Final National Pollutant Discharge Elimination System (NPDES) Electronic Reporting Rule

Dear NetDMR User,
We are improving NetDMR to make it more accessible, secure and efficient! We apologize for any inconvenience, but we need your help to complete the upgrade. In order to finalize your account set-up in the new system and maintain access to NetDMR, please click on the hyperlink below and follow the steps to update your account:
If you did not get the Customer Recovery Key (CDK) email from CDX or are having issues logging into CDX, please call the CDX Help Desk at 888-890-1995
If you are a Signatory, you will go through extra steps to establish your electronic signature in CDX. These steps include providing 5 Security Questions and Answers and signing the CDX Electronic Signature Agreement (ESA).
We greatly appreciate your support during this upgrade.
CDX Help Desk
888-890-1995 | (970) 494-5500 for International callers



NetDMR is a national tool that allows facilities permitted under the National Pollution Discharge Elimination System (NPDES) program to electronically submit discharge monitoring reports (DMRs) via the Internet. Submissions are sent to the U.S. EPA through the Environmental Information Exchange Network. It allows participants to discontinue mailing in hard copy forms under 40 CFR 122.41 and 403.12. 

For assistance with using NetDMR, you may contact the Maryland Department of the Environment by:

Email to

Telephone: 410-537-3520

For more information about NetDMR please click here.​