The purpose of this chapter is to comply with the requirements of the U.S. EPA’s National Pollutant Discharge Elimination System (“NPDES”) permit program (the “Program”) administered by the Iowa Department of Natural Resources (IDNR) by adopting and enforcing regulations regarding illicit discharge to the City’s storm sewer system. The City shall fund operations under this chapter entirely by charges imposed on the owners of properties which are made subject to the Program by virtue of State and Federal law, and/or other sources of funding established by separate ordinance.