921.12 CERTAIN WASTES PROHIBITED IN SEWERS.
   (a)    No person shall discharge or cause to be discharged into the sanitary sewers of the City any roof waters, surface or subsoil drainage and other clean waste waters.
   (b)    No person shall discharge sewage or cause sewage to be discharged into the storm sewers and drains of the City.
(1957 Code §16-3)