Agricultural runoff is the primary source of liquid waste pollution from dams and irrigation projects, as it contains fertilizers, pesticides, and other chemicals that can contaminate water sources.

Dams and irrigation projects contribute to the increase in liquid waste pollution by creating reservoirs that trap pollutants, diverting water away from natural wetlands that would otherwise filter pollutants, and increasing the use of fertilizers and pesticides in agriculture.

Liquid waste from dams and irrigation projects can contain a variety of pollutants, including nitrogen and phosphorus compounds, heavy metals, pesticides and herbicides, and other toxic chemicals.

Liquid waste pollution from dams and irrigation projects can have a range of negative impacts on aquatic ecosystems, including causing eutrophication and algal blooms, harming fish and other aquatic organisms, and contaminating drinking water sources.

A combination of strategies can be used to reduce liquid waste pollution from dams and irrigation projects, including implementing best management practices in agriculture, improving wastewater treatment facilities, and restoring natural wetlands.