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1  7-Day 10-Year Low Flow Maps

These maps provide information on low flow conditions that might be expected to occur only during droughts (once in 10 years), and associated effluent discharges, water withdrawals, and flow regulations for most Illinois rivers and streams.

2  Agricultural Research Service (ARS) Water Data Base

Collection of precipitation and streamflow data from small agricultural watersheds - Illinois locations: Elmwood, Edwardsville, Monticello.

3  Cass County Water Data

The USGS National Water Information System provides real-time and historical data on surface water flow, ground water levels, and water quality of streams in the US.

4  Champaign County Water Data

The USGS National Water Information System provides real-time and historical data on surface water flow, ground water levels, and water quality of streams in the US.

5  Christian County Water Data

The USGS National Water Information System provides real-time and historical data on surface water flow, ground water levels, and water quality of streams in the US.

6  Cox Creek (Station 202) Discharge Data

Discharge data files available in comma-delimited or graphical format

7  Cox Creek (Station 202) Nutrient Data

Nutrient concentration data files available in comma-delimited or graphical format

8  Cox Creek (Station 202) Sediment Data

Suspended sediment concentration data files available in comma-delimited or graphical format

9  Cox Creek (Station 202) Stage Data

Stage data files available in comma-delimited or graphical formats

10  Dewitt County Water Data

The USGS National Water Information System provides real-time and historical data on surface water flow, ground water levels, and water quality of streams in the US.

11  Flood Discharge Database

FEMA-published and selected other statistical flood discharge values, searchable by watershed or county.

12  Ford County Water Data

The USGS National Water Information System provides real-time and historical data on surface water flow, ground water levels, and water quality of streams in the US.

13  Hydrologic Units of Illinois

This map provides the USGS level 8 Hydrologic Unit Codes (HUC 8s) for Illinois watersheds.

14  Illinois Water Quality

EPA maintained website with links to all Illinois watershed water quality summary reports dating back to 1996.

15  Imperial Valley and Cook County Precipitation Network Data

data from rain gauge arrays operated by the Illinois State Water Survey

16  Instantaneous Suspended Sediment Data

The Benchmark Sediment Monitoring Program offers weekly data from suspended sediment samples collected at fifteen sampling sites throughout Illinois. Available in HTML and .csv formats.

17  Logan County Water Data

The USGS National Water Information System provides real-time and historical data on surface water flow, ground water levels, and water quality of streams in the US.

18  Lower Illinois River Basin Aerial Photographs

Photo mosaics, close-ups, and oblique angle photos of river features.

19  Lower Illinois River Basin: Sediment and Discharge

Graphic depicting sediment and discharge levels throughout the Lower Illinois River channel.

20  Lower Sangamon Watershed Profile

Environmental Protection Agency website containing numerous links to environmental data about the Lower Sangamon watershed.

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