The WYPDES Program requires that permit holders comply with all permit requirements including:

  • submitting DMRs on time
  • submitting DMRs even when there was no discharge
  • submitting complete and legible DMRs
  • notifying the Water Quality Division of permit violations such as: excursions, failing to collect the required samples, and any other permit violations.

Failure to comply with the permit requirements may result in an enforcement action.

Management Requirements of any WPDES Permit specifies the following (for a full list of requirements check your permit):

  1. Noncompliance Notification
  2. Duty to Comply
  3. Upset Conditions
  4. Power Failures
  5. Duty to Mitigate
  6. Facility Operations
  7. Adverse Impact
  8. DMR Due Dates
Due Dates
Monthly Submission45 days of the completed sampling monthMonthly DMRs are due on the 28th day of the month following the completed reporting period
Quarterly Submission1st Quarter DMRs are due on May 15th; 2nd Quarter DMRs are due on August 15th; 3rd Quarter DMRs are due on November 15th; 4th Quarter DMRs are due on February 15th1st Quarter DMRs are due on April 28th; 2nd Quarter DMRs are due on July 28th; 3rd Quarter DMRs are due on October 28th; 4th Quarter DMRs are due on January 28th
Semi-Annual Submission1st Semester DMRs are due on August 15th; 2nd Semester DMRs are due on February 15th1st Semester DMRs are due on July 28th; 2nd Semester DMRs are due on January 28th
Annual SubmissionAnnual DMRs are due on February 15thAnnual DMRs are due on January 28th

This spring, the Wyoming Department of Environmental Quality (DEQ), Water Quality Division will begin transitioning to NetDMR for electronic submission of WYPDES discharge monitoring reports (DMRs). NetDMR is a web-based tool provided by EPA that allows permittees to electronically sign and submit DMRs to meet permit requirements. 

Previously, the Water Quality Division has facilitated electronic DMR submission through its eDMR system. As a newer system, NetDMR will offer streamlined sign-up and reporting processes to simplify DMR submittals for permittees and enhance benefits that include, but are not limited to, improved data availability, improved communication through email notifications, and improved data quality assurance/quality control. This transition is part of the Water Quality Division’s ongoing efforts improve efficiency and public transparency through the use of digital processes. In addition, the transition is an important component of ensuring compliance with the National Pollutant Discharge Elimination Electronic Reporting Rule.

In April, WYPDES staff will start contacting select permittees to begin the transition. Note that permittees will be transitioned to NetDMR in phases, and most permittees will not be contacted until the summer or fall to begin the transition. The DEQ anticipates a complete transition by the end of 2021. Outreach and training on NetDMR will be provided.

On December 21, 2015, the U.S. Environmental Protection Agency (EPA) first enacted the NPDES Electronic Reporting Rule (E-Rule) to modernize Clean Water Act reporting. The rule pushed for municipalities, industries, and other facilities covered by the NPDES permitting program to switch over to electronic data reporting instead of submitting paper Discharge Monitoring Reports (DMR). The rule required that all NPDES permittees submit their DMRs through some electronic reporting system.

NetDMR is a web-based reporting system developed by the EPA and channeled through the Central Data Exchange (CDX) system. Reporting on NetDMR requires only a computer, an
Internet browser, and high-speed access to the Internet.

Electronic reporting through NetDMR has several benefits including but not limited to: saving time and resources for permittees while increasing data accuracy, reducing submission errors, and improving compliance. Electronic reporting in general can help facilities and the state
streamline data and provide better clarity and compliance transparency by providing a faster, more complete, more accurate, and nationally-consistent set of data.
EPA also provides direct assistance and several training materials and sessions on how to sign up and use NetDMR, which is discussed below.

As previously mentioned, NetDMR is facilitated through EPA’s CDX system, so in order to get started, a person must first create a CDX account. (Note: If you already have an existing CDX account, you may be able to skip this process). Once that has been approved, a person can register for a signatory or other reporting role for their permit through the NetDMR system.


The link for CDX Production is:

NetDMR Production can be accessed through the following link: NetDMR Production.

EPA has provided a NetDMR support page, which provides user guides, fact sheets, videos, and other training materials on how to sign up and use NetDMR. In addition, they provide quarterly webinar trainings to provide NetDMR users with basic understandings on how to access, navigate, and use the NetDMR tool for the purpose of electronically reporting DMR data. The support portal also provides direct support through the submission of a support request ticket or
by calling the contact line directly.

The NetDMR Support Portal and the materials and links to webinars, etc. can be found below:

The sign up process for CDX can be found at the following link: EPA CDX Online Registration User Guide. A Power Point presentation on how to create a CDX can also be downloaded below.

An EPA user guide on how to create a NetDMR account and how to use NetDMR can be found here and downloaded below (PDF).

The latest list of active and inactive No Discharge Indicator Codes (NODI Codes) can be found here (Last updated 12/1/2020): NODI Code List.

EPA NetDMR Training Website and Training Schedule.

More state provided trainings and training material will also be created as the Wyoming DEQ continues to move forward with this transition.

If you have any questions about the NetDMR system or the transition over to NetDMR please send an email to

For specific questions and/or additional help with CDX and/or NetDMR please contact EPA NetDMR and CDX Customer Support.