Everyday water · AquaTrace
Bottled water vs tap water: which contains more microplastics?
It is easy to assume bottled water must be the cleaner option. When it comes to microplastics, the answer is much less simple — and often much more personal.
The short answer
Microplastics have been detected in both bottled and tap water. Some studies have found more in bottled water, but there is no rule that one will always be better than the other.
Why bottled water is not automatically cleaner
Bottled water can feel reassuring because it arrives sealed and packaged. But the water still has a source, a treatment process, a bottling line, a container and a cap — all before it reaches you.
Research has found microplastics in packaged water, and plastic packaging is one possible contributor. That does not mean every bottle is heavily contaminated. It simply means that buying water in a bottle does not automatically remove microplastics from the picture.
What about tap water?
Tap water has a different journey. It moves through water treatment and the distribution network before travelling through the plumbing and fixtures in your home.
Australian drinking-water supplies are managed by state and territory arrangements informed by the Australian Drinking Water Guidelines. Microplastic screening is a separate household information question rather than a substitute for regulated water-quality management.
So which should I drink?
There is no useful blanket rule that says tap or bottled water will always contain fewer microplastics. Results vary by source, product and the way testing is performed.
If microplastics are the reason you are deciding between them, testing the actual water you drink is more relevant than relying on an international average.
A direct comparison can answer a better question
Instead of asking whether bottled water is better in general, you can ask: how does this bottle compare with the water from my tap?
When two samples are analysed in the same way, you get a direct comparison that relates to your household and your choices. AquaTrace can show the number and characteristics of particles detected, representative images and AI-assisted polymer classifications in a format designed to be easy to understand.
Our approach at AquaTrace
AquaTrace does not assume that one source is inherently better. Our role is to help customers replace assumptions with information about the water they actually use.
If the result shows little difference, that is useful. If it shows a noticeable difference, that is useful too.