Map of Study Location

• Objectives:
  Determine long-term changes in the quality of ground water in the South Platte alluvial (ground water adjacent to the stream) aquifer underlying corn crop areas.
  
  
  Determine how ground-water quality has changed in response to changes in agricultural management practices.
  

• Approach:
  
  Resample 30 wells for targeted physical and chemical data.

• Timing:
  
  Initial sampling occurred in the summer of 1994. The second round of sampling occurred in the summer of 2002.

• Targeted Physical and Chemical Data:
  
  Physical parameters, nutrients, pesticides, organic carbon, trace elements, and major ions.