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On-Site Sewage Management System

If you live in an area of the Coffs Harbour LGA not serviced by Council’s sewer system than more than likely you will need or are operating an existing on-site sewage management system. The following information has been provided detailing the regulatory requirements of operating an on-OSSM, the application process for installing or modifying an OSSM, and Council’s role in monitoring the ongoing performance of these systems.

What work is being done?​

Waste Water Report required?​

​New OSSM and new plumbing and drainage work


Amend existing house drainage (includes changes to existing septic tank and drainfield)



​Total or partial replacement of septic tank with aerated wastewater treatment system and / or new effluent drain field – includes inspection.(no house drainage works)



Total or partial replacement of septic tank only ​No

The Form

Carry Out Sanitary Plumbing and Drainage Works and/or OSSM Works

Does your planned work include sanitary plumbing and drainage? Check out the Plumbing and Drainage page to understand that process.

The process for this application

Before Work Starts

Complete this form and provide a Waste Water Report if required (see table below) – A Waste Water Report is created by a consultant of your choice. You must make sure that the report contains all required information. Use our   Checklist for Waste Water Report to make sure your report is complete.

After Approval to Install is Issued

  1. Council will send the approval to install to the applicant. This will include a Compliance Certificate – OSSM form which should be forwarded to your plumber of choice.
  2. Once you receive your approval you can begin work
  3. Book your inspection at the appropriate time
  4. Council will carry out an inspection

Before Approval to Operate is Issued

  1. You must submit your completed Compliance Certificate – OSSM form.

Learn more about on-site sewage management systems

About booking inspections

Inspection booking requests must be submitted to Council a minimum of 24 hours prior to the required inspection time. 

Inspections will generally be accepted as either an AM booking (10.30am to 12.30pm) or a PM booking (1.30PM to 3.30PM) with inspections undertaken Monday to Friday. Call 6648 4555 to make your booking. The phone is answered from 8am each morning but leave a message for the team at any time.