Sell Water From Farm Dam Storage: Legal Checks

A full dam and an interested buyer are a starting point for questions, not a reason to book a tanker. Start by identifying what the buyer wants: water collected from your storage, a transfer of water rights, or a supply agreement extending through the dry season. Put that distinction in writing before discussing a price.

As of October 2026, the NSW and Queensland agency guidance discussed below gives different starting points for checking a proposed transaction. Use those examples to prepare a property-specific enquiry, not as legal clearance for your own sale. For a property elsewhere in Australia, take the same questions to the relevant state water authority before making a commitment.

What does it mean to sell water from farm dam storage?

A physical water sale is an agreement to supply a measured quantity of water, for example by collection from a farm storage. A water-entitlement trade concerns a legal right associated with water, rather than necessarily moving the water already sitting behind your dam wall. Ask which transaction is proposed; do not use the two descriptions interchangeably in your enquiry.

Proposed arrangement	Question to resolve before agreeing
A contractor collects water by tanker	Am I authorised to supply this water for the buyer’s stated purpose?
A buyer wants a temporary water trade	What authorisation, account and approval process apply to this transaction?
A buyer wants an ongoing water right	What asset is being transferred, and what registration or consent is required?
A neighbour asks for a free load	Is off-property supply permitted, irrespective of whether money changes hands?

Prepare a sketch showing the source, dam, pump and destination. Mark whether the buyer would collect at the dam, receive water through a pipeline or take water somewhere else under a trading arrangement. Include every source used to fill the dam, rather than describing a mixed supply as rainwater because rain falls on it.

Keep this enquiry separate from the construction file. Our farm dam construction guide helps with the physical project; it should not be treated as a water-sale authorisation.

What should NSW owners check before supplying another property?

Harvestable rights concern capturing rainfall runoff in eligible farm dams, but NSW Water’s current explanation states that this water cannot be supplied to another property, so a full dam is not permission to sell its harvestable-rights water off-site (NSW Water’s basic landholder rights guidance).

Take that restriction seriously before considering any neighbour-to-neighbour arrangement. Ask WaterNSW or the responsible agency to identify the authority covering the actual water you propose to supply. Give them the property details, dam location, sources of inflow and proposed destination, together with any existing licence or approval numbers.

If a dam receives both runoff and pumped water, ask how the different sources and their conditions affect the proposal. Do not assume that filling part of a dam from a licensed source makes every litre available for sale. Request a written answer addressing the proposed supply, rather than relying on a general statement that the dam itself is lawful.

For a licensed-water proposal, ask the authority to identify any applicable trading, extraction, metering and use conditions. Metering is measurement of the volume taken or supplied. Keep the response with the licence and buyer enquiry, and have a water-law adviser review any unresolved distinction between a lawful take and the proposed onward supply.

How do Queensland water licence trades differ?

A seasonal water assignment is a temporary transfer of water available under an authorisation; Business Queensland permits the licence pathway where the water plan allows it, lists five plan areas for permanent licence relocation, and specifies a 30-business-day transfer-notice stage after the relocation information notice (Queensland water licence sale and relocation steps).

Read the named plan areas and current procedure before proposing a relocation. Treat the 30-business-day instruction as a deadline within that particular process, not an approval timeframe or a general rule for every water sale. Ask the department to identify the correct pathway for your documents and proposed buyer.

Begin with the exact authorisation name printed on your paperwork. A water licence is an authorisation with conditions governing the water activity it covers. Avoid describing every document as an allocation or every sale as a licence transfer: send a copy to the department and ask which rules apply to it.

For physical tanker collection, describe that arrangement explicitly rather than assuming a seasonal assignment answers the question. Identify where the water would be taken, where it would be used and who would operate the pump. Our Queensland farm dam licence guide addresses source and construction checks; obtain separate advice on the proposed sale.

What changes when water carting supplies drinking water?

Water carting means transporting water in a vehicle-mounted tank. Ask the buyer to specify the destination and intended use, including whether the water will enter a household supply or be used around food. Do not describe untreated farm dam water as drinking water on the strength of its appearance.

