Queensland Water and Your Hair: What Brisbane and Gold Coast Tap Water Really Does

If your hair has felt different since moving to Queensland, or since a holiday somewhere else, the water is usually the first suspect. Hard water, chlorine, the pool, the beach: each gets blamed for dryness, dullness, breakage and sometimes hair loss.

Some of that blame is deserved. A lot of it is not. To find out which is which, we went to the source: the water quality reports published by the utilities that supply Brisbane and the Gold Coast, and the research that has actually tested water against hair. This guide sets out what we found and what is genuinely worth doing about it.

How hard is South East Queensland's water?

Water hardness is a measure of dissolved calcium and magnesium, reported in milligrams per litre (mg/L) as calcium carbonate. The Australian Drinking Water Guidelines set an aesthetic guideline of 200 mg/L for total hardness. It is not a health limit. It reflects the practical effects of harder water, which makes soap and shampoo lather less easily and leaves scale deposits.^[1][2]

Here is what the utilities themselves report:

• Brisbane and Ipswich. Urban Utilities' annual report for 2023-24 gives an average total hardness of about 100 mg/L for the South East Queensland supply system that serves Brisbane and Ipswich.^[1]
• Gold Coast. Seqwater's water quality reporting for the Gold Coast area shows an average hardness of about 38 mg/L over the 12 months to September 2026, with readings ranging from 21 to 130 mg/L. These figures describe the bulk water Seqwater supplies, before it travels through local pipes to individual homes.^[2]

Both are comfortably below the 200 mg/L guideline, and the Gold Coast supply is notably soft. Hardness does vary by suburb, by season and by which treatment plant is feeding your area at the time, so treat these as typical figures rather than a reading for your street. If you want to check your own area, Urban Utilities publishes annual drinking water reports and Seqwater publishes monthly reports by region.

What the research says about hard water and hair

Hard water is often said to cause breakage and even hair loss. Only a handful of studies have tested this directly, and the detail of what they used matters a great deal.

A 2013 study from India took shed hair from 15 women and soaked half of each sample in hard water and half in distilled water, for 10 minutes every second day over a month. The hard water contained 212.5 ppm (roughly equivalent to mg/L) of hardness, which is already above the Australian aesthetic guideline. The researchers found no difference in the strength or elasticity of the hair between the two groups.^[3]

Two studies from Pakistan reached a different conclusion. In the first, published in 2016, researchers took hair from 76 men and treated half of each sample with the hardest tap water they could find in their region, for 10 minutes every second day over three months. That water measured 486.7 mg/L. Hair treated with it was about 7 percent weaker than hair treated with deionised water.^[4] A follow-up study using hair from 70 men found a similar result, with hard-water-treated hair about 8 percent weaker than both untreated hair and hair treated with deionised water.^[5]

Put side by side with Queensland's water, the picture becomes much clearer:

The study that reported its water hardness and found weaker hair used water roughly five times harder than Brisbane's and more than ten times harder than the Gold Coast's. The follow-up study used the hardest local water the researchers could find but did not report a figure. At about twice Brisbane's level, no effect was found at all.

There is a second limitation worth knowing. All three studies soaked cut or shed hair in a laboratory and then measured how much force it took to snap a strand. None of them looked at hair falling out from the scalp. At most, they speak to breakage along the length of the hair, which is a different problem from hair loss.

So what is that "different" feeling some people notice? The most likely explanation is lather. Harder water makes shampoo foam less easily, which can change how clean or coated hair feels, and people moving between soft and harder water often notice it.^[2] That is a real effect, but it is a question of how hair feels rather than evidence of damage.

Chlorine in your tap water

Drinking water in South East Queensland is disinfected with chlorine-based compounds, either chlorine or chloramine depending on the part of the network, to keep it free of harmful bacteria.^[1][2]

The levels are low. In Urban Utilities' 2023-24 report, 95 percent of total chlorine readings in the Brisbane and Ipswich system were at or below 3 mg/L, against a health guideline of 5 mg/L.^[1] Seqwater's Gold Coast reporting shows an average of about 1.7 mg/L over the 12 months to September 2026.^[2] In the shower, your hair is also only in contact with that water for a few minutes.

