Hertfordshire · South East

Is Hemel Hempstead water hard or soft?

Hard at 288 ppm · 24 postcode districts

  • Supplier Thames Water
  • County Hertfordshire
  • Postcodes 24
Area average
288
ppm CaCO₃
Hard
Soft
Moderate
Hard
Very hard
0100200300400+

The average water hardness in Hemel Hempstead is 288 ppm, classified as hard. Hemel Hempstead is served by Thames Water, covering 24 postcode districts across Hertfordshire 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 Hemel Hempstead

Sorted by hardness — tap a postcode for full details.

Postcode Water Company Hardness PPM Level
HP9 Thames Water
326
326 ppm Very Hard
HP8 Thames Water
325
325 ppm Very Hard
HP7 Thames Water
324
324 ppm Very Hard
HP6 Thames Water
323
323 ppm Very Hard
HP5 Thames Water
322
322 ppm Very Hard
HP4 Thames Water
321
321 ppm Very Hard
HP3 Thames Water
320
320 ppm Very Hard
HP2 Thames Water
319
319 ppm Very Hard
HP1 Thames Water
318
318 ppm Very Hard
HP27 Thames Water
292
292 ppm Hard
HP23 Thames Water
288
288 ppm Hard
HP22 Thames Water
287
287 ppm Hard
HP21 Thames Water
286
286 ppm Hard
HP20 Thames Water
285
285 ppm Hard
HP19 Thames Water
261
261 ppm Hard
HP18 Thames Water
260
260 ppm Hard
HP17 Thames Water
259
259 ppm Hard
HP16 Thames Water
258
258 ppm Hard
HP15 Thames Water
257
257 ppm Hard
HP14 Thames Water
256
256 ppm Hard
HP13 Thames Water
255
255 ppm Hard
HP12 Thames Water
254
254 ppm Hard
HP11 Thames Water
253
253 ppm Hard
HP10 Thames Water
252
252 ppm Hard
Suppliers

Water Companies Serving Hemel Hempstead

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 Hemel Hempstead

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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