In the western United States, the management of surface water quality and quantity is highly compartmentalized. This compartmentalization among and within state and federal authorities is not inherently objectionable. To the contrary, it likely is necessary. Yet, the degree of compartmentalization appears to have so divided management of this resource that damage has been done to both sides. Opportunities exist for cooperation, coordination, and a more holistic perspective on water management with little or even no change in law.