Bore water can contain hardness, iron, manganese, salinity, nitrate, microbes or other location-specific substances.
Evidence snapshot
- NHMRC (2025): The Australian Drinking Water Guidelines are a risk-management framework, not a single national pass/fail law. They separate health-based, aesthetic and operational considerations.
- World Health Organization (2026): WHO evaluates household treatment against separate bacteria, virus and protozoa targets. A general 'antibacterial' statement is not the same as validated protection across all pathogen classes.
- HealthyWA (2024): HealthyWA advises that bore water used for drinking should be tested at least annually for chemical and microbiological contamination by a NATA-registered laboratory.
These figures and standards are reference points, not a diagnosis of one home. Local water data, premises plumbing, flow and maintenance determine how they apply.
Start at the source, not at the filter housing
Start with the property itself. Use a laboratory method suitable for the named analyte and keep the sample conditions and units visible. For lead, sampling after stagnation can reveal a premises-plumbing contribution that a flushed network sample may miss. Any reduction claim should name the exact model, test standard, flow, capacity and replacement point.
Where the claim stops
The correct process cannot be selected from appearance alone.
In a bore water treatment assessment, the evidence boundary matters. Walk the whole source-to-tap pathway. Inspect catchment, storage, pumps, overflow, first flush and pipework before specifying treatment. Correct problems at the source where possible, then use barriers with defined jobs. During floods, bushfires or an official advisory, the health authority's instructions take priority over the normal treatment routine.
Measure flow and pressure under the same conditions
Test a representative sample through an appropriate laboratory, record pump flow and pressure, and design for the actual chemistry.
Check the conditions that can move the result: flow, pressure, temperature, water chemistry, media quantity, treated volume and time since service. A technology can be well suited in principle and still be undersized or poorly maintained in practice. Put the relevant operating range into the proposal.
What belongs in the written plan
A generic carbon cartridge is not a complete bore-water treatment plan.
Decide how the claim will be checked after installation. That may be a pressure reading, service-volume record, alarm status, hardness test or matched laboratory samples. Also write down who acts when the trigger is reached. A result without a maintenance response is not a complete treatment plan.
A practical household check
| Record | What to capture | Why it changes the decision |
|---|---|---|
| Source | Inspect catchment, tank or bore | Controls risks before treatment |
| Test | Use an appropriate accredited laboratory | Defines chemical and microbial jobs |
| Barrier plan | Assign maintenance to every stage | Keeps protection working |
Use the same notes when requesting more than one quote. Suppliers then have to answer the same water, flow and ownership brief rather than redefining the problem around their preferred product.
Where Water Analytics Australia fits
WAA can help translate the source-water result into a multi-barrier design, but official health directions come first. The proposal should identify the source risk, each treatment barrier, design flow, alarms or service triggers and the verification plan. UV, sediment control, carbon and RO can all have a role; none should be presented as a universal answer. Installation and ongoing work must follow the current product instructions and applicable plumbing requirements.
Related WAA guides
- Rainwater for Drinking: A Complete Australian Risk and Treatment Plan
- After a Flood or Bushfire: Is Your Tank Water Safe?
- WAA Full Home Water Refining Systems
Common questions
Is clear tank or bore water automatically safe?
No. Clarity does not rule out microorganisms or dissolved chemicals. Inspect the source and use the testing and health guidance appropriate to the intended use.
What is the most useful measurement?
Use the measurement that matches the decision. Walk the whole source-to-tap pathway. Inspect catchment, storage, pumps, overflow, first flush and pipework before specifying treatment. Correct problems at the source where possible, then use barriers with defined jobs. During floods, bushfires or an official advisory, the health authority's instructions take priority over the normal treatment routine.
What should WAA receive before recommending a system?
Provide the postcode, water source, household size, bathroom count, busiest-use pattern, observed issue, desired result and any laboratory report with its units and sample point.
Sources and further reading
- NHMRC: Australian Drinking Water Guidelines, version 4.0
- World Health Organization: International Scheme to Evaluate Household Water Treatment Technologies
- HealthyWA: Bore water
The next useful step
Write down the source, the result you want, peak-use flow and the evidence already available. Then ask for a recommendation that gives every stage a defined job, states the operating assumptions and includes the service plan. That is enough detail to compare a WAA proposal with any alternative without relying on fear or brochure language.