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Data Online- 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 Big Muddy Watershed Profile
- Environmental Protection Agency website containing numerous links to environmental data about the Big Muddy watershed.
- 3 Big Muddy Watershed Resource Links
- USGS maintained site with links to data, projects, and publications on HUC watersheds.
- 4 Big Muddy Watershed 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 CACHE RIVER AT FORMAN, IL - 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 Cache Watershed Profile
- Environmental Protection Agency website containing numerous links to environmental data about the Cache watershed.
- 7 Cache Watershed Resource Links
- USGS maintained site with links to data, projects, and publications on HUC watersheds.
- 8 Cache Watershed 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 Flood Discharge Database
- FEMA-published and selected other statistical flood discharge values, searchable by watershed or county.
- 10 Illinois Water Quality
- EPA maintained website with links to all Illinois watershed water quality summary reports dating back to 1996.
- 11 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.
- 12 Johnson 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 Lower Ohio Watershed Profile
- Environmental Protection Agency website containing numerous links to environmental data about the Lower Ohio watershed.
- 14 Lower Ohio Watershed Resource Links
- USGS maintained site with links to data, projects, and publications on HUC watersheds.
- 15 Lower Ohio Watershed 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.
- 16 Lower Ohio-Bay Watershed Profile
- Environmental Protection Agency website containing numerous links to environmental data about the Lower Ohio-Bay watershed.
- 17 Lower Ohio-Bay Watershed Resource Links
- USGS maintained site with links to data, projects, and publications on HUC watersheds.
- 18 Lower Ohio-Bay Watershed 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.
- 19 National Weather Service: River Watch, Mississippi River Basin
- Illinois River 5-day stage forecasts for three main river segments: Morris to LaSalle, Henry to Beardstown, and New LaGrange to Hardin. Includes links to Upper Mississippi Basin stage forecasts.
- 20 Illinois County Boundaries, Polygons and Lines
- GIS data - zipped shapefile
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