Treatment Plant
Water tested here
Monitored
What's really in your tap water?
Start with your area's water supply data, based on the latest Seqwater reporting. See what's entering your neighbourhood, and learn why that's only part of the story.
Seqwater Data
Instant Results
Free Access
Based on publicly available Seqwater data for your distribution zone. This data covers water quality at treatment and distribution level - before the last mile of pipes to your home. For a complete picture of what’s at your tap, keep reading.
Backed by data, not sales tactics
Sourced from public Australian water data.
SEQ
Source, store, and treat water in South East Queensland
NHMRC
National Health and Medical Research Council.
ADWG
Drinking Water Guidelines
All data sourced from publicly available Seqwater reporting for South East Queensland.
The Last Mile
The data above tells part of the story. Here's the rest.
Water quality is tested at the treatment plant and monitoring points in the distribution network. But between those points and your tap, water travels through the last mile, and that changes everything.
Distribution Network
Sampling points
Monitored
Local Pipes
Ageing infrastructure
Not Tested
Your Plumbing
Your responsibility
Not Tested
Your Tap
What you actually drink
Not Tested
Ageing infrastructure
Ageing infrastructure
Decades-old pipes can introduce sediment, metals, and biofilm into water that tested clean at the monitoring point.
Chlorine decay
Chlorine decay
Disinfectant levels decrease as water travels. Homes further from the plant may have significantly less protection.
Your property's plumbing
Your property's plumbing
Older homes with copper, lead, or galvanised pipes can add contaminants no public dataset accounts for.
Even a lab test only captures one moment.
Water quality isn't static. It changes with the seasons, weather events, treatment adjustments, and network conditions. The water you test today is not the same water you'll drink tomorrow. The water in February is not the same as August. That's not a scare tactic, it's physics and chemistry.
The real answer to “what is really in your tap water?” isn't a single test. It's a system that filters continuously, regardless of what's in the supply on any given day.
The Full Picture
We believe you deserve the full picture.
Honest, well-sourced explanations of how your water is treated, what the regulations say, what's changing, and where the system has room to improve.
Key Investigation
The Reporting Gap: Why Your Tap Water Isn’t Tested — And What That Means for Australian Homes
An in-depth look at how water quality is monitored in Australia, why testing stops before the last mile, and what it actually takes to get a real answer about your water.
Read our analysis
Explainer
How your water gets to your tap
From catchment to treatment plant to your kitchen, the full journey most people don't think about.
Read the full explainer
Guide
What the guidelines actually require
The ADWG sets the benchmark, but they're guidelines, not enforceable standards. Here's what that means.
Understand the guidelines
2026 Update
What to Watch in 2026: PFAS, Microplastics & the Future of Drinking Water in Australia
PFAS, microplastics, disinfection byproducts and new water science. What’s changing in Australian drinking water in 2026 and what it means for your tap.
See what's emergingData Breakdown
Seqwater's reporting: what it covers
What their reports include, what they don't, and how to read the numbers like a professional.
View our breakdownHOW IT WORKS
Getting real clear about your water
Whether you start with our free postcode data, a lab-grade tap test, or a full water assessment, we meet you where you are.
1. Understand your water
Start with your area's supply data. Want to go deeper? We facilitate lab-grade testing through our partners at the University of New South Wales
2. Design the right solution
Based on your data, your property, and your household's needs, a system that works continuously, not just on the day you test. If filtration isn't the answer, we'll say so
3. Install and support it properly
We manage the entire process and work with trusted installation partners we've vetted ourselves. Professional installation, ongoing support, and one point of contact throughout.
Clear steps. Clear expectations. No pressure.
Part of something bigger
OneWater Australia is part of the One(X) Australia group, alongside One Solar Australia and One Finance Australia. Our laboratory testing is facilitated through our partnership with the University of New South Wales.
Our systems are designed specifically for Australian conditions and meet strict national standards. From assessment to installation and ongoing support, we manage the process end-to-end with trusted partners we stand behind.
OW
OneWater
Water Filtration
OS
One Solar
Solar Energy
OF
One Finance
Finance Solutions
UNSW
UNSW
Lab Testing Partner
ADWG
ADWG
Guidelines Compliant
NATA
NATA
Accredited Testing
What People Notice When They Switch
Testimonials
"We were the first home in Victoria to have OneWater installed, and honestly we weren't sure what to expect. The team made the whole thing easy — they fitted the full home system plus the kitchen faucet in a day, walked us through everything, and left the place spotless. The difference is something you notice straight away: the water tastes cleaner, the shower feels softer, and we're not second-guessing what's coming out of the tap anymore. So glad we did it."
Kaine & Niomi
Homeowners, Laverton, Melbourne
Your water changes every day. Your confidence in it shouldn't.
Public data shows what's entering your area. A lab test shows what's at your tap right now. A whole-home system gives you consistent quality, every day. We'll help you understand which level of clarity is right for you.
NO OBLIGATION
No pressure
Just Honest Answers