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  1. Home
  2. National Pollutant Discharge Elimination System (NPDES)

Combined Sewer Overflow Technical Assistance

CSO Topics
  • CSO Homepage
  • Basics
  • Location of CSO Outfalls
  • Solutions
  • Training
  • Technical Assistance
  • Policy
  • Great Lakes Basin
  • Program Progress
  • Additional Resources

EPA offers support to combined sewer overflow (CSO) permittees and state National Pollutant Discharge Elimination System (NPDES) permitting authorities that may lack the necessary resources or have questions on complying with the CSO Control Policy and Clean Water Act.

EPA can provide a range of assistance including the following:

  • Using EPA’s CSO community spreadsheet-based tools
    • CSO Model
    • Long-Term Control Plan Review (LTCP) Checklist
    • Post-Construction Compliance Monitoring (PCCM) Checklist
  • Regulatory/compliance questions
  • Troubleshooting operation and maintenance problems
  • Asset management training
  • Smart sewer and smart data infrastructure training
  • Monitoring and modeling training

Please submit any questions or feedback through the comment form. If you are interested in providing feedback on more than one tool, please fill out separate forms for each tool. If you have trouble submitting this form or would like more information about CSO technical assistance opportunities offered by EPA, contact the NPDES program (NPDES@epa.gov).

National Pollutant Discharge Elimination System (NPDES)

  • About NPDES
    • Permit Basics
    • State Program Information
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    • Program Management and Oversight
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    • Other Federal Laws that Apply to the NPDES Permit Program
  • All NPDES Program Areas
    • Animal Feeding Operations
    • Aquaculture
    • Forest Roads
    • Industrial Wastewater
    • Municipal Wastewater
      • Combined Sewer Overflows (CSOs)
      • Sanitary Sewer Overflows (SSOs)
      • Peak Flows
      • Integrated Planning
    • National Pretreatment Program
      • Standards and Requirements
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      • Municipal Sources
      • Transportation Sources
      • Oil and Gas Permitting
      • Stormwater Planning
      • EPA's Residual Designation Authority
      • Rules and Notices
    • Water Quality Trading
  • NPDES Technical Resources
    • Resources for Permit Writers
    • NPDES Permit Writers' Manual
    • NPDES Training
    • Tools
    • Electronic Notice of Intent (eNOI)
    • NPDES Applications and Forms
Contact Us About NPDES
Contact Us to ask a question, provide feedback, or report a problem.
Last updated on September 16, 2024
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