Onsite Wastewater Management Systems Program


Welcome to the Onsite Wastewater Management Systems Program

The purpose of the program is to administer the Onsite Wastewater Management Systems Regulation pursuant to The Environment Act. A team comprised of Environment Officers and a Wastewater Management Specialist has been established for this purpose. Team members are regionally based to provide local coverage, and centrally coordinated to ensure consistent delivery of the program.

Program responsibilities include:

  • Investigations of complaints
  • Registration of Onsite Wastewater Management Systems (OWMS)
  • Certification of OWMS Installers
  • Registration of Sewage Haulers
  • Inspection of new OWMS
  • Monitoring of OWMS
  • Enforcement of the Onsite Wastewater Management Systems Regulation

Several documents on this site are in PDF format.  They require Adobe Acrobat Reader 5 or higher.  Click here to download the free Acrobat Reader software.


Changes to Graded Stone Requirements for Prefabricated, Gravel-less Chambers

Effective July 18, 2018, the placement of graded stone beneath prefabricated, gravel-less chambers is no longer required or recommended for disposal field systems, including sand mounds and sand-lined trenches.  This change applies to chambers with an H-10 AASHTO load rating (16,000 lbs/axle).  Graded stone is still required beneath chambers having an H-20 AASHTO load rating (32,000 lbs/axle) to provide structural support. This change is based on manufacturer recommendations and is consistent with other jurisdictional requirements for chamber systems.

Note: AASHTO = American Association of State Highway Transportation Officials

New Registration Application Forms

New application forms have been developed for the registration of onsite wastewater management systems (OWMS).  There are now separate forms for the registration of Disposal Fields and Holding Tank & Septic Tank Replacements.  These are fill-able forms that can be downloaded and completed using Adobe Reader, with the exception of the Site Plans which require hand drawings.  The forms are available in Imperial and Metric units and in alternative formats upon request.

Effective August 14, 2017, applications to register an onsite wastewater management system are to be submitted using the new forms.

Application to Register a Disposal Field  OWMS

Application to Register a Holding Tank/Septic Tank Replacement

Installer Training Course for Onsite Wastewater Management Systems

The next Installer Training Course is scheduled for the week of September 24-28, 2018 at Red River College.  This course has a limit of 30 students and usually fills-up quickly so please register early.