(A) No person shall discharge or cause to be discharged any water such as stormwater, ground water, roof runoff, surface drainage or non-contact cooling water to any sanitary sewer.
(B) Stormwater and all other unpolluted drainage shall be discharged to those sewers as are specifically designed as storm sewers or to a natural outlet approved by the City and other regulatory agencies. Industrial cooling water or unpolluted process waters may be discharged to a storm sewer or natural outlet on approval of the City and upon approval and the issuance of a discharge permit by the MPCA.