Rainwater, spear water and island independence.

Off-grid water can work well, but it is a household system—not an invisible utility. Roofs, gutters, tanks, pumps, filters, groundwater equipment and wastewater arrangements all need their own checks.

Homes designed for 100% off-grid living

Couran Cove’s privately owned homes operate as off-grid homes rather than ordinary mainland houses connected to conventional household utilities. That can include solar and battery power, bottled gas, rainwater storage and groundwater systems. “Off-grid” does not mean “maintenance-free”, and the equipment and condition visible at one home do not prove what serves another home.

For property decisions, ask for a written system inventory: source, tank capacity, pump model, filter stages, treatment equipment, installation records, maintenance history, recent laboratory results, power demand, spare parts and the method used when rainfall or supply is low.

Rainwater systems

A rainwater system normally collects roof runoff through gutters and downpipes, diverts the first dirty flow, screens insects and debris, stores water in a tank and uses a pump to supply selected fixtures. Filters or disinfection may be added according to the intended use and a water-quality assessment.

Queensland Health guidance stresses routine maintenance: keep the roof and gutters clean, check first-flush devices, protect openings from mosquitoes and vermin, inspect the tank and pipework, manage sediment and follow the treatment manufacturer’s replacement schedule. Water that looks clear is not automatically safe to drink.

Spear and groundwater systems

“Spear water” is a common local term for shallow groundwater drawn through a driven point or small bore. Groundwater can vary in salinity, hardness, iron, colour, odour and microbiological quality. A system may require settling, cartridge filtration, disinfection or other treatment selected for the actual test results—not simply copied from a neighbouring property.

Queensland regulates groundwater and bore construction. The approval position depends on the location, water plan, proposed use and type of work. A person may need authorisation to construct a bore or take groundwater, and bore construction, maintenance or decommissioning must be carried out by a driller with the correct Queensland licence and endorsement where the law requires it.

Use the right licensed people

A licensed bore driller and a licensed plumber perform different work. Bore construction should be checked with the relevant Queensland water authority and a properly licensed driller. Regulated plumbing and drainage work must be performed by a QBCC-licensed plumber or drainer with the appropriate occupational and contractor arrangements.

Ask the contractor to explain whether the work is permit, notifiable or minor work; obtain the contract, invoice, equipment details and any required Form 4 or approval record; and confirm the licence independently on the QBCC register. Electrical pumps, controls and solar connections may also require an appropriately licensed electrician.

A practical property checklist

• Identify every water source and whether it is used for drinking, bathing, laundry, toilets or gardens.
• Record tank sizes, typical occupancy, pump flow and how many rain-free days the storage can support.
• Arrange independent microbiological and chemical testing appropriate to the source and intended use.
• Inspect roofs, gutters, first-flush devices, screens, tanks, overflows, pipework, pumps and treatment equipment.
• Check bore or spear approvals, driller records, plumbing approvals, QBCC licences and notifiable-work records.
• Confirm how wastewater is treated and whether that system has separate approvals, servicing and power needs.
• Budget for cartridges, lamps, pumps, tank cleaning, testing, repairs and emergency water delivery.