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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  Bureau 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.

3  Court Creek (Station 301) Discharge Data

Discharge data files available in comma-delimited or graphical format

4  Court Creek (Station 301) Nutrient Data

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

5  Court Creek (Station 301) Sediment Data

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

6  Court Creek (Station 301) Stage Data

Stage data files available in comma-delimited or graphical formats

7  Flood Discharge Database

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

8  Fulton 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.

9  Haw Creek (Station 303) Discharge Data

Discharge data files available in comma-delimited or graphical format

10  Haw Creek (Station 303) Nutrient Data

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

11  Haw Creek (Station 303) Sediment Data

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

12  Haw Creek (Station 303) Stage Data

Stage data files available in comma-delimited or graphical formats

13  Henry 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.

14  Hydrologic Units of Illinois

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

15  Illinois Water Quality

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

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  Knox 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  Marshall 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.

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