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Skip Navigation LinksDNREC : Division of Water : Information : Surface Water Discharges Information : SWDS-Aquatic-Pesticides

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Aquatic Pesticides

Pesticide application in DelawareIn 2009, the U.S. Sixth Circuit Court determined that the application of biological pesticides and chemical pesticides with residuals to waters regulated under the provisions of the federal Clean Water Act (CWA) must be regulated by a National Pollutant Discharge Elimination Program (NPDES) permit.  On September 11, 2012, DNREC adopted the Regulations Governing the Discharges from the Application of Pesticides to Waters of the State.

The regulations cover discharges of biological pesticides and chemical pesticides that leave a residue, from the following pesticide use patterns: 

  • Mosquito and other flying insect pest control
  • Weed and algae control
  • Animal pest control, and
  • Forest canopy pest control

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Contact Us

For more information please email Jennifer Roushey.

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