Rock River

ISWS has completed a water supply study of the Rock River region, which includes Jo Daviess, Stephenson, Winnebago, Boone, Carroll, Ogle, Whiteside, Lee, Rock Island, Henry, and Bureau counties. Most of the region can use groundwater resources from two major aquifer systems: (1) sands and gravels, primarily in the Green River Lowlands; and (2) the Cambrian-Ordovician sandstone aquifer system, which ranges widely in depth in the region. Some smaller water supplies in this region also draw from shallower Silurian-Devonian or Galena Platteville bedrock.

Please note that all analyses on this page and associated story maps are under review by the regional planning committee and should be considered as provisional.

Story Maps

• Regional Demands
• Supply and Demand: Visualizing Water Usage
• Hydrogeology of the Rock River Region
• Groundwater Resources in the Green River Lowlands
• Water Supply Planning for the Rockford Area
• Risk to Groundwater Supplies in the Rock River Region
• Water Quality of the Rock River Water Supply Planning Region
• Water Quality of Springs in the Driftless Region of Illinois
• Surface Water Studies in the Rock River Region
• Supply and Demand: Visualizing Water Usage
• Risk to Groundwater Supplies in the Rock River Region

Report

Assessment of water resources for water supply in the Rock River region