(a) No person shall discharge or cause to be discharged any storm water, surface water, ground water, roof runoff, subsurface drainage, uncontaminated cooling water or unpolluted industrial process waters to any sanitary sewer.
(b) Storm water and all other unpolluted drainage shall be discharged to such sewers as are specifically designated as combined sewers or storm sewers, or to a natural outlet approved by the appropriate State agency. Industrial cooling water or unpolluted process waters may be discharged upon approval of the appropriate State agency, to a storm sewer or natural outlet.
(1977 Code Sec. 13.08)