1. Any connection that could allow conveyance of any solid, liquid or gas material not composed entirely of surface and stormwater directly to water resources is considered an illicit connection and is prohibited, except:

2. Floor drains shall not be installed inside an operation which stores or uses hazardous materials unless approved by the city for connection to sanitary sewer. Existing floor drains connected to storm drains or to surface water drains located in or near indoor hazardous material storage or use areas are considered unauthorized connections and shall be sealed or removed to prevent liquid entry, piped to the sanitary sewer (with approval and appropriate shut-off valves), be routed to blind sumps or be directed to additional containment or treatment systems meeting the standards of this chapter.

1. Uncontaminated water from crawl space pumps or footing drains;

2. Materials placed as part of an approved habitat restoration or bank stabilization project;

3. Natural uncontaminated surface water or ground water;

4. Flows from riparian habitats and wetlands;

5. City-approved dye testing following verbal notification to the city at least one day prior to the date of test. The city and the Clark County public works department are exempt from this requirement;

6. Any discharge allowed by an operation’s National Pollutant Discharge Elimination System (NPDES) permit or other authorized discharge permit;

7. Any discharge specifically allowed in writing by a local, state or federal agency for remedial action in an agreed order, a consent decree or in a voluntary cleanup effort.

1. All allowable discharges specified in subsection C of this section;

2. Potable water;

3. Potable water line flushing;

4. Landscape watering;

5. Residential car and boat washing;

6. Residential swimming pool and spa water;

7. Common discharge practices from water well disinfection.

1. Discharges from potable water sources, including water line flushing, hyperchlorinated water line flushing, fire hydrant system flushing, and pipeline hydrostatic test water. Planned discharges shall be dechlorinated to a concentration of one-tenth part per million or less, pH-adjusted, if necessary, and volumetrically and velocity controlled to prevent resuspension of sediments in the stormwater drainage system.

2. Discharges from landscape watering and other irrigation runoff. These shall be minimized through, at a minimum, public education activities and water conservation efforts.

3. Dechlorinated swimming pool discharges. The discharges shall be dechlorinated to a concentration of one-tenth part per million or less, pH-adjusted and reoxygenized if necessary, volumetrically and velocity controlled to prevent resuspension of sediments in the stormwater drainage system. Swimming pool cleaning wastewater and filter backwash shall not be discharged to the stormwater drainage system.

4. Street and sidewalk wash water, water used to control dust, and routine external building wash down that does not use detergents. The city shall reduce these discharges through, at a minimum, public education activities and/or water conservation efforts. To avoid washing pollutants into the stormwater drainage system, the city must minimize the amount of street wash and dust control water used.

5. Other nonstormwater discharges. The discharges shall be in compliance with the requirements of the stormwater pollution prevention plan received by the city, which addresses control of construction site dewatering discharges.