Western Sydney Aerotropolis Stormwater

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We are asking for feedback the draft Aerotropolis Integrated Stormwater Scheme Plans for Wianamatta Badgerys & Cosgroves. A third scheme for Duncans Mulgoa is still in development. The scheme plans show the proposed regional stormwater infrastructure required to service these areas.

The draft scheme plans and supporting materials are available on our website, and you can provide your feedback from now until Monday 5 May 2025. The feedback we receive on the draft Aerotropolis Precincts Integrated Stormwater Scheme Plans for Wianamatta Badgerys Creek and Cosgroves Creek will be used to inform our designs for the future stormwater system.

About our work on stormwater for the Aerotropolis

In March 2022, the NSW Government appointed Sydney Water as the Regional Stormwater Authority for the Western Sydney Aerotropolis, including the Mamre Road Precinct.

This means Sydney Water is responsible for delivering, managing, and maintaining the regional stormwater network, alongside drinking water, wastewater, and recycled water services.

Building stormwater infrastructure for the Aerotropolis will require significant investment over the decades to 2056. Infrastructure will be built in stages as different parts of the Aerotropolis are completed, helping to reduce and manage the impact of development as it happens.

If we don’t plan carefully, urban development will lead to pollution and degraded waterways. That’s why we’re taking a smarter approach, ensuring clean water, healthy ecosystems, and a greener, more resilient city.

To support the vision for a restored and protected Wianamatta South Creek catchment that nourishes a cool, green and liveable Western Parkland City, our stormwater approach for the Aerotropolis will be delivered using a new model called integrated water cycle management (IWCM).

IWCM is an alternative approach to traditional water servicing where stormwater flows into natural water channels and wetlands instead of relying on buried concrete pipes or drains. Stormwater is then collected in wetlands for harvesting, treatment and reuse as recycled water for irrigation of parks and flushing of toilets.

Other benefits include:

  • creating healthier, more sustainable waterways

  • fostering water resilience

  • providing more open green space

  • reducing urban heat

  • lowering air pollution

  • visual benefits by using a natural and non-intrusive designs.

IWCM will help to create an overall cooler and greener, Western Parkland City and healthier Wianamatta South Creek catchment.

Integration of Stormwater and Recycled Water

The Aerotropolis integrated water system will be the largest stormwater harvesting scheme in Australia and will be delivered gradually over the next 10-20 years in alignment with the predicted completion of the precincts. Planning for the initial precincts is currently underway, including the Mamre Rd Precinct.

We will update this page as planning progresses.

If you have any questions, please contact the Community Engagement Team via aerostormwater@sydneywater.com.au.

We are asking for feedback the draft Aerotropolis Integrated Stormwater Scheme Plans for Wianamatta Badgerys & Cosgroves. A third scheme for Duncans Mulgoa is still in development. The scheme plans show the proposed regional stormwater infrastructure required to service these areas.

The draft scheme plans and supporting materials are available on our website, and you can provide your feedback from now until Monday 5 May 2025. The feedback we receive on the draft Aerotropolis Precincts Integrated Stormwater Scheme Plans for Wianamatta Badgerys Creek and Cosgroves Creek will be used to inform our designs for the future stormwater system.

About our work on stormwater for the Aerotropolis

In March 2022, the NSW Government appointed Sydney Water as the Regional Stormwater Authority for the Western Sydney Aerotropolis, including the Mamre Road Precinct.

This means Sydney Water is responsible for delivering, managing, and maintaining the regional stormwater network, alongside drinking water, wastewater, and recycled water services.

Building stormwater infrastructure for the Aerotropolis will require significant investment over the decades to 2056. Infrastructure will be built in stages as different parts of the Aerotropolis are completed, helping to reduce and manage the impact of development as it happens.

If we don’t plan carefully, urban development will lead to pollution and degraded waterways. That’s why we’re taking a smarter approach, ensuring clean water, healthy ecosystems, and a greener, more resilient city.

To support the vision for a restored and protected Wianamatta South Creek catchment that nourishes a cool, green and liveable Western Parkland City, our stormwater approach for the Aerotropolis will be delivered using a new model called integrated water cycle management (IWCM).

IWCM is an alternative approach to traditional water servicing where stormwater flows into natural water channels and wetlands instead of relying on buried concrete pipes or drains. Stormwater is then collected in wetlands for harvesting, treatment and reuse as recycled water for irrigation of parks and flushing of toilets.

Other benefits include:

  • creating healthier, more sustainable waterways

  • fostering water resilience

  • providing more open green space

  • reducing urban heat

  • lowering air pollution

  • visual benefits by using a natural and non-intrusive designs.

