(A)   No person shall discharge or caused 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.
Penalty, see § 51.999