Water Resources: All surface and subterranean (subsurface) waters, including any stream, river, spring, wetland, lake, pond, snow pack, glacier, aquifer, and any other body of water, including seasonal water resources.

Water Use: Removing water from or otherwise reducing water in a water resource; storing water; impeding or diverting the flow of a water resource; polluting a water resource; discharging wastewater into a water resource; disposing or storing hazardous substance in a manner that may detrimentally impact a water resource; and, altering the beds, banks, course or characteristics of a water resource.

Wastewaters: Polluted waters discharged into a water resource.

Water Basin Management Plan: A comprehensive document on water management, which shall describe the management and conservation activities to be implemented within a water basin in order to achieve the objectives of this Code.

Monitoring of water resources: A regulated system of observations of hydrological, hydrogeological, hydrophysical and hydrochemical indices, which ensures collection and analyses thereof (and is a subject to dissemination).

Maximum Permissible Concentration (MPC): The amount of a harmful substance, the presence of which does not have a harmful effect on human health, neither result in unfavorable consequences.

Maximum Permissible Discharge (MPD): The normalized amount of discharge, which is established for point and (or) non-point pollution sources of water, taking into account characteristics of technological norms for discharges and background pollution of water resources.