WaterWater Hardness in Hampshire
South East • 57 postcode districts • 2 towns
Water Hardness Across Hampshire
The average water hardness in Hampshire is 244 ppm, classified as hard. Across 57 postcode districts in the South East region, hardness ranges from 163 ppm to 287 ppm.
Hampshire is served by Portsmouth Water and Severn Trent Water. With hard water, residents may benefit from a <a href="/water-softener-guide/">water softener</a> to reduce limescale and protect appliances.
Towns in Hampshire
| Town | Avg Hardness | PPM | Level |
|---|---|---|---|
| Portsmouth | 261 ppm | Hard | |
| Southampton | 219 ppm | Hard |
Water Companies in Hampshire
All Postcodes in Hampshire
| Postcode | Town | Hardness | PPM | Level |
|---|---|---|---|---|
| PO22 | Bognor Regis | 287 ppm | Hard | |
| PO21 | Bognor Regis | 286 ppm | Hard | |
| SO45 | Southampton | 286 ppm | Hard | |
| PO20 | Chichester | 285 ppm | Hard | |
| SO43 | Lyndhurst | 284 ppm | Hard | |
| PO9 | Havant | 283 ppm | Hard | |
| SO42 | Brockenhurst | 283 ppm | Hard | |
| PO8 | Waterlooville | 282 ppm | Hard | |
| SO41 | Lymington | 282 ppm | Hard | |
| PO7 | Waterlooville | 281 ppm | Hard | |
| SO40 | Southampton | 281 ppm | Hard | |
| PO6 | Portsmouth | 280 ppm | Hard | |
| PO5 | Southsea | 279 ppm | Hard | |
| PO4 | Southsea | 278 ppm | Hard | |
| PO3 | Portsmouth | 277 ppm | Hard | |
| PO2 | Portsmouth | 276 ppm | Hard | |
| PO1 | Portsmouth | 275 ppm | Hard | |
| PO41 | Yarmouth | 271 ppm | Hard | |
| PO40 | Freshwater | 270 ppm | Hard | |
| PO19 | Chichester | 261 ppm | Hard | |
| PO18 | Chichester | 260 ppm | Hard | |
| PO17 | Fareham | 259 ppm | Hard | |
| PO16 | Fareham | 258 ppm | Hard | |
| PO15 | Fareham | 257 ppm | Hard | |
| PO14 | Fareham | 256 ppm | Hard | |
| PO13 | Gosport | 255 ppm | Hard | |
| PO12 | Gosport | 254 ppm | Hard | |
| PO11 | Hayling Island | 253 ppm | Hard | |
| PO10 | Emsworth | 252 ppm | Hard | |
| SO32 | Southampton | 250 ppm | Hard | |
| SO31 | Southampton | 249 ppm | Hard | |
| SO30 | Southampton | 248 ppm | Hard | |
| PO39 | Totland Bay | 246 ppm | Hard | |
| PO38 | Ventnor | 245 ppm | Hard | |
| PO37 | Shanklin | 244 ppm | Hard | |
| PO36 | Sandown | 243 ppm | Hard | |
| PO35 | Bembridge | 242 ppm | Hard | |
| PO34 | Seaview | 241 ppm | Hard | |
| PO33 | Ryde | 240 ppm | Hard | |
| PO32 | East Cowes | 239 ppm | Hard | |
| PO31 | Cowes | 238 ppm | Hard | |
| PO30 | Newport | 237 ppm | Hard | |
| SO24 | Alresford | 219 ppm | Hard | |
| SO23 | Winchester | 218 ppm | Hard | |
| SO22 | Winchester | 217 ppm | Hard | |
| SO21 | Winchester | 216 ppm | Hard | |
| SO20 | Stockbridge | 215 ppm | Hard | |
| SO19 | Southampton | 191 ppm | Hard | |
| SO18 | Southampton | 190 ppm | Hard | |
| SO17 | Southampton | 189 ppm | Hard | |
| SO16 | Southampton | 188 ppm | Hard | |
| SO15 | Southampton | 187 ppm | Hard | |
| SO14 | Southampton | 186 ppm | Hard | |
| SO53 | Eastleigh | 166 ppm | Moderately Hard | |
| SO52 | Southampton | 165 ppm | Moderately Hard | |
| SO51 | Romsey | 164 ppm | Moderately Hard | |
| SO50 | Eastleigh | 163 ppm | Moderately Hard |
Recommended Products for Hampshire
Top picks for households in hard water areas across Hampshire.
Water2Buy W2B200 Water Softener
From ~£400Best-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 AmazonPhilips AWP1775 Shower Filter
From ~£30Instant improvement for skin and hair. Reduces chlorine and limescale at the showerhead — no plumbing needed. A good first step before committing to a full softener.
View on AmazonHard Water Guides
Learn more about water hardness and how to manage it.
All counties in South East • Hardest water areas • Softest water areas • Hard water solutions
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