Rivers, lakes and streams

Colorado has more than 105,344 river miles and more than 249,787 lake acres.The majority of the state’s rivers originate in the pristine high alpine environment of the Rocky Mountains and flow downstream through the high desert or high plains regions before leaving the state.Colorado has seven major river basins -Arkansas,Colorado,Green,Platte,Republican,Rio Grande and San Juan.

Data and regulation Information

How to obtain data and data submission forms.

Studies from the measurable results program


Monitoring plans, trophic definitions, status, data and data collection, temperature analysis program and contact information

Nonpoint source pollution management

Funding, program documents, planning, project management, monitoring and assessment, outreach, Regulation 85


Nutrient management control regulations, 10-year roadmap, incentive program, workgroup activities, monitoring, nutrients management grants

Surface water assessment - 303(d) listing methodology, assessment methods and tools