Stormwater Quality Management Committee
Clark County Regional Flood Control District
600 S. Grand Central Pkwy. Las Vegas, NV 89106

Illegal Discharges to the Stormwater System

"An illegal discharge is defined as any disposal into the storm drain system for which a person or business does not have a permit."

Federal and State laws currently prohibit the discharge of certain non-stormwaters to the storm drain system. The purpose of these regulations is to protect the quality of the nation's surface water resources by minimizing contamination associated with urban activities. Prohibited discharges include industrial process water, sanitary sewer flows, dumping of liquid waste, and other non-storm flows.

The following information is designed to assist you in recognizing potential illegal/illicit discharges into the storm drain system, and provide a method for reporting observations to the appropriate local authorities.

What Types of Discharges to the Storm Drain System are Prohibited:

Prohibited Discharges:

  • Industrial process water
  • Commercial car wash wastewater
  • Sanitary sewer flows
  • Wash-down of loading areas
  • Wastewater treatment plant effluent
  • Dumping of liquid waste
  • Chlorinated pool water
  • Water softener brine backwash

Permissible Discharges:

  • Water utility line flushing
  • Runoff from firefighting
  • Landscape irrigation
  • Ground water recharge
  • Discharges from potable water sources
  • Dechlorinated pool water
  • Street wash water from cleaning/maintenance
  • Residential and fund raising car washing
Indications of Illegal/Illicit Discharges to the Storm Drain System:

  • Unusual color or cloudiness
  • Strong pungent or musty odor
  • Floating debris
  • Surface scum or foam
  • Oil sheen
  • Algae
  • Dead vegetation or inhibited growth
  • Dead animals
  • Stains on channel bottom or sides
  • Pipe corrosion

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