Data Sources

Watershed management starts with good data. These resources provide scientific data that IRWP commonly uses to make management decisions: 

ADEQ's Water Quality Monitoring Database

Monitoring stations within the Upper IRW include: 

  • ARK007A: Barren Fork on County Road 21

  • ARK0141: Cincinnati Creek at Highway 244

  • ARK0010C: Clear Creek below Fayetteville

  • ARK0004A: Flint Creek near West Siloam Springs

  • ARK006: Illinois River at AR Highway 59

  • ARK0040: Illinois River near Savoy

  • ARK0082: Osage Creek at Logan

Other monitoring stations exist within the UIRW, but may either be inactive or were used for a temporary study. Please visit ADEQ's Aquaview for an interactive map of all stations. 


U.S. Geological Survey's Streamflow and Water Quality database:

Monitoring gages within the Arkansas side of the IRW include: 

  • 07195800: Flint Creek at Springtown

  • 07195855: Flint Creek at West Siloam Springs

  • 07195430: Illinois River south of Siloam Springs

  • 07195400: Illinois River at Highway 16 near Siloam Springs

  • 07194800: Illinois River at Savoy

  • 07194880: Osage Creek near Cave Springs

  • 07195865: Sager Creek near West Siloam Springs

  • 07194933: Spring Creek near Highway 112

  • 07195000: Osage Creek near Elm Springs

  • 07195500: Illinois River near Watts

  • 07196900: Barren Fork at Dutch Mills

  • 07194906: Spring Creek at Sanders Avenue in Springdale

  • 071948095: Mud Creek near Johnson


Monitoring gages within the Oklahoma side of the IRW include:

  • 07195855: Flint Creek at West Siloam Springs

  • 07195500: Illinois River near Watts

  • 07196000: Flint Creek at Kansas

  • 07196090: Illinois River at Chewey

  • 07197000: Barren Fork at Eldon

  • 07196500: Illinois River at Tahlequah

  • 07197360: Caney Creek at Barber

  • 07198000: Illinois River at Gore


Arkansas Water Resources Center

Bacteria Monitoring in the UIRW: Three year study of E. coli presence at twenty-nine sites.

UIRW Monitoring Project: Ten-year, long-term trend analyses of multiples water quality parameters at thirteen sites.