Surrey · South East

Is Redhill water hard or soft?

Very Hard at 321 ppm · 20 postcode districts

  • Supplier Southern Water
  • County Surrey
  • Postcodes 20
Area average
321
ppm CaCO₃
Very Hard
Soft
Moderate
Hard
Very hard
0100200300400+

The average water hardness in Redhill is 321 ppm, classified as very hard. Redhill is served by Southern Water, covering 20 postcode districts across Surrey in the South East region.

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

By postcode

Water Hardness by Postcode in Redhill

Sorted by hardness — tap a postcode for full details.

Postcode Water Company Hardness PPM Level
RH20 Southern Water
344
344 ppm Very Hard
RH9 Southern Water
329
329 ppm Very Hard
RH8 Southern Water
328
328 ppm Very Hard
RH7 Southern Water
327
327 ppm Very Hard
RH6 Southern Water
326
326 ppm Very Hard
RH5 Southern Water
325
325 ppm Very Hard
RH4 Southern Water
324
324 ppm Very Hard
RH3 Southern Water
323
323 ppm Very Hard
RH2 Southern Water
322
322 ppm Very Hard
RH1 Southern Water
321
321 ppm Very Hard
RH19 Southern Water
320
320 ppm Very Hard
RH18 Southern Water
319
319 ppm Very Hard
RH17 Southern Water
318
318 ppm Very Hard
RH16 Southern Water
317
317 ppm Very Hard
RH15 Southern Water
316
316 ppm Very Hard
RH14 Southern Water
315
315 ppm Very Hard
RH13 Southern Water
314
314 ppm Very Hard
RH12 Southern Water
313
313 ppm Very Hard
RH11 Southern Water
312
312 ppm Very Hard
RH10 Southern Water
311
311 ppm Very Hard
Suppliers

Water Companies Serving Redhill

Tap for full coverage area and hardness data.

Southern Water

263 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 Redhill

Popular choices for households dealing with very 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.

View on Amazon

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.

View on Amazon

Get Redhill Water Updates

Be notified when water companies in Redhill report changes to hardness levels.