Connecticut Department of Energy & Environmental Protection

Central Data Exchange Network & Electronic Reporting Through NetDMR in Connecticut

EPAs 2015 NPDES Electronic Reporting Rule (eRule) required permittees with water discharge permits to submit Discharge Monitoring Reports electronically. Connecticut utilizes EPA’s Central Data Exchange (CDX) Network to access the Web-based NetDMR application. The CDX registration website supports the requirements and procedures set forth under the EPA's proposed Cross-Media Electronic Reporting Regulation.

What is NetDMR?

NetDMR is a web-based application that allows water dischargers to submit DMRS electronically to Connecticut. NetDMR provides separate customizable program services unique to each permittee.

Before getting started, DEEP recommends visiting the EPA Support Portal and New User webpage.

  NetDMR Support Portal

  New Users- Start Here

  EPA NetDMR Training Schedule

 

Register for a CDX/NetDMR Account in 3 Easy Steps:

Step 1: Review and complete the CT DEEP NetDMR Subscriber Agreement

The NetDMR Subscriber Agreement should be reviewed and signed by the Signatory Authority, and any delegated users that will submit DMR data on behalf of a site. 

  • Water Permitting & Enforcement Division (WPED):
    • If you are submitting a water discharge application or already have a water discharge permit from the Water Permitting & Enforcement Division, please complete this Agreement and submit it to the Division.
  • Submittal of the WPED Agreement:
    • For Stormwater Program applications & permits submit the signed Agreements to DEEP.Stormwaterstaff@ct.gov
    • For all other applications & permits submit the signed Agreements to  DEEP.NetDMR@ct.gov

Step 2:  Create a CDX/NetDMR Account

Visit the CDX website at https://cdx.epa.gov/ to create your user account.

 

EPA provides tutorials here: How to create a new NetDMR account

Step 3: Request Signatory Roles in CDX/NetDMR

The CDX/NetDMR account can be created online at anytime, however, you will not be able to request user roles until you have submitted the signed NetDMR Subscriber Agreement to CT DEEP & it has been approved.

Please follow these instructions, NetDMR's Instructions to learn how to assign user roles in NetDMR.

 

Additional Assistance:

If you need assistance creating an account in CDX or need a password reset, please contact the EPA NPDES eReporting Helpdesk. 

For Stormwater Program questions contact  DEEP.Stormwaterstaff@ct.gov

For Industrial Wastewater Program questions contact  DEEP.NetDMR@ct.gov

 

Additional Resources:

NetDMR Support Portal  - EPA has guidance documents, tutorials, and FAQ documents

FAQs: Specific to Reporting in CT (provided by DEEP)

System Information | Central Data Exchange | US EPA

EPA Region 1 Quick Reference Guide for Electronic Submission of NPDES Program Specific Reports through NetDMR (Permittees & Internal Users)

EPA CDX Online Registration User Guide

Content Last Updated December 1, 2025