Western Sydney Aerotropolis Stormwater

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On 25 March 2022, the NSW Government announced the appointment of Sydney Water as the trunk drainage authority for stormwater in the Western Sydney Aerotropolis, including the Mamre Road Precinct.

This means we will be responsible for delivering, managing and maintaining the regional stormwater network along with our drinking water, wastewater and recycled water networks.

Our plan is for stormwater to flow into natural water channels and wetlands instead of relying on buried concrete pipes or drains, as illustrated in the infographic below.

Integration of Stormwater and Recycled Water

The stormwater will then be collected in wetlands harvesting, treatment and reuse as recycled water for irrigation of parks, flushing of toilets and a cooler, greener, Western Parkland City.

The Aerotropolis integrated water system will be the largest stormwater harvesting scheme in Australia.

We will work with Penrith and Liverpool councils who will manage the non-trunk drainage stormwater network within the roads and streets.

This approach offers numerous benefits including:

• a cooler, greener Western Parkland City

• healthier waterways

• a water supply independent of climate or rainfall without using water from Warragamba Dam

• alignment with Aboriginal cultural values and Connecting with Country Framework by using the most natural and non-intrusive design

• meeting the community’s expectations for contemporary urban planning and environmental protection

• more land for development, that otherwise would have housed water infrastructure

• supports growth of surrounding industrial precincts.

Stormwater infrastructure will be delivered gradually over the next 10-20 years in alignment with the predicted completion of the precincts to minimise and manage the impacts of development as it occurs in the Aerotropolis.

We have already developed high-level plans for the precincts’ integrated water systems, which are available with the Precinct Plans on the NSW Department of Planning and Environment website.

We are preparing a detailed business case for further consideration by government.

Sydney Water is continuing consultation with the Department of Planning and Environment and Western Parkland City Authority on the process for acquisition. The stormwater schemes are still in the planning phase so it will be some time before there are construction activities or acquisitions.

Please visit this page regularly as we will be posting regular updates as the project progresses.

On 25 March 2022, the NSW Government announced the appointment of Sydney Water as the trunk drainage authority for stormwater in the Western Sydney Aerotropolis, including the Mamre Road Precinct.

This means we will be responsible for delivering, managing and maintaining the regional stormwater network along with our drinking water, wastewater and recycled water networks.

Our plan is for stormwater to flow into natural water channels and wetlands instead of relying on buried concrete pipes or drains, as illustrated in the infographic below.

Integration of Stormwater and Recycled Water

The stormwater will then be collected in wetlands harvesting, treatment and reuse as recycled water for irrigation of parks, flushing of toilets and a cooler, greener, Western Parkland City.

The Aerotropolis integrated water system will be the largest stormwater harvesting scheme in Australia.

We will work with Penrith and Liverpool councils who will manage the non-trunk drainage stormwater network within the roads and streets.

This approach offers numerous benefits including:

• a cooler, greener Western Parkland City

• healthier waterways

• a water supply independent of climate or rainfall without using water from Warragamba Dam

• alignment with Aboriginal cultural values and Connecting with Country Framework by using the most natural and non-intrusive design

• meeting the community’s expectations for contemporary urban planning and environmental protection

• more land for development, that otherwise would have housed water infrastructure

• supports growth of surrounding industrial precincts.

Stormwater infrastructure will be delivered gradually over the next 10-20 years in alignment with the predicted completion of the precincts to minimise and manage the impacts of development as it occurs in the Aerotropolis.

We have already developed high-level plans for the precincts’ integrated water systems, which are available with the Precinct Plans on the NSW Department of Planning and Environment website.

We are preparing a detailed business case for further consideration by government.

Sydney Water is continuing consultation with the Department of Planning and Environment and Western Parkland City Authority on the process for acquisition. The stormwater schemes are still in the planning phase so it will be some time before there are construction activities or acquisitions.

Please visit this page regularly as we will be posting regular updates as the project progresses.

  • Final Draft Stormwater Developer Works Policy – Mamre Road and Aerotropolis Initial Precincts

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    Following public consultation commencing in late 2023 and concluding on 11 January 2024 Sydney Water has further refined the draft Stormwater Developer Works Policy for the Mamre Road and Aerotropolis Initial Precincts. The Policy stipulates how developers will be reimbursed for the design and construction of regional stormwater infrastructure on behalf of Sydney Water in these precincts.

    We know that the details of the policy have the potential to influence the approach to development in these areas. In order to ensure all relevant feedback is captured, we have provided a copy of the Final Draft of the policy and Appendix A (Inclusions & Exclusions). We will accept concise and material comments from stakeholders for a period of two weeks commencing on 16 September.

    Written responses should be sent to aerostormwater@sydneywater.com.au and will be accepted until close of business 30 September 2024. We will review these responses and make appropriate updates before finalising the policy by late October 2024.

    Please note:

    Sydney Water is finalising the NSW Government approval process for funding of the Mamre Road Stormwater Scheme and is currently in the process of scheme planning and optimisation for the Aerotropolis Initial Precincts.

