Project ID



Nonpoint source pollution has been increasingly recognized as a major cause of reduction in water quality. Nationally, agricultural runoff accounts for approximately 46% of sediment, 47% of total phosphorus, and 52% of total nitrogen discharged into waterways; in Iowa, these percentages are much higher. Sediment is the greatest overall polluter nationwide, affecting nearly all components of aquatic ecosystems.

Principal Investigator(s)

Kurt W. Pontasch

Year of Grant Completion