NSW Health says drinking-water carters must notify their local council, implement a quality assurance program and provide it to the local Public Health Unit, while specified supplier, delivery and tank-cleaning records must be retained for at least six months (NSW Health requirements for water carters).

A quality assurance program is a documented system for managing the safety of a drinking-water supply. Before offering water for that purpose, ask the Public Health Unit to assess your proposed source and responsibilities. Do not substitute a contractor’s assurance that a tank is clean for advice about whether the source and supply system are suitable.

For a non-drinking-water proposal, ask the buyer for a written specification and obtain advice on appropriate testing. Our farm dam water-quality guide can help frame the questions, but it is not certification of any particular load. Agree how unsuitable water, rejected deliveries and changes in water condition would be handled before collection starts.

How much water could you commit to a buyer?

Build a conservative water budget before offering a quantity. A water budget is an accounting of water available, expected additions, losses and planned uses over a stated period. Keep the physical estimate separate from the quantity the authority confirms may lawfully be supplied, and use the lower relevant limit when considering a commitment.

For an illustrative calculation only, suppose a measured storage holds 2 ML, with 1.2 ML reserved for the farm and a further 0.3 ML allowed for unavailable water and expected losses. The remainder is 0.5 ML, equivalent to 25 hypothetical loads of 20 kL, not a recommendation to sell that amount.

Here ML means megalitres and kL means kilolitres. Replace every assumption with site measurements and an agreed planning period before using the calculation, and do not count forecast rain as delivered water. Decide what minimum water level ends collection, who checks that level and what happens if the source becomes unsuitable.

Ask your adviser to put those limits into the agreement alongside volume measurement, collection times, payment, access responsibilities and cancellation conditions. For a continuing supply, specify when the arrangement will be reviewed. A promise to supply whenever a buyer calls is not a substitute for a defined quantity and a stop condition.

What site checks belong before the first collection?

At Big Ditch, we recommend resolving the authority question before spending money on loading facilities. Then assess whether the proposed vehicle can enter, turn and stand safely without relying on an unassessed dam crest or bank. Ask for the actual vehicle details and proposed collection method rather than designing around an unspecified tanker.

1. Identify the source and attach the relevant licence or rights documents.
2. Describe the buyer, destination, intended use and collection method.
3. Obtain the authority’s written response before committing to supply.
4. Measure available storage and retain a defined farm reserve.
5. Assess vehicle access, standing area and pumping arrangements.
6. Document testing, measurement, payment and stop conditions with your adviser.

Lindsey Hughson’s retained Big Ditch close-out correspondence for a Lorne, NSW dam in 2019 records completion of the project and 76.5 excavator hours. That record supports a completed construction job, not an approved water-selling operation or a drinking-water result.

Keep the same distinction in your own file: a completed dam, a measured volume and a proposed buyer each answer different questions. If you need help assessing the physical storage and access, send Big Ditch your dam and collection-site details. We can discuss the site work without representing a contractor’s inspection as regulatory approval.

Frequently asked questions

Can I give dam water to a neighbour instead of selling it?

Do not assume a free supply solves the permission question. Ask the water authority to assess the proposed off-property supply using the actual source, rights and destination, regardless of payment. For a NSW harvestable-rights proposal, use the restriction discussed above as the starting point. Put any advice in writing before arranging collection, and do not describe a gift as permission to move otherwise restricted water.

Does a water sale mean a tanker collects from my dam?

Specify that in the proposal rather than assuming it. Ask whether the buyer wants physical water from your storage or a transaction involving a water authorisation, and identify the extraction and delivery locations. Have the authority or adviser confirm the paperwork for that arrangement. For collection from your property, also agree who provides the pump, how volume is measured and when collection must stop.

Can Big Ditch approve a water-selling business?

No. We can help define and inspect the physical dam project, but do not replace a water authority, public-health assessment or legal adviser. Bring the written regulatory advice to the site-planning discussion so that proposed works match the permitted activity. Ask separately about storage, access and the equipment needed, and avoid commissioning new works while the proposed right to supply remains unresolved.

Planning to sell water from farm dam storage? Book a site inspection with Big Ditch and assess the storage before agreeing to supply.