Property owners across Wollondilly Shire often need a wastewater report when building or upgrading on land that isn’t connected to the sewer network. Southern Wastewater Consulting provides professional, council-ready assessments that clearly show how wastewater can be safely treated and managed on your site. Our reports support development applications for rural homes, secondary dwellings, commercial ventures and subdivisions throughout the region.

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Agility and specialisation sit at the core of our approach—supporting quick turnaround, strong quality, and cost-effective delivery.

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Much of Wollondilly is made up of large lots, village zones and rural communities where reliable on-site sewage systems are essential. We analyse your soil, slope and environmental constraints to determine the most appropriate system—ensuring it meets Wollondilly Shire Council’s On-Site Sewage Management (OSSM) requirements and operates effectively long-term.

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We prepare wastewater reports for:

• New dwellings, rural homes, studios and granny flats

• System replacements, relocations and upgrades

• Subdivision and boundary adjustment proposals

• Commercial and tourism developments such as cafés, wineries, wedding venues, farm stays, schools.

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Every assessment is written in plain English and structured for quick and easy Council review. Your report will contain:

• Detailed site and soil testing

• A wastewater system sized and designed specifically for your land

• A scaled site plan showing irrigation or disposal areas, buffers and setback distances

• Clear guidance on suitable system types, including septic systems, aerated wastewater treatment systems (AWTS), composting systems, greywater reuse, absorption and irrigation solutions

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Effluent testing and system performance checks

For existing systems, we offer wastewater and effluent testing across the Wollondilly region. Tests measure nitrogen, phosphorus, E. coli, BOD and other indicators to confirm whether a system is performing safely and in line with Council expectations. Results are explained in straightforward language so you know exactly what’s working—and what may need attention.

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Experienced, local and focused on compliance

With more than 15 years in wastewater design, soil science, geology and regulatory compliance, we understand exactly what Wollondilly Shire Council looks for in OSSM assessments. Our goal is to deliver documentation that is practical, technically sound and ready for submission without delays.

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Areas we service in the Wollondilly Shire

Picton, Tahmoor, Thirlmere, Buxton, Couridjah, Bargo, Yanderra, Wilton, Bingara Gorge, Menangle, Menangle Park, Douglas Park, Appin, Pheasants Nest, Cawdor, Razorback, Orangeville, Belimbla Park, Glenmore, Werombi, The Oaks, Oakdale, Mowbray Park, Lakesland, Mount Hunter, Mount Hercules, Mount Murray, Silverdale, Warragamba, Wallacia, Nattai, Yerranderie, Burragorang, Avon Dam region, Cataract, Nepean Gorge localities, Werombi Common, Stonequarry, Myrtle Creek, Picton Lakes developments, Bargo River localities, Maldon, Tahmoor West, Picton North. 

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Southern Wastewater Consulting makes the wastewater reporting process simple, fast and compliant—so your development can move ahead with confidence.

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Contact us at info@southernwastewater.com.au or 0435 575 403 to discuss your project in the Wollondilly Shire.