WS-IV

Water Supply IV Watersheds

Waters used as sources of water supply for drinking, culinary, or food processing purposes for those users where a WS-I, WS-II, or WS-III classification is not feasible. WS-IV waters are generally located within moderately to highly developed watersheds.

CRITICAL AREA

• Dischargers:  Domestic and Industrial
  
• Allowable Development:
  
  • Low Density Option:  2du/ac or 24% built-upon area
    
  • High Density Option*:  24-50% built-upon area
                (* Required to control the 1" storm)
• 10/70 Provision:  Not allowed
  
• Residuals application:  No new sites
  
• Landfills:  No new landfills
  
• Agriculture BMPs:  Required
  

PROTECTED AREA

• Dischargers:  Domestic and Industrial
  
• Allowable Development:
  
  • Low Density Option:  2du/ac or 24% built-upon area
    
  • High Density Option*:  24-70% built-upon area
                (* Required to control the 1" storm)
• 10/70 Provision:  Allowed
  
• Residuals application:  Allowed
  
• Landfills:  Allowed
  
• Agriculture BMPs:  Not required
  

Link to Summary Table of Water Supply Watershed Classifications

Link to Frequently Asked Questions (FAQs)

Return to the Water Supply Watershed Protection Program Home Page

     
http://h2o.enr.state.nc.us/wswp/WS-4.html    (Last Updated:   August 1, 1999)    Webmaster