Can You Drink Bore Water? Treatment Options for WA Properties
Can You Drink Bore Water? Treatment Options for WA Properties
If you've got a garden bore (or you're thinking about installing one), it's a fair question to ask: could this water also be used for drinking, not just irrigation?
The honest answer is: it depends on what's in it, and that's a risk-based decision, not a simple yes or no. Bore water comes straight from the ground, untreated, and its quality varies significantly from one property to the next, even between neighbours on the same street. Some bores produce water a household could reasonably drink; others don't. The only way to know which category yours falls into is testing.
In this guide, we'll look at what the drinking water guidelines actually measure (and why "doesn't meet the guidelines" isn't the same as "dangerous"), how to work out what you're dealing with, and which treatment options address which risks.
What the Guidelines Actually Measure
The Australian Drinking Water Guidelines (published by NHMRC/NRMMC) are the benchmark scheme water is managed against, and they're very precise, but it's worth understanding what that precision covers.
The guidelines set two quite different kinds of values. Health-based values cover things that can actually make you ill: E. coli, nitrates, certain trace metals. Aesthetic and operational values cover things like pH, hardness, iron and taste, and many of these exist to protect infrastructure rather than people. pH adjustment, for example, is largely about stopping water from corroding pipes, fittings and hot water systems, not about preventing illness.
That distinction matters. Water can fall outside the guidelines on aesthetic parameters and still be perfectly reasonable to drink. Plenty of Australians drink rainwater from tanks every day, and rainwater frequently wouldn't tick every ADWG box either, particularly on pH, which is naturally slightly acidic. Households drink it anyway because the actual health risk, assessed sensibly, is low.
So the real question isn't "does my bore water meet every guideline value?" It's "which values does it miss, and are those the ones that matter for health?"
Why Most Garden Bores Aren't Set Up for Drinking Water
Garden bores across the South West are typically designed and installed with irrigation in mind, not drinking water supply. That changes the whole approach, from casing and screen selection through to whether any treatment equipment is fitted at all.
This is one reason our earlier guide on bore water vs scheme water draws such a clear line between the two: scheme water is treated and continuously monitored against the guidelines before it reaches your tap, while bore water carries no such assurance unless you build it yourself. You can find that guide and others on the Australind WBC blog.
For most homeowners, that's a perfectly reasonable trade-off: irrigation doesn't require drinking-water standards, and treating an entire property's outdoor water use to that level would be unnecessarily expensive.
What Could Be in Untreated Bore Water?
The specific risks vary by location, depth and geology, but they sort into categories with very different risk profiles.
| Contaminant Type | Common Examples | Risk Profile |
|---|---|---|
| Microbial | Bacteria, coliforms, E. coli | Genuine health risk, can cause illness quickly if consumed |
| Chemical | Nitrates, trace metals | Health risk at elevated concentrations; depends on the level found |
| Aesthetic/Mineral | Iron, salinity, hardness, pH | Rarely a health issue, mainly affects taste, staining and plumbing |
This is the risk-based lens in practice. A bore with elevated iron and slightly low pH presents a very different decision to a bore with E. coli present. The first is a taste-and-plumbing conversation; the second is a genuine health hazard until disinfection is in place. Coastal properties in the South West often sit in the first camp, dealing more with salinity and minerals than microbial contamination, but proximity to septic systems, livestock or surface water can shift that. HealthyWA's guidance on bore water is a useful starting point for understanding these risks in more detail.
Step 1: Test Before You Do Anything Else
A risk-based decision needs data, and testing is the only place that data comes from. This is the step that's skipped most often, and it's the one that actually tells you which risks you're managing.
A basic residential test panel typically covers:
Total coliforms and E. coli (the health-critical microbial check)
pH and total dissolved solids (TDS)
Salinity/electrical conductivity
Iron and other common minerals
Nitrates
Testing should be done through an accredited WA laboratory, following WA Department of Health guidance on water quality, and it's worth repeating periodically, since groundwater quality isn't static. Seasonal rainfall, nearby land use changes, and even bore maintenance issues (like a cracked casing letting surface water in) can all shift results over time, which means the risk picture can shift too.