IWCM will help to create an overall cooler and greener, Western Parkland City and healthier Wianamatta South Creek catchment.

Integration of Stormwater and Recycled Water

The Aerotropolis integrated water system will be the largest stormwater harvesting scheme in Australia and will be delivered gradually over the next 10-20 years in alignment with the predicted completion of the precincts. Planning for the initial precincts is currently underway, including the Mamre Rd Precinct.

We will update this page as planning progresses.

If you have any questions, please contact the Community Engagement Team via aerostormwater@sydneywater.com.au.

  • Mamre Road Stormwater Scheme Plan December 2023 and associated documents

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    Based on further technical refinement and planning, including liaison with key stakeholders, please find below the following updated documents:

    Updates of the Stormwater Scheme Infrastructure Technical Guidelines, standard drawings, and Mamre Road Precinct Stormwater Scheme Report will be updated/released early in 2024.


  • Extension of consultation period - Draft Stormwater Developer Works Policy

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    We are pleased to advise we have extended the consultation period for the Draft Stormwater Developer Works Policy to allow more time for your review during this busy time of year and provide ample opportunity for your feedback via the survey.

    The online feedback survey will now be open until 5pm Thursday 11 January 2024.

  • Draft Stormwater Developer Works Policy – Consultation is open

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    As Regional Stormwater Authority, we are committed to enabling the efficient delivery of stormwater infrastructure to service the Mamre Road and Aerotropolis and Initial Precincts.

    We understand that developers are often best placed to deliver stormwater infrastructure, in parallel to land development, on behalf of Sydney Water. To facilitate this, and to allow for a fair and equitable sharing of costs, Sydney Water has prepared the draft Stormwater Developer Works Policy (draft Policy).

    The draft Policy aims to:

    • establish a consistent and transparent process that meets Sydney Water’s regulatory standards

    • achieve cost effective and timely delivery of stormwater infrastructure

    • work collaboratively with developers to align development needs to stormwater management needs.

    Consultation period

    We are seeking feedback from the development industry and interested stakeholders to help refine the draft Policy.

    The draft Policy can be accessed here from Wednesday 15 November to Thursday 14 December 2023.

    You can provide your feedback via this online survey until 5pm Thursday 14 December 2023

    Developer Briefing Session

    Developers and interested stakeholders are invited to an information session to understand more about the draft Policy on Wednesday 29 November 2023.

    Event: details:

    Format: In person

    Date: Wednesday 29 November 2023

    Time: 10:15am registration for a 10:30am start. The briefing will conclude at 12:00pm

    Location: ParkRoyal Parramatta, 30 Phillip St, Parramatta

    Meeting room: Elizabeth Room


    To attend the session, please register via this online form: Attendee registration form

  • Updated Mamre Road Precinct stormwater scheme plan & associated documents

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    Thank you to the community members and stakeholders who provided feedback on our draft Mamre Road Scheme Plan and Aerotropolis Stormwater Management Framework. Based on the feedback we have received as well as further technical studies and planning we have now finalised the following documents:

    1. Mamre Road Stormwater Scheme Plan. If you would like to access GIS layers for the trunk stormwater infrastructure click here.
    2. Stormwater Management Framework for Aerotropolis and Mamre Road Precincts


    We have also prepared a preliminary draft of a Stormwater Scheme Infrastructure Design Guideline:


    Mamre Road Precinct Stormwater Scheme Plan

    The Stormwater Scheme Plan shows the regional stormwater infrastructure required to service the Mamre Road precinct and to be managed by Sydney Water. For further information, click here to see the frequently asked questions.


    Stormwater Management Framework for Aerotropolis and Mamre Road Precinct

    The Framework proposes guiding principles for Sydney Water, in partnership with local councils, Department of Planning and Environment, and developers to manage trunk stormwater infrastructure in the Aerotropolis and Mamre Road precincts. The Framework has three components:

    1. Principles to guide development decisions and stormwater planning
    2. Proposed governance for management and delivery of stormwater assets
    3. Stormwater planning approvals pathway


    Stormwater Scheme Infrastructure Design Guideline

    The Design Guideline outlines Sydney Water’s design requirements for key elements of the stormwater infrastructure. The Design Guideline is currently in a preliminary draft. Sydney Water are publishing it prior to it being complete to allow developers and stakeholders the earliest opportunity to incorporate elements of the guideline that have been developed, into their projects and planning.


  • What we heard: Your feedback on our Mamre Road Scheme Plan

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    Thank you to the community members and stakeholders who provided feedback on our draft Mamre Road Scheme Plan.

