Regulatory Background

On November 21, 2008, the City of Duncanville received authorization of its Texas Pollutant Discharge Elimination System General Permit from the Texas Commission on Environmental Quality (TCEQ). The general permit requires the City of Duncanville, a Phase II Small MS4 (municipal separate storm sewer system), to implement a Storm Water Management Plan (SWMP) within the 5-year general permit term. The City of Duncanville’s SWMP includes best management practices developed for each of the following six minimum control measures:

  1. Public education and outreach on stormwater impacts;
  2. Public involvement / participation;
  3. Illicit discharge detection and elimination;
  4. Construction site storm water runoff control;
  5. Post-construction storm water management in new development and redevelopment; and
  6. Pollution prevention / good housekeeping for municipal operations.

The best management practices set forth in the initial 5-year permit term were continued until TCEQ could develop new guidelines for implementation for Year 6 forward. The new guidelines have now been established and the city will adapt those policies into its next permit application.

What is stormwater?

Stormwater is a term used to describe water that originates during precipitation events.

Why is stormwater runoff a problem?

Stormwater flows over rooftops, streets, driveways, and yards and picks up pollutants along the way and deposits them into our storm drains. Contrary to what many people think, storm drains do not lead to wastewater treatment plants. That means that any pollutant in stormwater runoff gets carried directly into our creeks, rivers, and lakes without treatment. In addition to causing water pollution, pollutants in stormwater can clog culverts, which can lead to flooding.

Public Awareness & Safety – Videos

Freddy the Fish Teaches About Stormwater

Stormwater to Drinking Water

How to Spot and Report Stormwater Pollution

Household Pollution Reducing Items

You can help reduce Stormwater Pollution in your home by properly disposing of large quantities of cooking oil and grease and by keeping your sinks clean. Residents are encouraged to come by the Public Works Department in City Hall and pick up the following supplies for home use:


A Zip-It is made of plastic and is 20-inches long with 18-inches of barbed length. It is used to:

  • clear shallow sink clogs;
  • promote clean-sink etiquette; and
  • promote proper disposal of fats, oils and greases.

Fat Trappers

Fat Trappers are foil-lined bags intended for disposing of used cooking oils and greases. Each bag holds 32 ounces of liquid and can withstand liquid temperatures up to 150º F. They can:

  • prevent clogged plumbing;
  • prevent unwanted mess; and
  • help keep your community’s water clean.