The following divisions include, but do not limit, the conditions which are deemed to be nuisances in the city:
   (A)   Offensive smells. Erecting, continuing or using any building or other place for the exercise of any trade, employment or manufacture, which, by occasioning noxious exhalations, unreasonably offensive smells or other annoyances, becomes injurious and dangerous to the health, comfort or property of individuals or the public;
   (B)   Filth or noisome substance. Causing or suffering any offal, filth or noisome substance to be collected or to remain in any place to the prejudice of others;
   (C)   Impeding passage of navigable river. Obstructing or impeding without legal authority the passage of any navigable river, harbor or collection of water;
   (D)   Water pollution. Corrupting or rendering unwholesome or impure the water of any river, stream or pond, or unlawfully diverting the same from its natural course or state, to the injury or prejudice of others;
   (E)   Blocking public and private ways. Obstructing or encumbering, by fences, buildings or otherwise, the public roads, private ways, streets, alleys, commons, landing places or burying grounds;
   (F)   Billboards. Billboards, signboards and advertising signs, whether erected and constructed on public or private property, which so obstruct and impair the view of any portion or part of a public street, avenue, highway, boulevard or alley or of a railroad or street railway track as to render dangerous the use thereof. See also § 71.009;
   (G)   Storing of flammable junk. Depositing or storing of flammable junk, such as old rags, rope, cordage, rubber, bones and paper, by dealers in those articles within the fire limits of the city, unless in a building of fireproof construction. See also Chapter 95;
   (H)   Air pollution. Emission of dense smoke, noxious fumes or fly ash;
   (I)   Weeds, brush. Dense growth of all weeds, vines, brush or other vegetation in the city so as to constitute a health, safety or fire hazard;
   (J)   Dutch elm disease. Trees infected with Dutch elm disease;
   (K)   Airport air space. Any object or structure hereafter erected within 1,000 feet of the limits of any municipal or regularly established airport or landing place, which may endanger or obstruct aerial navigation including take-off and landing, unless the object or structure constitutes a proper use or enjoyment of the land on which the same is located;
   (L)   Houses of ill fame. Houses of ill fame, kept for the purpose of prostitution and lewdness; gambling houses; places resorted to by persons participating in criminal gang activity prohibited by Iowa Code Chapter 723A or places resorted to by persons using controlled substances, as defined in Iowa Code § 124.101, in violation of law, or houses where drunkenness, quarreling, fighting or breaches of the peace are carried on or permitted to the disturbance of others;
   (M)   Unsafe signs. Any sign or sign structure which is structurally unsafe, constitutes a hazard to safety or health by reason of its location, inadequate maintenance or dilapidation, is not kept in good repair or is capable of causing electric shocks to persons likely to come in contact with it;
   (N)   Obstructing signs. Any sign or sign structure which obstructs free ingress or egress to or from public streets;
   (O)   Obscene signs. Signs containing statements, words or pictures of an obscene, indecent or immoral character, such as will offend public morals and decency; and
   (P)   Construction debris. Dirt, debris or other sedimentation resultant from grading, construction, demolition or repair activities which is deposited or allowed to be deposited:
      (1)   On to public rights-of-way in amounts which could cause a danger to public health, safety or welfare;
      (2)   Into public storm sewers or drainage ways in amounts which could cause an obstruction to the flow of the same; or
      (3)   Into public streams, rivers or lakes in amounts which could cause pollution of the same.
(Iowa Code § 657.2) (1999 Code, § 50.02)