Baw Baw Shire uses a property risk rating and gives special attention to declared drinking-water catchments when assessing onsite wastewater proposals. This guide explains how those checks can affect the need for an LCA and the information required for a quotation.
View our Land Capability Assessment serviceAsk council for the property risk rating
Baw Baw’s Onsite Wastewater Management Plan assigns broad risk ratings to unsewered properties. Council states that properties rated Medium or higher may require an LCA and can advise the recorded rating and the documents required for an application.
The rating is a screening tool. It does not establish whether a particular treatment or effluent dispersal system (EDS) is feasible and does not replace the site and soil investigation.
Check declared drinking water catchment status
Council’s current guidance states that an LCA is required for applications within a declared water supply catchment. Gippsland Water provides an address-search map for the catchments it manages.
Use the map as a preliminary check and confirm the result with council and the relevant water corporation. The map does not show Baw Baw’s property wastewater-risk rating and does not cover catchments managed by another water corporation.
Account for seasonal rainfall
Baw Baw council identifies the West Gippsland climate as a material constraint because rainfall can exceed evaporation during parts of the year. A water balance may therefore be needed to test whether a proposed land application area can manage the design wastewater load.
The need for monthly or more detailed modelling depends on the site, risk, proposed development and receiving environment. It should not be assumed as a fixed scope until the project information and council requirements have been reviewed.
Subdivisions, dwellings and alterations follow different pathways
A subdivision needs to demonstrate that wastewater can be treated and retained within each proposed lot. A new dwelling needs an onsite wastewater permit before installation. An extension or change to a building may require review of the existing system if it increases the wastewater load, and physical system alterations require council approval.
For non-residential proposals, wastewater volume and composition may require expanded investigation, modelling and design. Systems exceeding 5,000 litres per day fall within the Environment Protection Authority (EPA) permission pathway rather than the council A20 pathway.
How the local requirements shape the assessment
The LCA should test the proposal against the property’s site and soil conditions, available land, nearby waterways and catchment context. It may need to consider water balance, nutrient risks, treatment level, feasible EDS options, setbacks and controls.
Yarra Geotechnics keeps council’s property wastewater-risk assessment separate from both the Gippsland Water catchment check and the project-specific level-of-constraint assessment. The quotation sets out the proposed scope, fee and deliverables after the council rating, catchment context and project documents are reviewed.
What to send for a quotation
- Property address and council risk rating, if already obtained
- Latest site plan and floor plans
- Proposed bedrooms, occupancy or non-residential wastewater information
- Council or water-corporation correspondence
- Existing-system information for alterations or replacement work
- Previous reports and planning information
Send the information you have. We can identify any additional information needed to prepare your quotation.
Frequently asked questions
How do I find the Baw Baw wastewater risk rating for my property?
Request the recorded wastewater-risk assessment directly from Baw Baw Shire’s Public Health team. Supply the property address and ask which supporting documents council expects; the Gippsland Water catchment search does not provide this council rating.
Does a Medium risk rating automatically mean a particular wastewater system?
No. Council says Medium and higher risk properties may require an LCA. The LCA then assesses the site and soil constraints and feasible treatment and EDS options.
Is the Gippsland Water map the same as Council’s wastewater risk map?
No. The Gippsland Water map indicates declared drinking-water catchment status within its area. Council’s wastewater risk rating is a separate screening result.
Why might a water balance be required in Baw Baw?
Council identifies seasonal excess rainfall as an important local constraint. A water balance can test how the wastewater load, rainfall, evapotranspiration and soil acceptance interact for the proposed EDS.
What about a subdivision?
The planning application must demonstrate that wastewater can be treated and retained within each proposed lot. Wastewater planning should occur before lot boundaries and building envelopes are finalised.
Official resources
Baw Baw Wastewater Information
Directs owners to Council-held wastewater risk information and keeps that process separate from declared-catchment enquiries.
View Baw Baw Wastewater InformationBaw Baw Getting a System
Outlines the permit pathway for dwellings, subdivisions and alterations.
View Baw Baw Getting a SystemBaw Baw Onsite Wastewater Management Plan Technical Document
Current risk framework and constraint mapping methodology.
View Baw Baw Onsite Wastewater Management Plan Technical Document (PDF)Gippsland Water drinking-water catchment map
Preliminary address check for Gippsland Water declared catchments.
View Gippsland Water drinking-water catchment mapEPA onsite wastewater guidance
Statewide A20 guidance used with Baw Baw’s Council risk assessment and separate catchment checks.
View EPA onsite wastewater guidanceBoundary: © State of Victoria (Department of Transport and Planning), Vicmap Admin. CC BY 4.0. Simplified for display. Catalogue updated 5 September 2026; retrieved 12 September 2026.
Council requirements last reviewed: 6 September 2026
Yarra Geotechnics is an independent consultancy and is not affiliated with or endorsed by Baw Baw Shire Council. Council determines the final application and permit requirements.
Need a Land Capability Assessment for a Baw Baw application?
Send the property address, current plans and any council correspondence. Yarra Geotechnics will review the project information and provide a quotation setting out the proposed scope, fee and deliverables.