    Once Development Servicing Plans have been registered with IPART for these areas, Sydney Water can enter into commercial agreements with developers and landowners for the funding of developer delivered stormwater infrastructure. Consequently, any expenditure by a developer / landowner on stormwater infrastructure prior to finalisation of this approval process remains at their own risk. Until then, Sydney Water will not take ownership of, nor reimburse costs associated with stormwater infrastructure or servicing. Where works are proposed in advance of this, Sydney Water is open to discussing arrangements to enable future reimbursement in accordance with the Policy. This may be in the form of a Letter of Intent, as noted in the Policy.

    IPART is currently undertaking an independent efficiency review of the Mamre Road Stormwater Scheme. The findings of this review may influence the future content of this policy.

    ________________________________________________________________________________________________________

    Update on Final Draft Stormwater Developer Works Policy

    The consultation period is now closed. We would like to thank all participants for their involvement and appreciate the valuable contributions made during this process.

    Next Steps:

    We will consider the relevant matters raised in the feedback received in the finalisation of the Stormwater Developer Works Policy.

    As we move forward, we encourage all stakeholders to continue engaging with us throughout the process. We value your input and look forward to working together. If you have any questions, please feel free to reach out at aerostormwater@sydneywater.com.au.

  • Western Sydney Stormwater designers list 

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    Following the EOI tendering process, Sydney Water is excited to publish the Western Sydney Stormwater Designers list. The Designers list comprises of subject matter experts for the design and delivery of large-scale, blue-green infrastructure including:


    • Passively irrigated street trees 

    • Gross Pollutant Traps (GPTs) 

    • Naturalised open channels 

    • Creek rehabilitation and/or reconstruction 

    • Large-scale wetlands 

    • Large-scale water harvesting ponds

    • Bioretention systems 

    • Pump and re-circulation infrastructure 

    • Other associated drainage infrastructure.  


    The designers list is available for developers/landowners to use within the Aerotropolis Initial Precincts including Mamre Road Precinct.

    Should you have any questions please reach out to the team at aerostormwater@sydneywater.com.au


    *DISCLAIMER* 


    The suppliers on the Western Sydney Stormwater Designers list attached have represented to us, and they have the experience and qualifications needed to do the types of work listed. We make no guarantees or warranties about their performance, commercial practices or financial viability and do not endorse any of the products or services offered.

    We advise you to be diligent in selecting a supplier with the appropriate capability and to obtain a number of quotes to increase your confidence in your decision. 

    Competencies of the individuals proposed for the project will be reviewed at the commencement of the first engagement.

  • Draft Stormwater Developer Works Policy - Engagement Outcomes Report Released

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    In late 2023, Sydney Water launched a public consultation on the draft Stormwater Developer Works Policy, seeking feedback from the development industry. The consultation ran over eight weeks, and included and online survey and a Developer Briefing Session.

    We thank the industry for taking the time to provide submissions on the Policy.

    This Engagement Outcomes Report provides an overview of the feedback shared during the consultation process and actions to be taken by Sydney Water. This feedback is being used to inform the finalisation of the Policy.

    Please note: Sydney Water is nearing finalisation of the NSW Government approval process for funding of the Mamre Road Stormwater scheme. Once approval is granted and the Development Services Plan has been registered with IPART, Sydney Water can enter into commercial agreements with developers and landowners for the funding of developer delivered stormwater infrastructure. Consequently, any expenditure by a developer / landowner on stormwater infrastructure prior to finalisation of this approval process remains at their own risk. Until then, Sydney Water will not take ownership of, nor reimburse costs associated with unapproved stormwater infrastructure or servicing.

  • Updated: Mamre Rd Precinct Stormwater Scheme Plan

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    Sydney Water have reviewed and updated the Mamre Road Precinct Integrated Stormwater Scheme (the scheme plan). Minor changes have been made to:

    1) Including the non-potable water network and associated assets

    2) Improving the efficiency of the basins by ensuring the optimal asset depths and layouts

    3) Maximising RE1 land within the precinct by reducing Sydney Water asset footprints on RE1 land

    4) Reducing the Development Service Plan (DSP) costs by reducing severance risk on key land parcels

    The updated Scheme Plan can be viewed on the Sydney Water website https://www.sydneywater.com.au/plumbing-building-developing/developing/land-development/aerotropolis-stormwater-development-requirements.html and in the related documents section of this page.

  • Community Information Session 4 May 2024 - Aerotropolis and Mamre Rd Precincts

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    We are pleased to announce Sydney Water, together with the Aerotropolis Independent Community Commissioner Roberta Ryan, is hosting a community drop-in session between 10:00am to 1:00pm on 4 May 2024 at Bringelly Community Centre.

    NSW Government agencies, as well as Penrith and Liverpool council, will be in attendance to provide information and answer questions about developments in the Western Sydney Aerotropolis and Mamre Road precincts.

    Please refer to the attached invitation flyer for further details and a list of agencies attending.

    We look forward to seeing you there.

  • 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

Page last updated: 22 Oct 2024, 01:02 PM