The Nation's rivers, lakes, and groundwater sources provide water for industry, agriculture, residential uses and recreation, as well as support a diversity of ecosystems. Increased demands from an expanding population, industrial growth, increases in agricultural production and ecosystem management have resulted in localized, temporal shortages of available water. Agriculture is the single largest water user. Effective water management will work with agricultural interests to address the replacement of inefficient irrigation methods by modern science-based water saving techniques, efficient nutrient and pesticide application, and strategic implementation of run-off controls.

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Adapted from the Water Policy and Economics Theme page: http://www.usawaterquality.org/themes/policy/default.html