Large parts of the Wingecarribee Shire sit within the Sydney drinking water catchment, the area whose runoff eventually feeds the dams and storages that supply Sydney’s drinking water. If your Southern Highlands property falls inside this catchment, pool removal isn’t approached differently in terms of the physical demolition itself, but a handful of extra considerations, mostly around water discharge, erosion and sediment, sit alongside the standard planning framework. This guide explains what the catchment designation actually means for a pool removal job, and where it genuinely affects your project.
What the Sydney Drinking Water Catchment Actually Covers
The Sydney drinking water catchment is the land area that drains into the storages supplying Sydney’s water. It’s a large area extending well beyond metropolitan Sydney, taking in most of the Wingecarribee Shire along with parts of Wollondilly, Wollongong and several other local government areas to the south and west of Sydney. The catchment is regulated principally through the State Environmental Planning Policy (Sydney Drinking Water Catchment) 2011 (commonly the “Catchment SEPP”), administered alongside advice from WaterNSW, the authority responsible for catchment health and water quality across the supply system.
Because so much of the Wingecarribee Shire sits within this catchment, most Southern Highlands properties, including the great majority of those covered in Bowral, Mittagong, Moss Vale, Berrima and surrounds, are technically within its boundary. This is the norm for this region rather than the exception, and it doesn’t automatically mean your pool removal will be more complicated.
What the Catchment SEPP Actually Regulates
The Catchment SEPP’s central mechanism is the “neutral or beneficial effect” (NorBE) test. Where a development application is lodged for land in the catchment, the consent authority (usually the local council) must be satisfied that the proposal will have a neutral or beneficial effect on water quality, in practical terms, that it won’t increase nutrient loads, sediment or pollutant discharge into the catchment compared with the existing situation.
The important distinction for pool removal: the NorBE test is a consideration that attaches to development applications, not to exempt development. Most residential pool removals in the Southern Highlands, as explained in our Wingecarribee Council pool removal guide, qualify as exempt development under the separate State Environmental Planning Policy (Exempt and Complying Development Codes) 2008, meaning they don’t require a DA and generally don’t trigger a formal NorBE assessment in the first place.
Where the NorBE test can become relevant is if your pool removal is bundled into a broader development application for other reasons, for example, if your property is heritage-listed and a DA is required on that basis (see our Section 68 approval guide for how these different approval layers can interact), or if significant associated earthworks push the job outside the standard exempt pathway. Our exempt development guide covers what specifically pushes a job from exempt development into a CDC or DA in more detail. In those cases, the certifier or council assessing the DA will weigh catchment water quality alongside the other planning matters.
Where Catchment Sensitivity Actually Shows Up on a Pool Removal Job
In practice, for the great majority of jobs, the catchment designation doesn’t change the approval pathway at all. Where it does show up is in the standard of care expected during the physical work itself, considerations that are good practice on any job, catchment or not, but that carry more weight, and more scrutiny, on catchment land.
Pool water discharge. A full or partially full pool typically holds several tens of thousands of litres of chlorinated water that has to go somewhere before demolition can start. On catchment land, discharging this water directly into a stormwater drain, natural watercourse or dam without treatment isn’t appropriate. Standard practice is to let residual chlorine dissipate, or treat the water to neutralise it, before a slow, controlled release to a vegetated area that can absorb it, or in some cases to arrange for the water to be pumped out and removed off-site entirely. Your contractor assesses the volume and condition of your pool water at the site inspection and plans the discharge method accordingly.
Sediment and erosion control. Excavation, especially on sloped Highlands properties, has the potential to generate sediment-laden runoff. Standard sediment control measures, silt fencing, diverting clean water away from the disturbed area, and stabilising exposed soil promptly, are used as a matter of course on these jobs, and they take on added importance on catchment land, where any sediment escaping the site has a longer chain of consequence than it would elsewhere.
Fuel, oil and equipment management. Excavators and other machinery on site carry fuel and hydraulic fluid. Standard practice, refuelling well away from drainage lines and having spill containment on hand, is a routine part of how any responsible contractor runs a site, and is worth being especially deliberate about on catchment land.
Proximity to watercourses. If your property has a dam, creek or other watercourse near the pool or the access route to it, additional buffer distances and care may apply. This is assessed at the site inspection alongside the standard tree protection and access assessment.
Do You Need to Do Anything Extra Because You’re in the Catchment?
For a standard residential pool removal proceeding as exempt development, the honest answer is: not usually, beyond the water discharge, sediment control and equipment management practices described above, which should be standard good practice on any Southern Highlands job regardless of catchment status. You generally don’t need a separate approval from WaterNSW to demolish a residential pool. Where your project involves other elements, significant earthworks, a new septic or on-site wastewater system near the pool area, or works close to a mapped watercourse, those elements may need separate assessment, and your contractor flags this at the site inspection rather than assuming it away.
How to Check Your Property’s Catchment Status
Most Wingecarribee properties sit within the mapped catchment, but you can confirm your specific property’s status, and see the relevant catchment and watercourse mapping, via the NSW Planning Portal’s spatial viewer or Wingecarribee Shire Council’s own mapping tools. If you’re unsure, we can help identify the relevant maps as part of a quote enquiry.
Frequently Asked Questions
Does living in the Sydney drinking water catchment mean I need extra council approval to remove my pool? Not usually. Most residential pool removals proceed as exempt development regardless of catchment status. The catchment designation mainly affects the standard of care expected during discharge of pool water and management of sediment on site, not the approval pathway itself.
Can I just drain my pool water onto the lawn or into the stormwater drain? Chlorinated pool water shouldn’t be discharged directly into stormwater drains or natural watercourses, on catchment land or otherwise. Letting chlorine dissipate before a slow, controlled release to a vegetated area, or arranging off-site removal of the water, is the appropriate approach, and your contractor plans this as part of every job.
Does the Catchment SEPP apply to every property in Wingecarribee Shire? Much of the shire sits within the mapped Sydney drinking water catchment, but not every property is affected in the same way, and some parts of the shire fall outside the boundary entirely. We can help you confirm your specific property’s status.
Will being in the catchment make my pool removal more expensive? Generally no. The good-practice measures around water discharge, sediment control and site management are part of how these Southern Highlands jobs are run, catchment or not, so there’s typically no separate cost line for “catchment compliance” on a standard residential pool removal.
Not sure whether your property sits in a sensitive part of the catchment, or whether other planning factors apply to your pool removal? Request a free quote; if your enquiry is referred, the contractor’s site inspection confirms what’s relevant to your specific address.