Water Supply Planning
The Illinois State Water Survey (ISWS) leads water supply planning in Illinois by estimating current and future water availability and demand. We work with partners, especially the Illinois Department of Natural Resources (IDNR), to identify water supply options that support long-term planning and sound decision-making.
Explore Planning Regions
Illinois has ten unique Water Supply Planning regions and one subregion that organize planning work across the state. Explore regional boundaries, county coverage, and planning status for each region or subregion.
Water Use Reporting | IWIP
Do you operate a high-capacity well or surface water intake in Illinois? Operators of these systems are required to report annual water withdrawals through the Illinois Water Inventory Program (IWIP).
Explore IWIPInteractive Water Use Maps
Visualize some of IWIP’s statewide water use data for Illinois’ agricultural and public water sectors.
Online Tools
Read more about ISWS tools to explore water supply and demand estimates, drought risk, and streamflow across Illinois.