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National Pollutant Discharge Elimination System (NPDES)

  • About NPDES
    • Permit Basics
    • State Program Information
    • Permit Limits
    • Program Management and Oversight
    • NPDES Regulations
    • Other Federal Laws that Apply to the NPDES Permit Program
  • All NPDES Program Areas
    • Animal Feeding Operations
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    • Industrial Wastewater
    • Municipal Wastewater
      • Combined Sewer Overflows (CSOs)
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  • NPDES Technical Resources
    • Resources for Permit Writers
    • NPDES Permit Writers' Manual
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Contact Us About NPDES
Contact Us to ask a question, provide feedback, or report a problem.
Last updated on March 19, 2025
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