Lower Sulphur Watershed - 11140302

Home to approximately 32,000 Arkansans (2000 Census), the Lower Sulphur watershed lies within the Red River Basin in Southwest Arkansas crossing into Texas.  The hydrologic unit code for this watershed is 11140302.  Upstream are the Sulphur Headwaters (Texas), and the White Oak Bayou (Texas).  The McKinney-Posten Bayous (11140201) are downstream.

State-Level Map - Lower Sulphur Watershed-Level Map - Lower Sulphur Watershed Land Use Map - Lower Sulphur
County Pages
(Contact Information)
Major Streams 2006 Land Use
(177 Square Miles)
  • Cypress Creek
  • Days Creek
  • Sulphur River
  • Forest: 60.1%
  • Grassland: 19.1%
  • Transitional: 9.2%
  • Suburban: 5.5%
  • Water: 2.4%
  • Cropland: 1.8%
  • Urban: 1.4%

Data Source: CAST

Lower Sulphur 303d Impaired Streams (what is an impaired stream?)


More Watershed-Related Information


  • Clean Water Act Section 303(d) Impaired Waters Data Update here
  • Arkansas’s Final/ Draft Impaired Waterbodies – 303(d) List by Year here
  • AR Water Newsletter, Summer, 2015 here
  • NPS Management Plan here
  • The projects presented at the 2015 annual NPS conference are located here

Interactive Map

Interactive Watershed Viewer
Explore your county or watershed with this flash-based interactive map.  View over 25 geographic and water-related layers. Open Interactive Watershed Viewer.