The primary impact of nitrogen pollution on aquatic systems is the occurrence of eutrophication, which leads to excessive algal blooms. These blooms deplete oxygen in the water and can create dead zones where aquatic life cannot survive. This process also affects water quality and disrupts aquatic ecosystems, ultimately threatening biodiversity and fish populations. Moreover, the economic implications include decreased fisheries productivity and increased water treatment costs. Reducing nitrogen runoff is crucial to maintaining healthy aquatic environments and supporting sustainable fisheries.