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

Each water company publishes its own hardness data, so you can cross-check the Wembley figures here against the published hardness data from Thames Water Utilities Ltd.

Water Hardness Guides

Learn more about water hardness and how to manage it.

What Is Water Hardness? Effects Solutions Water Softeners Limescale Removal

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Products for Wembley

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Splendid Twin Tank Water Softener

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

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

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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