Snap your test strip. We read it. You get your hair truth. ✨
Upload a photo of your water test strip next to the color chart. We'll read your water hardness, chlorine, and pH, then translate it into what it may mean for your hair. ✨
The science
Three things in your wash water shape how your hair behaves — and each works differently. This is what your HAO Water Kit™ measures, and why.
Minerals · measured as Hardness
Hard water carries dissolved calcium and magnesium. When they meet shampoo, they form a film that clings to hair and scalp — a bit like a thin layer of wax. Over time that film blocks water and conditioner from getting into the hair, so hair feels dry, heavy, and dull, loses its shine, and scalps can feel itchy or flaky.
pH · measured as Water balance
Healthy hair and scalp sit slightly acidic, around pH 4.5–5.5. When wash water is more alkaline than that, the hair's outer protective layer — the cuticle — lifts. Lifted cuticles catch on each other, so hair tangles more, loses moisture and protein faster, splits and breaks more easily, and lets color wash out sooner.
Chlorine · measured as Free chlorine
Tap water is disinfected with chlorine, and the residue that reaches your shower is an oxidizer. It strips the natural oils your scalp produces to protect hair and can weaken the hair's protein structure — hair feels straw-dry, colored hair fades faster, and sensitive scalps may feel tight or itchy.
✨ Why we measure all three
When all three run high at once, they compound: an opened cuticle lets minerals lodge deeper, while stripped oils leave nothing protecting the surface. That is why the same hair can behave so differently from one city to the next — and why we measure all three together, not just one.
The usual counters, if your readings run high: a chelating shampoo for minerals 🧴, a shower filter with a chlorine cartridge 🚿, and moisture or bond-repair care afterward 💆. Your Water Report™ matches these to your actual readings. Cosmetic hair-care effects only — not a water-safety assessment.
