irrigators are required to report their water use from both wells and surface water intakes. A high capacity well/intake is defined as a single point of withdrawal or a series of points that together pump more than 70 gallons per minute.

Irrigators can provide an actual number of gallons pumped, if using a flow meter, or The Water Use Act of 1983 states they can estimate their water withdrawals using a method approved by the ISWS. The ISWS has identified two estimation methods that are both simple to use and don’t require a lot of effort by irrigators:

  1. The acre-inches method – Number of inches applied x acres x 27150 gallons per acre-inch
  2. The hours-flowrate method – Number of hours ran x rated gallons per minute of system x 60min/hr

The irrigation handbook available on this webpage includes forms and provides guidance on what an irrigator needs to do now and during the year for recordkeeping, calculating, and reporting irrigation water use for the 2015 growing season. All of the forms are also downloadable below as fillable PDFs, which can be filled out electronically and then printed once filled in. Online reporting will be available by October 2015, which will allow you to report through a dedicated web application, instead of printing and mailing in a paper form. If you prefer, paper forms can be downloaded from this website, printed, filled out with pen, and mailed in. We will also encourage local extension and farm bureau offices to keep copies of the handbook and forms on hand.

Locations of each withdrawal point are a critical part of the data collected by the ISWS. Irrigators are asked to provide an accurate location of each well and intake. A short video tutorial is provided below that demonstrates an easy method of determining the coordinates of your well using Google Maps. There is also an example in the handbook, or you can call the ISWS for assistance, contact information is below. Once you have registered and receive a facility ID, the online system will automatically add your well information to the reporting form for you.

Irrigation Reporting HandbookIrrigation Handbook (pdf ~6mb) – explains the program, provides forms and examples of how to fill them out. (Read this first)

These individual forms are also included in the handbook listed above:

These forms include formulas for automatic calculations. Please save a copy to your computer, and fill out your saved copy. Filling out an unsaved form may affect the format of the document.


Email forms to: isws-iwip@isws.illinois.edu or

Mail to:

Illinois State Water Survey
IWIP Reporting
2204 Griffith Dr.
Champaign, IL 61820-7463

Registration Form (pdf ~92k) - a fillable form that can be printed and mailed in.

Reporting Form (pdf ~65k) - fillable form for reporting total gallons used from each well or intake, due at the end of each year.

Flowmeter Data Sheet (pdf ~100k) - form you can use to track gallons pumped during the irrigation season from a totalizing flow-meter that will calculate total gallons.

Acre-Inches Data Sheet (pdf ~100k) - form that helps you track the number of inches applied to each field during the irrigation season that will calculate total gallons

Rated Gpms-Hours Data Sheet (pdf ~90k) - form that helps you track the total hours ran for an irrigation system during the irrigation season that calculates total gallons pumped, assuming you know the rated gallons per minute your system pumps.

Irrigation Handout (pdf ~260k) - one page explanation to pass out to irrigators that includes this website URL.

2012 and 2014 Center Pivot Irrigation in Illinois (pdf ~21.2mb) – This map displays center pivot irrigation systems in use in Illinois during the 2012 growing season. The saturated hydraulic conductivity layer represents soils with a value of ≥ 10 micrometers per second in the upper 30 inches of soil, a value typical of sandy soils in Illinois. Saturated hydraulic conductivity is a measure of the ease with which water will move through a  soil, and values typically increase with the sand content.


Steve Wilson – ISWS, Groundwater Hydrologist, 217-333-0956, sdwilson@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 State Water Survey

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