| Water Quality - Salts in Groundwater | $6,496,794 |
| Water Quality - Nutrients in Surface water | $5,619,226 |
| Water Quality - Excessive Sediment in Surface Water | $5,294,928 |
| Water Quality - Excess Pathogens and Chemicals from Manure, Bio-solids or Compost Applications in Surface Water | $4,969,644 |
| Water Quality - Excess Pathogens and Chemicals from Manure, Bio-solids or Compost Applications in Groundwater | $4,042,402 |
| Water Quality - Nutrients in Groundwater | $3,534,259 |
| Water Quality - Salts in Surface Water | $3,525,984 |
| Water Quality - Petroleum, Heavy Metals and Other Pollutants Transported to Groundwater | $3,248,058 |
| Water Quality - Pesticides in Groundwater | $3,115,137 |
| Water Quality - Pesticides in Surface Water | $2,925,365 |
| Water Quality - Elevated Water Temperature | $887,227 |
| Water Quality - Petroleum, Heavy Metals and Other Pollutants Transported to Surface Water | $589,706 |
Fooling Ourselves
Boondoggle:
Iowa's Low Hanging Fruit:
Washout Revisited:
Broken Stream Banks:
Pumped up: