West Soil & Water conducts comprehensive soil testing in rural WA to prevent septic system failure and environmental contamination.


+ Tailored Compliance Management : We design our soil testing programs to align with the state and local government requirements relevant to your property, including the Government Sewerage Policy. This helps you avoid system failures, costly redesigns and regulatory delays.
+ Available Across Perth & WA : Site evaluations are essential on properties where reticulated sewage is unavailable. WSW is one of the few environmental consultants that can complete septic tank soil testing in regional Perth and rural WA.
+ Analysis in NATA Accredited Labs : Reliable soil testing needs accurate laboratory analysis. That’s why WSW works with NATA accredited facilities to ensure all results meet Australian standards.
A Site and Soil Evaluation (SSE) determines whether a property can safely manage water with an onsite sewage system or septic tank. It considers conditions like soil type, groundwater composition and nearby water to ensure installation and disposal practices will not harm public health or the environment.
At WSW, our consultants conduct SSEs like this:
+ Review property information and local government data
+ Conduct an onsite inspection and send samples for laboratory testing
+ Assess drainage conditions
+ Provide a report detailing the suitability of your preferred system and recommendations for treatment and disposal practices
If you are removing a septic system, our investigations will identify any contamination caused by the old system and recommend an appropriate remediation plan.


We’re an independent consultancy with over a decade of experience in contamination investigations. Operating solely in WA, WSW has an unparalleled knowledge of our states regulatory and environmental landscapes.
If conducted after a septic tank is removed, your investigation may reveal contamination challenges in soil or groundwater. WSW can address those issues with a remediation plan to reduce environmental and human risk and maintain compliance.
Septic systems aren’t the only health and compliance risk on your property. WSW can incorporate your SSE into a wider Preliminary or Detailed Site Investigation, looking into asbestos, acid sulfate soils and other parameters.


If you are planning to install or replace a septic tank in rural WA, a comprehensive Site and Soil Evaluation is the first step in a safe, compliant and contamination free process.
West Soil & Water use our 13 years of experience to create clear, regulatory aligned reports that allow you to move forward with confidence.
Contact our team today to arrange your Site and Soil Evaluation for septic installation.


WSW consultants usually complete an SSE in a single visit. Samples will be sent to a NATA accredited laboratory for analysis and our team will review the results. We will then send you a report detailing soil conditions and our recommendations.
Most evaluations are finalised within a few weeks.
If you are considering installing a septic system, you must account for:
+ Soil permeability
+ Groundwater depth
+ Site slope
+ Available land area
+ Proximity to waterways
An SSE will assess these conditions and determine whether your chosen system can safely operate on your property.