Are flushable wipes safe to flush? What the testing shows

Mostly, no. Independent testing keeps finding that wipes hold together far longer than a sewer needs them to. In Australia the one exception is a product that carries the official flushable symbol and states compliance with AS/NZS 5328. Everything else belongs in the bin.

If you just want the rules and the myths, we’ve covered those in flushable wipes myths. This post is the evidence: what the tests actually do, what they’ve found, and how to use that when you’re standing in the supermarket aisle.

Why wipes and sewers don’t mix

A good wipe is strong when it’s wet. That’s the whole point of it. Fibres are bonded so the wipe doesn’t shred in your hand. Toilet paper is engineered the other way round: it loses strength almost as soon as it hits water.

Sewers are also gentler than you’d think. Long, slow-moving pipe runs, bends and pump stations don’t do much shaking. A wipe that only breaks up under vigorous agitation can sail through a lab beaker test and still arrive at a pump station in one piece.

What independent testing has found

Pipe tests: 101 wipes, none passed

In 2019, the Flushability Lab at Toronto Metropolitan University (then Ryerson) built a model of a typical home drain system, from toilet to sewer, with bends, slope and normal water pressure. They tested 101 single-use products, 23 of them labelled flushable. None broke down enough to pass safely through the system.

Material analysis: more than half were blends

A 2023 review by Cardiff University researchers in Science of the Total Environment found that more than half of the biodegradable and flushable wipes examined combined cellulose with poorly degradable synthetic fibres, and that additives can slow breakdown further. Cellulose fibres break apart physically fairly easily, the authors note, but full breakdown in the environment is much harder to achieve.

River tests: still intact after five weeks

The same Cardiff group then tracked two cellulose-based wipe brands labelled biodegradable in ten urban rivers. Most were still intact after five weeks. Wipes with more natural cellulose broke down more than twice as fast as those dominated by regenerated cellulose. The researchers called for clearer eco-labels and better testing standards.

Beaches: wipes carry bacteria

Researchers at the University of Stirling found harmful bacteria, including E. coli, surviving on wet wipes washed up on beaches, published in Marine Pollution Bulletin. A wipe that escapes the system doesn’t just sit there; it can carry what it was used to clean.

How Australia now tests “flushable”

Australia and New Zealand are ahead here. AS/NZS 5328 Flushable Products, published in 2022, gives manufacturers test methods and labelling rules. Products have to pass six tests to carry the flushable symbol. According to the Australian Water Association, one test requires items to break into small pieces within an hour, and products must contain no plastic.

It’s voluntary, though. So the word “flushable” alone still doesn’t tell you much. The Water Services Association of Australia’s advice, reported by South East Water, is simple: check for the flushable symbol. No symbol, into the bin. Barwon Water says the same: wipes with a do-not-flush label, or no label at all, go in the bin.

How to read a wipes pack in 20 seconds

1. Look for the AS/NZS 5328 flushable symbol. That’s the only flushable claim with an Australian test behind it.
2. Ignore “plant-based”, “natural” and “biodegradable” as flushing advice. They describe materials, not how fast something falls apart in a pipe.
3. Check the material. Polyester, polypropylene or vague “synthetic fibres” mean plastic is in the mix.
4. Find the disposal instruction. A good pack tells you exactly where it goes.

A wipe built for the bin, and for the wash

ZERO wipes skip the flushing question entirely. They’re dry wipes made from timber viscose (wood pulp), and you add water when you need them. No pre-soaked solution means no preservatives or fragrance, and they’re OEKO-TEX® STANDARD 100 Class 1 certified.

• ZERO Cleaning Wipes: use dry or damp on benches, spills and the bathroom. Reusable.
• ZERO Baby Wipes: reusable and machine washable, for nappy changes and sticky hands.
• ZERO Makeup Wipes: same dry, reusable format for your face.
• ZERO Reusable Cleaning Cloths: absorbent timber viscose cloths for the jobs that used to eat a whole pack of wipes.

Use them, wash them, use them again. When they’re finished, bin them. Never flush.

FAQ

Are any wipes safe to flush in Australia?
Only products that carry the flushable symbol and state compliance with AS/NZS 5328. If it’s not on the pack, bin it.

Do lab tests reflect real sewers?
Not perfectly. Real sewers have grease, roots and thousands of wipes clumping together, so a wipe that struggles in a lab usually does worse in the real world.

What happens if I’ve flushed wipes for years?
Nothing dramatic, hopefully. Just start binning them from today. If drains are running slowly, get a plumber to take a look.

Next up: biodegradable vs compostable wipes and what those labels really mean.