The Agua Fria Watershed (HUC 15070102) is located in north-central Arizona and covers an area of approximately 2,868 square miles. The watershed is characterized by a semi-arid climate, with most precipitation occurring during the winter months. The Agua Fria River is the primary hydrological feature of the watershed, flowing 120 miles from its headwaters in the Bradshaw Mountains to its confluence with the Salt River. The watershed is also home to several reservoirs, including Lake Pleasant, which serves as a major source of drinking water for the Phoenix metropolitan area. Snowpack in the watershed is often scarce and unreliable, with most precipitation falling as rain. Interesting climatic trends in the watershed include increasing temperatures and decreasing precipitation in recent years, which may have implications for both water availability and wildfire risk.