Derbyshire · East Midlands

Is Derby water hard or soft?

Hard at 199 ppm · 23 postcode districts

  • Supplier Severn Trent Water
  • County Derbyshire
  • Postcodes 23
Area average
199
ppm CaCO₃
Hard
Soft
Moderate
Hard
Very hard
0100200300400+

The average water hardness in Derby is 199 ppm, classified as hard. Derby is served by Severn Trent Water, covering 23 postcode districts across Derbyshire in the East Midlands region.

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

By postcode

Water Hardness by Postcode in Derby

Sorted by hardness — tap a postcode for full details.

Postcode Water Company Hardness PPM Level
DE45 Severn Trent Water
283
283 ppm Hard
DE75 Severn Trent Water
231
231 ppm Hard
DE74 Severn Trent Water
230
230 ppm Hard
DE73 Severn Trent Water
229
229 ppm Hard
DE72 Severn Trent Water
228
228 ppm Hard
DE24 Severn Trent Water
216
216 ppm Hard
DE23 Severn Trent Water
215
215 ppm Hard
DE22 Severn Trent Water
214
214 ppm Hard
DE21 Severn Trent Water
213
213 ppm Hard
DE65 Severn Trent Water
198
198 ppm Hard
DE15 Severn Trent Water
184
184 ppm Hard
DE14 Severn Trent Water
183
183 ppm Hard
DE7 Severn Trent Water
183
183 ppm Hard
DE13 Severn Trent Water
182
182 ppm Hard
DE6 Severn Trent Water
182
182 ppm Hard
DE12 Severn Trent Water
181
181 ppm Hard
DE5 Severn Trent Water
181
181 ppm Hard
DE11 Severn Trent Water
180
180 ppm Moderately Hard
DE4 Severn Trent Water
180
180 ppm Moderately Hard
DE3 Severn Trent Water
179
179 ppm Moderately Hard
DE1 Severn Trent Water
177
177 ppm Moderately Hard
DE56 Severn Trent Water
166
166 ppm Moderately Hard
DE55 Severn Trent Water
165
165 ppm Moderately Hard
Suppliers

Water Companies Serving Derby

Tap for full coverage area and hardness data.

Severn Trent Water

222 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 Derby

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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