    Your insights will inform our updated scheme plan, which will be posted on Sydney Water Talk before the end of the 2022.

    Click here for a summary of the key elements of what we heard from you during our engagement process earlier this year.

    Kind regards,

    Aerotropolis Stormwater Project Team

  • Extension of Consultation Period

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    The consultation period for the Aerotropolis Stormwater Management Framework, and the Mamre Road Draft Scheme Plan has now been extended.

    The due date for submissions is now Sunday 31 July 2022.

    We welcome feedback via our online survey. This will help us track feedback consistently across our interested stakeholders and ensure we can analyse and consider this feedback effectively while finalising our plans.

    Additional content regarding stormwater in Aerotropolis and Mamre Road has also been made available online, including:

    • a recording of the developer briefing where the project team explain the thinking behind the development of the plans
    • the Mamre Road Flood, Riparian Corridor and Integrated Water Cycle Management Strategy, available on the DPE website.

  • Developer Briefing - recording

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    A recording of the developer briefing held on Friday 10 June is now available. The briefing explains how Sydney Water proposes to manage stormwater in the Aerotropolis and Mamre Road precincts. The video also outlines the planning work that is currently on consultation.

    View the recording here.

  • Consultation is open for the Draft Aerotropolis Stormwater Framework

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    supporting image

    Sydney Water has developed a draft Aerotropolis Stormwater Catchment Framework and a draft Scheme Plan for Mamre Road precinct.

    The Framework and Scheme Plan are both draft, and open to feedback from stakeholders, landowners and the development industry until Sunday 24 July 2022.

    The Framework proposes guiding principles for Sydney Water, in partnership with local councils, Department of Planning and Environment, and developers to manage trunk drainage in the Aerotropolis and Mamre Road precincts.

    The proposed Framework has three components:

    1. Draft principles to guide development decisions and stormwater planning
    2. Proposed governance for management and delivery of stormwater assets
    3. Draft stormwater planning approvals pathway

    Also available is the draft Stormwater Catchment Scheme Plan for the Mamre Road Precinct as an example of how the principles will be applied to a particular catchment.

    Your feedback

    To have your say, please complete this survey. The survey will be open until midnight Sunday 24 July 2022.

    If you have any questions, you can email aerostormwater@sydneywater.com.au or call 1800 645 466.

    Consultation period

    Feedback from the development industry and landowners will help us refine the approach to managing drainage in the Aerotropolis, as detailed in the Framework.

    The proposed Aerotropolis Stormwater Management Framework and draft Stormwater Catchment Scheme Plan for the Mamre Road Precinct will be on display on Sydney Water Talk until Sunday 24 July 2022. We welcome your feedback during this time.

    Information sessions

    Developers were invited to a briefing to understand more about the proposed Framework and draft Scheme Plan for Mamre Road. The briefing was held online on Friday 10 June 2022, from 10am to 11.30am. A recording of the briefing session is available here.

    Landowners were invited to an in-person community information session that was held at Bringelly Community Centre 5 Greendale Road, Bringelly on Saturday 25 June from 10am to 11.30am.

    While we are still in the early stages, we are making progress towards providing more clarity for landowners. Information around land acquisition, however, will not be available until early 2024.

  • Upcoming engagement for Aerotropolis Stormwater

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    Sydney Water will soon be exhibiting the Aerotropolis Stormwater Catchment Framework and a draft Scheme Plan for Mamre Road precinct. The Framework proposes guiding principles for Sydney Water, in partnership with local councils, Department of Planning and Environment, and developers to manage trunk drainage in the Aerotropolis and Mamre Road precincts.

    Developer and landowner information sessions

    Developers are invited to a briefing to understand more about the proposed Framework and draft Scheme did the briefing here.

    Landowners are invited to an in-person community information session to be held at Bringelly Community Centre on Saturday 25 June from 10am to 11.30am. Registration is not required. Come along to hear from the project team about the progress they have made as trunk drainage authority and provide your feedback. While we are still in the early stages, we are making progress towards providing more clarity for landowners. Information around land acquisition, however, will not be available until later in 2023.

    Consultation period

    Feedback from the development industry and landowners will help us refine the approach to managing drainage in the Aerotropolis, as detailed in the Framework.

    During the exhibition period, we want to hear your feedback on the proposed Framework and the draft Scheme Plan for Mamre Road. A survey will be available for you to provide your feedback.

    The proposed Aerotropolis Stormwater Management Framework and draft scheme plan for Mamre Road will be on display on Sydney Water Talk from Tuesday 7 June to Sunday 24 July 2022. We welcome your feedback during this time.

Page last updated: 31 Mar 2025, 08:21 PM