Greater London · London

Is Croydon water hard or soft?

Hard at 297 ppm · 9 postcode districts

  • Supplier South East Water
  • County Greater London
  • Postcodes 9
Area average
297
ppm CaCO₃
Hard
Soft
Moderate
Hard
Very hard
0100200300400+

The average water hardness in Croydon is 297 ppm, classified as hard. Croydon is served by South East Water, covering 9 postcode districts across Greater London in the London region.

Hardness varies across the area — see the table below for a breakdown by postcode district.

By postcode

Water Hardness by Postcode in Croydon

Sorted by hardness — tap a postcode for full details.

Postcode Water Company Hardness PPM Level
CR9 South East Water
301
301 ppm Very Hard
CR8 South East Water
300
300 ppm Hard
CR7 South East Water
299
299 ppm Hard
CR6 South East Water
298
298 ppm Hard
CR5 South East Water
297
297 ppm Hard
CR4 South East Water
296
296 ppm Hard
CR3 South East Water
295
295 ppm Hard
CR2 South East Water
294
294 ppm Hard
CR0 South East Water
292
292 ppm Hard
Suppliers

Water Companies Serving Croydon

Tap for full coverage area and hardness data.

South East Water

297 ppm Hard

Water Hardness Guides

Learn more about water hardness and how to manage it.

What Is Water Hardness? Effects Solutions Water Softeners Limescale Removal
Recommended

Products for Croydon

Popular choices for households dealing with hard water.

Water2Buy W2B200 Water Softener

From ~£400

Best-value whole-house ion-exchange softener for UK homes. Eliminates limescale from pipes, boilers, and appliances. Digital metered regeneration — low salt use. 7-year warranty.

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Philips AWP1775 Shower Filter

From ~£30

Quick win for skin and hair in hard water areas. Reduces chlorine and limescale — fits standard shower hoses in minutes, no tools needed. Cartridge lasts ~6 months.

View on Amazon

BRITA Marella Water Filter Jug

From ~£20

UK's best-selling filter jug. Reduces limescale, chlorine, and metals for better-tasting tap water. Quick first step alongside a softener.

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