South Carolina Code of Regulations
Chapter 61 - DEPARTMENT OF HEALTH AND ENVIRONMENTAL CONTROL
Subchapter 61-69 - Classified Waters
Section 61-69.B - Tributaries to Classified Waters

Where surface waters are not classified by name (unlisted) in this regulation, the use classification and numeric standards of the class of the stream to which they are tributary apply, disregarding any site-specific numeric standards for the named waterbody. In tidal areas, where an unlisted tributary may affect or flows between two differently classified waterbodies, regardless of whether the location is upstream or downstream, the more stringent numeric standards of the classified waters apply to the unlisted tributary, disregarding any site-specific numeric standards for those waterbodies.