Greater London · London

Is Southall water hard or soft?

Hard at 287 ppm · 11 postcode districts

  • Supplier Thames Water
  • County Greater London
  • Postcodes 11
Area average
287
ppm CaCO₃
Hard
Soft
Moderate
Hard
Very hard
0100200300400+

The average water hardness in Southall is 287 ppm, classified as hard. Southall is served by Thames Water, covering 11 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 Southall

Sorted by hardness — tap a postcode for full details.

Postcode Water Company Hardness PPM Level
UB11 Thames Water
314
314 ppm Very Hard
UB10 Thames Water
313
313 ppm Very Hard
UB9 Thames Water
285
285 ppm Hard
UB8 Thames Water
284
284 ppm Hard
UB7 Thames Water
283
283 ppm Hard
UB6 Thames Water
282
282 ppm Hard
UB5 Thames Water
281
281 ppm Hard
UB4 Thames Water
280
280 ppm Hard
UB3 Thames Water
279
279 ppm Hard
UB2 Thames Water
278
278 ppm Hard
UB1 Thames Water
277
277 ppm Hard
Suppliers

Water Companies Serving Southall

Tap for full coverage area and hardness data.

Thames Water

302 ppm Very 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 Southall

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.

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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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