No person shall discharge or cause to be discharged any stormwater, groundwater, roof runoff, subsurface drainage, downspouts, yard drains, yard fountains and ponds, lawn sprays, water from swimming pools or unpolluted industrial water into any sanitary sewer in the system.
(1987 Code, ch. 10, sec. 3(A))
No person shall discharge or cause to be discharged into any public sewer any of the following described substances, materials, waters or wastes:
(1) 
Any liquid or vapor having a temperature greater than 122°F (50°C).
(2) 
Any toxic, corrosive, flammable or explosive liquid, solid or gas, such as gasoline, kerosene, phenols, benzene, naphtha, etc.
(3) 
Any water or wastes which contain wax, grease, oil, cleaning solvents, mineral oils or other substances which will solidify at temperatures between 32°F to 150°F.
(4) 
Any garbage that has not been properly shredded.
(5) 
Any solid or viscous substances, such as ashes, cinders, sand, mud, gravel, straw, tar, asphalt, ceramic wastes, shavings, sawdust, whole blood, paunch manure, hair and fleshings, entrails, lime slurry, lime residues, slops, chemical residues, paint residues and bulk solids.
(6) 
Any heavy metals, such as those listed below:
Antimony
Arsenic
Barium
Beryllium
Bismuth
Boron
Cadmium
Chromium (hexa)
Chromium (tri)
Cobalt
Copper
Iron
Lead
Manganese
Mercury
Molybdenum
Nickel
Rhenium
Selenium
Silver
Strontium
Tellurium
Tin
Uranyl ion
Zinc
(7) 
Any radioactive wastes or isotopes of such half-life or concentration that exceeds limits established by the U.S. Public Health Service for public drinking water standards.
(8) 
Any wastes or waters containing substances which are not amenable to treatment or reduction by the sewage treatment process employed, or are amenable to treatment only to such degree that the sewage treatment plant effluent cannot meet the requirements of other agencies having jurisdiction over discharge to the receiving waters.
(1987 Code, ch. 10, sec. 3(B))
Discharge into the city sewer system shall consist only of domestic sewage, properly shredded garbage, industrial wastes and other wastes which are free from the prohibited constituents listed above and limited to BOD, suspended solids, dissolved sulfides, and pH as follows:
(1) 
Biochemical oxygen demand (BOD) of such wastes delivered shall not exceed ppm [sic], as determined by Standard Methods.
(2) 
Suspended solids delivered shall not exceed 250 ppm, as determined by Standard Methods.
(3) 
Hydrogen ion concentration (pH) of the sewage delivered shall be no lower than 6.0 nor higher than 9.5 and any [no] acid wastes shall be discharged unless neutralized to a pH of 6.0 or more.
(4) 
Dissolved sulfides in the wastes delivered to the system shall not exceed 0.1 ppm.
(5) 
Alkalinity shall not exceed 400 ppm.
(1987 Code, ch. 10, sec. 3(C))
The volume and rate of flow of wastes to the sewer system shall not be in excess of the capacity of the facility provided, as determined and regulated by the city administrator.
(1987 Code, ch. 10, sec. 3(D))
The city administrator and other duly authorized employees of the city bearing proper credentials and identification shall be permitted to enter upon all properties for the purposes of inspection, observation, measurement, sampling and testing, in accordance with the provisions of this division.
(1987 Code, ch. 10, sec. 3(E))
Any person found to be violating any provision of this division shall be served by the city with written notice stating the nature of the violation and providing a reasonable time limit for the satisfactory correction thereof. The offender shall, within the period of time stated in such notice, permanently cease all violations. If the offender continues violation after the expiration of the time stated, the city council may prohibit the further use of the sewage system by the offender and may remove or close the offender’s sewage and water connections.
(1987 Code, ch. 10, sec. 3(F))
Any person violating any of the provisions of this division shall become liable to the city for any expense, loss or damage occasioned by the city by reason of such violation.
(1987 Code, ch. 10, sec. 3(G))