Greater London · London

Is Wembley water hard or soft?

Very Hard at 332 ppm · 10 postcode districts

  • Supplier Thames Water
  • County Greater London
  • Postcodes 10
Area average
332
ppm CaCO₃
Very Hard
Soft
Moderate
Hard
Very hard
0100200300400+

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The average water hardness in Wembley is 332 ppm, classified as very hard. Wembley is served by Thames Water, covering 10 postcode districts across Greater London in the London region.

Hardness varies across the area — see the table below for a breakdown by postcode district. HA9 has the hardest water at 336 ppm, while HA0 is the softest at 327 ppm.

By postcode

Water Hardness by Postcode in Wembley

Sorted by hardness — tap a postcode for full details.

Postcode Water Company Hardness PPM Level
HA9 Thames Water
336
336 ppm Very Hard
HA8 Thames Water
335
335 ppm Very Hard
HA7 Thames Water
334
334 ppm Very Hard
HA6 Thames Water
333
333 ppm Very Hard
HA5 Thames Water
332
332 ppm Very Hard
HA4 Thames Water
331
331 ppm Very Hard
HA3 Thames Water
330
330 ppm Very Hard
HA2 Thames Water
329
329 ppm Very Hard
HA1 Thames Water
328
328 ppm Very Hard
HA0 Thames Water
327
327 ppm Very Hard
Suppliers

Water Companies Serving Wembley

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 Wembley

Popular choices for households dealing with very hard water.

Splendid Twin Tank Water Softener

From ~£400

Twin-tank electric softener sized for 1 to 7 bedroom homes. Removes limescale from pipes, boilers, and appliances and delivers continuous soft water, with metered regeneration to keep salt use low.

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Philips 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 around 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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FAQ

Common questions about Wembley water

Is Wembley water hard or soft?
Wembley is classified as very hard, averaging 332 ppm across 10 postcode districts. Expect visible limescale on kettles and taps within weeks at this level.
Which postcode in Wembley has the hardest water?
HA9 has the hardest water in Wembley at 336 ppm, while HA0 is the softest at 327 ppm. See the full table above for every district.
Which water company supplies Wembley?
Wembley is supplied by Thames Water, covering 10 postcode districts across Greater London.
Is tap water in Wembley safe to drink?
Yes. All tap water in Wembley meets UK drinking water standards. Hardness affects taste and limescale buildup but not safety.
Do I need a water softener in Wembley?
At 332 ppm, many households in Wembley notice limescale in kettles and showerheads within weeks. A shower filter is the cheapest first step; a whole-house softener gives the most complete protection.
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