| Water Quality - Excessive Sediment in Surface Water | $775,229 |
| Water Quality - Elevated Water Temperature | $377,746 |
| Water Quality - Petroleum, Heavy Metals and Other Pollutants Transported to Surface Water | $129,434 |
| Water Quality - Nutrients in Groundwater | $106,436 |
| Water Quality - Pesticides in Groundwater | $101,825 |
| Water Quality - Nutrients in Surface water | $91,045 |
| Water Quality - Petroleum, Heavy Metals and Other Pollutants Transported to Groundwater | $78,903 |
| Water Quality - Salts in Surface Water | $75,887 |
| Water Quality - Pesticides in Surface Water | $64,463 |
| Water Quality - Salts in Groundwater | $28,631 |
| Water Quality - Excess Pathogens and Chemicals from Manure, Bio-solids or Compost Applications in Groundwater | $15,785 |
| Water Quality - Excess Pathogens and Chemicals from Manure, Bio-solids or Compost Applications in Surface Water | $11,004 |
Fooling Ourselves
Boondoggle:
Iowa's Low Hanging Fruit:
Washout Revisited:
Broken Stream Banks:
Pumped up: