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Hard Water & Skin: Check Your PPM by Postcode

Barrier Restoring Creamy Cleanser on a bathroom sink in a hard water area

If your skin changed after moving, it might be your water — not your skin

If you've moved house recently — or moved to London — and your skin hasn't felt the same since, you're not imagining it, and you're definitely not alone. Tighter after cleansing. Rougher. A bit more congested, no matter what you try. We hear this story all the time — and honestly? It might not be your skin at all. It might be your water.
Hard water is water with a high level of dissolved minerals — mainly calcium and magnesium. In many parts of the UK, especially London and the South East, that mineral-heavy water leaves residue on the skin, and over time your face can feel dry, rough, or congested because of it.

Why hard water makes skin feel dry, rough, or breakout-prone

Here's what's actually happening. When mineral-rich water dries on your skin, it leaves a fine residue behind. If your skin is already stressed, reactive, or city-exposed, that extra "film" is often the difference between comfortable and not-quite-right.
It's also why reaching for a harsh, foaming cleanser tends to backfire — you end up in a cycle of cleanse, tightness, then overcompensating with heavier products. Sound familiar?

How to check your water hardness (PPM) by postcode

The quickest way to know for sure is your water supplier's water quality checker. It takes about a minute:
  1. Search Google for "water quality checker" + your supplier's name (for example: "Thames Water water quality checker")
  2. Enter your postcode
  3. Look for Hardness, listed as mg/L as CaCO₃ — effectively the same measure people mean when they say PPM
New to the term? PPM stands for "parts per million" — how many mineral particles are dissolved in each million parts of water. The higher the number, the harder your water.

Top 10 Places in the U.K with the hardest water:

And if you're in London or the South East, the odds aren't exactly in your favour — based on 42,000+ property visits, these are the hardest-water areas in the UK:

Found your number? If it's 150 or above, look at your cleanser first

Don't panic — but do start with the step where hard water hits your skin every single day. It's the easiest thing to change, and it makes the biggest difference.
Most cleansers are built around foam and that "squeaky clean" feeling — which feels like it's working, but on hard-water-stressed skin it usually means stripped. We made Barrier Restoring Creamy Cleanser to do the opposite: a cream-to-milk formula that lifts daily impurities and the feel of mineral residue without harsh surfactants, so your skin feels clean, cushioned and comfortable. It's enriched with hard-water mineral-clearing Neem, skin de-stressing Ashwagandha, sulfur-rich Sea Moss and barrier-supporting Rice Bran Oil — skin looks clearer and feels softer after every cleanse.

How to use it — the dry cleanse method

In hard water areas, this one small change matters: cleanse on dry skin first. It lets the formula grip onto sunscreen, light makeup, excess oil and daily grime before more water hits your skin.
  1. Dispense 5–6 pumps into your hand
  2. Massage onto dry skin in circular motions for at least 30 seconds
  3. Add a little water to emulsify (it turns milky), then massage again for 15–30 seconds
  4. Rinse with lukewarm water, or remove with a warm, damp cloth
When skin feels extra rough: once emulsified, leave it on for up to 3 minutes, then rinse. For the full method and why it works, read Dry Cleansing: What It Is, Why It Works, and How to Do It Without Stripping Your Skin.
texture of barrier restoring chelating cleanser on face

Who it's for

This one's for you if you live in a hard water area and want a cleanse that actually feels comfortable; if you know that tight, squeaky feeling after washing and want a non-stripping cleanser instead; or if your skin is stressed, reactive, or city-exposed and needs a gentler daily step.
Ready to try it? Shop Barrier Restoring Creamy Cleanser — and if your number came back high, the complete hard water routine is the full fix.
Want the full picture? Read why hard water makes skin bumpy and how to fix it, then build the skincare routine for hard water areas. And if your area made the hardest-water list — tell us in the comments & what issues you've been dealing with.
Man holding Barrier Restoring Chelating Cleanser in bathroom happy with clear skin

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Frequently asked questions

  • What does PPM mean in water?

    PPM stands for "parts per million" — the number of mineral particles dissolved in each million parts of water. On UK water reports it's shown as mg/L as CaCO₃, which is the same measure. The higher the number, the harder your water.

  • What PPM is considered hard water?

    On the UK scale: 0–100 is soft, 100–150 slightly hard, 150–200 moderately hard, 200–300 hard, and 300+ very hard. Skin tends to feel the difference from around 150 upwards — that's the tight-after-washing feeling.

  • Can hard water cause breakouts?

    Not directly — acne is driven by hormones and oil production. But hard water's mineral residue can congest pores and stress the skin barrier, which makes breakouts look and feel worse. We answer this fully here: Does hard water cause acne? The bumpy-skin guide.

  • My water is hard — what should I do first?

    Change your cleanser before anything else — it's the step where hard water touches your skin every day. A barrier-first cream cleanser used with the dry cleanse method is the single biggest upgrade; the complete hard water routine is the full fix.

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