| Water Quality - Excessive Sediment in Surface Water | $8,015,831 |
| Water Quality - Excess Pathogens and Chemicals from Manure, Bio-solids or Compost Applications in Surface Water | $6,238,194 |
| Water Quality - Nutrients in Surface water | $5,984,616 |
| Water Quality - Salts in Groundwater | $4,705,886 |
| Water Quality - Salts in Surface Water | $4,465,714 |
| Water Quality - Pesticides in Surface Water | $3,226,840 |
| Water Quality - Excess Pathogens and Chemicals from Manure, Bio-solids or Compost Applications in Groundwater | $2,607,058 |
| Water Quality - Petroleum, Heavy Metals and Other Pollutants Transported to Groundwater | $2,239,642 |
| Water Quality - Pesticides in Groundwater | $2,036,860 |
| Water Quality - Petroleum, Heavy Metals and Other Pollutants Transported to Surface Water | $1,561,131 |
| Water Quality - Nutrients in Groundwater | $1,278,976 |
Fooling Ourselves
Boondoggle:
Iowa's Low Hanging Fruit:
Washout Revisited:
Broken Stream Banks:
Pumped up: