Wetlands are constructed or created for a variety of reasons, including storm water management, non-point source pollution control, and aesthetics. Constructed wetlands are used widely in both urban and agricultural settings to improve water quality, however evaluations of the long-term performance of artificial wetlands are sparse. ^ Evaluation of the performance of constructed wetlands in agricultural, urban, and commercial settings in West Lafayette, Indiana over approximately four years has focused on their performance in treating surface water runoff for nutrients. In the urban setting an average of > 50% of the total mass load of nitrate is due to atmospheric deposition. The trap efficiency of a wetland adjacent to a retail parking [...]