Treatment Options for Bore Water
Once you know which risks are actually present, treatment becomes a matching exercise: pair the problem with the method that solves it.
| Method | Addresses | Limitations |
|---|---|---|
| Sediment/carbon filtration | Particles, taste, odour (aesthetic) | Doesn't address bacteria or dissolved salts |
| UV disinfection | Bacteria and pathogens (health) | Requires clear (pre-filtered) water to work properly |
| Chlorination | Bacteria (health) | Needs correct dosing and monitoring |
| Reverse osmosis | Salts, minerals, most contaminants | Higher upfront and ongoing cost; lower flow rate |
| Boiling | Short-term microbial safety (health) | Not practical daily; doesn't remove chemicals or salts |
Most residential setups combine two or three of these, and the combination should follow the test results, not a template. If your only issue is iron staining, a UV system adds cost without reducing any risk you actually have. If E. coli is present, filtration alone leaves the one risk that matters untouched.
Matching Treatment to Actual Risk
It's worth being realistic here. Treatment systems are good at solving specific, known problems, they're not a blanket fix, and not every guideline exceedance justifies one.
Where treatment clearly pays off:
Bacterial contamination (UV, chlorination), this is the non-negotiable health risk
Sediment and turbidity (filtration)
Taste and odour issues you actually care about
Where the risk-based case gets weaker:
Chasing full guideline compliance on aesthetic parameters that pose no health risk
High salinity across the whole property (reverse osmosis works, but usually only stacks up for a dedicated drinking-water line)
Highly variable water quality without ongoing monitoring, treatment sized for last year's results may not match this year's water
This is why most South West properties that treat bore water do so for a single point of use (like a kitchen tap) rather than trying to bring the entire bore output up to full ADWG compliance. It's the same judgement rainwater drinkers make: manage the risks that matter, at the point that matters.
Common Uses for Bore Water Even Without Drinking Treatment
For the vast majority of homeowners, bore water continues to do exactly what it was installed for:
Lawn and garden irrigation
Washing driveways and outdoor areas
Topping up pools (though this comes with its own considerations around salinity and staining, which we've covered separately)
There's nothing wrong with leaving it at that. Treating water for drinking is a meaningful investment, and for many properties the risk-versus-cost equation simply doesn't favour it once irrigation needs are already being met.
How Australind WBC Can Help
If you're weighing up whether your bore water could realistically be used for drinking, the most useful starting point is an honest, evidence-based assessment, not a sales pitch.
Australind WBC can help by:
Reviewing your bore's construction and depth to understand what's feasible
Pointing you toward appropriate testing so decisions rest on data, not assumptions
Being upfront about which results genuinely warrant treatment, and which are aesthetic issues you can reasonably live with
You can learn more about our water bore drilling services or request a property assessment if you'd like to explore your options.
Frequently Asked Questions
Can you drink bore water in Western Australia? It depends on what testing shows. Untreated bore water shouldn't be drunk until you know what's in it, but once tested, the decision is about actual health risks, not a blanket rule.
Does bore water have to meet the Australian Drinking Water Guidelines? For a private bore, meeting the guidelines isn't legally required, they're the benchmark for public supplies. Many guideline values are aesthetic or asset-protection measures (like pH adjustment for pipework) rather than health limits. What matters is whether the health-based values are met.
Is rainwater held to the same standard? No, and that's the point. Tank rainwater often wouldn't meet every ADWG value, yet Australians drink it routinely because the assessed health risk is low. Bore water deserves the same risk-based thinking, backed by testing.
Does boiling bore water make it safe? Boiling kills most bacteria and pathogens, but it won't remove dissolved minerals, salinity or chemical contaminants. It's a reasonable short-term measure against microbial risk, not a long-term solution.
How often should drinking-intended bore water be tested? At minimum, annually, and more frequently if you notice changes in taste, colour or clarity, or after any maintenance work on the bore itself. Risk assessments are only as current as the data behind them.
Final Summary
So, can you drink bore water?
It's a risk-based decision: not a blanket no, the question is which risks your water actually carries
The guidelines aren't all about health: many ADWG values protect pipes and taste, not people; rainwater drinkers make this trade-off every day
Testing comes first: you can't assess risk without knowing what's in the water
Treat the risks that matter: disinfection for bacteria is non-negotiable; chasing aesthetic compliance often isn't worth it
Irrigation remains the practical default for most South West properties, and that's a perfectly good outcome
If you're curious whether your property's bore water could be a candidate for drinking use, start with testing and a professional assessment, then make the call on evidence, not assumptions.