Greater London · London

Is Romford water hard or soft?

Very Hard at 318 ppm · 20 postcode districts

  • Supplier Thames Water
  • County Greater London
  • Postcodes 20
Area average
318
ppm CaCO₃
Very Hard
Soft
Moderate
Hard
Very hard
0100200300400+

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The average water hardness in Romford is 318 ppm, classified as very hard. Romford is served by Thames Water, covering 20 postcode districts across Greater London in the London region.

Hardness varies across the area — see the table below for a breakdown by postcode district. RM19 has the hardest water at 339 ppm, while RM20 is the softest at 262 ppm.

By postcode

Water Hardness by Postcode in Romford

Sorted by hardness — tap a postcode for full details.

Postcode Water Company Hardness PPM Level
RM19 Thames Water
339
339 ppm Very Hard
RM18 Thames Water
338
338 ppm Very Hard
RM17 Thames Water
337
337 ppm Very Hard
RM16 Thames Water
336
336 ppm Very Hard
RM15 Thames Water
335
335 ppm Very Hard
RM14 Thames Water
334
334 ppm Very Hard
RM13 Thames Water
333
333 ppm Very Hard
RM12 Thames Water
332
332 ppm Very Hard
RM11 Thames Water
331
331 ppm Very Hard
RM10 Thames Water
330
330 ppm Very Hard
RM9 Thames Water
310
310 ppm Very Hard
RM8 Thames Water
309
309 ppm Very Hard
RM7 Thames Water
308
308 ppm Very Hard
RM6 Thames Water
307
307 ppm Very Hard
RM5 Thames Water
306
306 ppm Very Hard
RM4 Thames Water
305
305 ppm Very Hard
RM3 Thames Water
304
304 ppm Very Hard
RM2 Thames Water
303
303 ppm Very Hard
RM1 Thames Water
302
302 ppm Very Hard
RM20 Thames Water
262
262 ppm Hard
Suppliers

Water Companies Serving Romford

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 Romford

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 Romford water

Is Romford water hard or soft?
Romford is classified as very hard, averaging 318 ppm across 20 postcode districts. Expect visible limescale on kettles and taps within weeks at this level.
Which postcode in Romford has the hardest water?
RM19 has the hardest water in Romford at 339 ppm, while RM20 is the softest at 262 ppm. See the full table above for every district.
Which water company supplies Romford?
Romford is supplied by Thames Water, covering 20 postcode districts across Greater London.
Is tap water in Romford safe to drink?
Yes. All tap water in Romford meets UK drinking water standards. Hardness affects taste and limescale buildup but not safety.
Do I need a water softener in Romford?
At 318 ppm, many households in Romford 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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