Stormwater Program

Stormwater Runoff

Stormwater runoff is produced when precipitation events flows over land or other impenetrable surfaces and does not permeate into the ground. As the runoff flows over the land or impenetrable surfaces (paved streets, parking lots, and building rooftops), it accumulates debris, chemicals, sediment or other pollutants that could adversely affect water quality if the runoff is expelled untreated. The primary method to control storm water discharges is the use of best management practices (BMPs). In addition, most storm water discharges are considered point sources and require coverage under an National Pollutant Discharge Elimination System (NPDES) permit. 

 

Stormwater Program

The Environmental Services division administers programs to reduce the overall pollutants within the surface waters of Denison and to ensure compliance with the National Pollution Discharge Elimination System (NPDES) Storm Water Phase II rule. In Texas, the Texas Commission of Environmental Quality (TCEQ) administers the Texas Pollution Discharge Elimination System (TPDES). As a TPDES phase II City, Denison operates and maintains a ‘municipal separate storm sewer system’ or MS4 for residents and businesses within the City of Denison. 

Watershed Protection services include:

  • Detecting and eliminating illicit discharge
  • Construction stormwater inspections
  • Public education, outreach and involvement
  • Review of Stormwater Pollution Prevention Plans (SWPPPs) and erosion control plans
  • Ensuring regulatory compliance with TPDES
  • Environmentally Sensitive Area assessments
  • Coordination of volunteer citizen scientists
  • Municipal good housekeeping