We could not find any published research showing that chlorine at drinking water levels causes hair loss or measurable hair damage. If your scalp feels tight or itchy, products, washing habits and scalp conditions are more common explanations, and they are worth looking at first.

Pools: where chlorine does matter

Swimming pools are a different matter, because the exposure is longer, more frequent and repeated week after week.

The clearest evidence comes from a study of 67 swimmers from the Japanese national team compared with 54 people of the same age who did not swim. Hair discolouration was found in 61 percent of the swimmers and none of the comparison group. Under the electron microscope, the swimmers' discoloured hair had completely lost its cuticle, the protective outer layer of the strand. Importantly, when the researchers tested the activity of the hair roots themselves, they found no difference between the two groups. The damage was to the hair shaft, not the follicle.^[6]

That fits what regular swimmers tend to notice: hair that is drier, rougher, lighter and harder to manage, rather than hair that falls out. Dermatologists from the American Academy of Dermatology recommend that swimmers wear a swim cap, rinse their hair immediately after swimming, then wash with a shampoo formulated for swimmers and follow with a deep conditioner.^[7]

Many swimmers also wet their hair with fresh water before getting in, on the reasoning that hair already holding fresh water takes up less pool water. It is a sensible habit that costs nothing, although we could not find a published study that has tested it.

The beach and the sun

The Gold Coast lifestyle adds two more factors to the mix.

On seawater, we could not find good quality research on its effects on hair. Rinsing with fresh water after a swim is a simple, low-cost habit, but any stronger claim about salt water and hair damage goes beyond what the evidence shows.

The sun is better understood. Dermatologists recommend protecting hair in the sun with a wide-brimmed hat or a leave-in conditioner containing zinc oxide.^[7] A hat has a second benefit for anyone whose hair is thinning: it shades the scalp itself.

Do you need a shower filter or a water softener?

Shower filters are heavily marketed for hair, so this question comes up often. We looked for peer-reviewed research on whether they improve hair condition or reduce hair loss and could not find any.

Products also differ widely in what they claim to remove. If you are considering one, check whether it claims to reduce chlorine, the calcium and magnesium that make water hard, or both, and look for independent test results backing that up, rather than relying on before-and-after photos or reviews.

Given how soft the Gold Coast supply is, and that Brisbane's water sits well below the hardness levels where any effect on hair has been measured, the case for softening your water for the sake of your hair is weak. For most people, that money is better spent on good basic hair care, and on getting real answers if hair loss is the concern.

If your hair is thinning, it is probably not the water

This is the most important point in the article. When people notice more hair in the shower drain, the water is an easy thing to blame because it is the last thing that touched their hair. But hairs that come out during washing are almost always hairs that had already reached the end of their natural growth cycle. Washing releases them. It does not cause them.

None of the research above links tap water to hair falling out from the root. Genuine thinning has other causes, from genetic pattern hair loss to stress-related shedding, iron deficiency and thyroid problems, and those need a different response from changing your shower setup. What causes hair loss?

If you are shedding more than usual or noticing thinning, a professional scalp assessment will tell you far more than a new filter.

A practical routine for Queensland conditions

These steps draw on recommendations from the American Academy of Dermatology:

• Shampoo your scalp, not the lengths. Massage shampoo into the scalp and let it rinse through the rest of your hair, rather than scrubbing the ends.^[7][8]
• Condition after every wash. Conditioner reduces friction and makes hair easier to detangle.^[7]
• Blot, do not rub. Wrap your hair in a towel to absorb water instead of rubbing it dry.^[7]
• Go easy on heat. Air dry when you can and use the lowest heat setting that works.^[7][8]
• If you swim regularly: wear a cap, rinse straight after, then use a swimmers' shampoo and a deep conditioner.^[7]
• In the sun: wear a wide-brimmed hat or use a leave-in conditioner containing zinc oxide.^[7]
• After the beach: rinse with fresh water.