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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 Calhoun 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 Flood Discharge Database
- FEMA-published and selected other statistical flood discharge values, searchable by watershed or county.
- 4 ILLINOIS RIVER AT HARDIN, 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.
- 5 Illinois Water Quality
- EPA maintained website with links to all Illinois watershed water quality summary reports dating back to 1996.
- 6 Lower Illinois River Basin Aerial Photographs
- Photo mosaics, close-ups, and oblique angle photos of river features.
- 7 Lower Illinois River Basin: Sediment and Discharge
- Graphic depicting sediment and discharge levels throughout the Lower Illinois River channel.
- 8 Lower Illinois Watershed Profile
- Environmental Protection Agency website containing numerous links to environmental data about the Lower Illinois watershed.
- 9 Lower Illinois Watershed Resource Links
- USGS maintained site with links to data, projects, and publications on HUC watersheds
- 10 Lower Illinois 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.
- 11 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.
- 12 NAWQA Data Warehouse
- Searchable database of National Water Quality Assessment data.
- 13 Peruque-Piasa Watershed Profile
- Environmental Protection Agency website containing numerous links to environmental data about the Peruque-Piasa watershed.
- 14 Peruque-Piasa Watershed Resource Links
- USGS maintained site with links to data, projects, and publications on HUC watersheds.
- 15 Peruque-Piasa 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 The Sny Watershed Profile
- Environmental Protection Agency website containing numerous links to environmental data about the Sny watershed.
- 17 The Sny Watershed Resource Links
- USGS maintained site with links to data, projects, and publications on HUC watersheds.
- 18 The Sny 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 1993 Mississippi River Flood Hazard Mitigation Grant Program
- 1993 Mississippi River flood maps that show properties damaged in the event.
- 20 Ammonia-N Concentrations in the Illinois River Watershed
- Thematic map showing the mean total Ammonia-N for each of the major sub-watersheds.
- Download Options: LoRes preview | HiRes (624 K) | Metadata
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