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Stormwater Management


​Stormwater Management Program


The City of Coppell's Stormwater Management Program is committed to educate the public, contractors and developers on the storm water system and regulations, while promoting environmental stewardship. As a vital element in the City of Coppell overall water resource management strategy, our mission is to efficiently implement a stormwater program that effectively addresses flood control and run-off quality issues while emphasizing the elimination of non-point pollution at the source.​

What Is Stormwater?

Stormwater discharges are generated by runoff from land and impervious areas during rainfall. Surfaces like driveways, sidewalks, and streets prevent stormwater from naturally soaking into the ground.​

Why Is Stormwater Quality Important?

Stormwater can carry litter, sand, bacteria, oil and other chemicals as it flows to our streams, rivers, ponds and wetlands. Runoff from paved surfaces may contribute large amounts of polluted storm water. Cleaning up stormwater not only benefits our neighborhoods and town, it also benefits the entire network of water bodies and land that make up our watershed.

What Agency Regulates Stormwater Quality?

In City of Coppell, stormwater quality is regulated at the federal level by the Environmental Protection Agency (EPA), the state level by the Texas Commission on Environmental Quality (TCEQ) and at the local level by the City of Coppell Environmental Health Division.

As authorized by the Clean Water Act, the National Pollutant Discharge Elimination System (NPDES) permit program controls water pollution by regulating point sources that discharge pollutants into waters of the United States. Point sources are discrete conveyances such as pipes or man-made ditches. Individual homes do not need an NPDES permit; however, some industrial, municipal, and other facilities must obtain permits if their discharges go directly to surface waters.

What Is The Texas Pollution Discharge Elimination System?

 In 1987, Congress amended the Clean Water Act to require a comprehensive nationwide program for addressing polluted storm water. The National Pollutant Discharge Elimination System (NPDES) is the resulting program. The state assumed the authority to administer the NPDES program in Texas and the Texas Pollution Discharge Elimination System (TPDES) is the resulting program.

What Does The TPDES Permit Require Of The City Of Coppell?

 The City of Coppell has to develop, implement, and enforce a Stormwater Management Program (SWMP). The goals of the Plan are to:

  • Reduce the discharge of pollutants to the maximum extent possible
  • Protect water quality
  • Satisfy the appropriate water quality requirements of the Clean Water Act
For more information, see the current storm water management plan​.

What Minimum Control Measures (MCM's) Will The City Of Coppell's Program Include?

Per the TCEQ, TPDES General Permit Number TXR040000, the Stormwater Management Plan (SWMP) must provide a listing and description of best management practices (BMP's) developed to prevent stormwater pollution to the maximum extent practicable. BMP's are required to be developed to satisfy five stormwater quality minimum control measures:​

  1. Public Education, Outreach and Involvement
  2. Illicit Discharge Detection and Elimination
  3. Construction Site Stormwater Runoff Control
  4. Post-Construction Stormwater Management in New Development and Redevelopment
  5. Pollution Prevention/Good Housekeeping for Municipal Operations
For more information, see the 2018 annual report​​​.

To Report Illegal Dumping​

Call (​972) 462-5150 or email.

Information and links:​

Regional Stormwater Management Program​

National Pollutant Discharge Elimination System (NPDES)​