No person shall cause to be discharged inflow, groundwater, uncontaminated cooling water, or uncontaminated process water to any public sanitary sewer.  Such water and other unpolluted water may be discharged to a sewer designated specifically as a storm sewer, or to a natural outlet, provided such discharge is approved by the local, state, or federal jurisdiction having authority.  (Ord., passed 7-28-83) Penalty, see § 50.999
   Discharge to natural outlet, see § 50.033