Major River Basins
Rivers are the predominant water source for Coloradans. This water is highly prized because it starts as pristine high-quality snowmelt, not yet used and reused by others. Other states are not so fortunate.
Colorado has nine major river basins, which include the Arkansas, Colorado, Gunnison, North Platte, Republican, Rio Grande, South Platte, Dolores/San Juan/San Miguel, and the Yampa/White/Green. Each basin relies on a mixture of rain, snow and groundwater to fill its rivers and creeks. Likewise, each basin hosts a distinct range of water uses that help shape Colorado’s overall identity.
Learn more about Colorado’s nine unique river basins, where the water flows from the headwaters to the state line, how the water is stored and used, and what compacts govern the use of each basin.