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On-site sewage management risk ratings

Council has adopted a risk rating structure for on-site sewage management systems based on the Environment & Health Protection Guidelines published by the NSW Office of Local Government.   

On-site sewage management systems are allocated a risk rating based on what would happen if they were to fail and these risks are described below. 

Definition of High risk

High risk systems will be inspected every 1-2 years. These systems are high risk if: 

  • they are located within 150m of a waterway (or drainage gully) that is within 15km of an oyster lease or town drinking water draw point, or
  • they are located within 250m of a bore. 

Definition of Medium risk

Medium risk systems will be inspected every 3-5 years. If your system is not classified as High Risk but is still:

  • within 40m of a dam or drainage gully, or
  • within 100m of a river, or
  • on an allotment less than 6000m2, or
  • within a RU5 or R5 Zone. 

Definition of Low risk

The remaining systems that do not fit into the high or medium risk categories. Low risk systems will be inspected every 5-10 years.

What is my risk rating?

You can see your properties risk rating by using our online interactive map below. Instructions on how to use the map are provided in the app. If you have any difficulties viewing the map on this page please open the risk rating map in a new window.

Commercial systems

Commercial systems are separated into two types. These are:

  • commercial small, which produces less than 2000L of waste water per day; and
  • commercial large, which produces more than 2000L of waste water per day.

Commercial systems can be more complex with larger volumes of waste water, different waste types, multiple treatment stages, or even many separate systems working together. This means that the inspection of a commercial system can be more involved and take longer than a normal domestic inspection.

The commercial systems will still be inspected every 1 - 3 years depending on where they are located.

This page was last updated on: 03 October 2018