5 Colo. Code Regs. § 1002-39.2
Salinity or total dissolved solids (TDS) occurs at low concentrations in the headwaters of the Colorado River and its tributaries in Colorado; however, salinity concentrations increase downstream. The primary effects of salinity occur in the lower Colorado River basin. This is largely due to the higher levels of salinity and the type of crops grown there. Since total dissolved solids are conservative constituents which affect certain water uses in the lower Colorado River basin, and in order to utilize the most effective control methods, a basin-wide approach for controlling salinity is being followed.
The seven states through which the Colorado River runs formed the Colorado River Basin Salinity Control Forum ("Forum") to coordinate the basin-wide approach. The Forum gathers and reviews information relevant to the complex problem of salinity standards and implementation of controls by the basin states. Colorado, as a member of the Forum, will work with the other basin states and the federal government to manage salinity and its effects through this basin-wide effort.
5 CCR 1002-39.2