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

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Products for Hemel Hempstead

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