WaterIs Oxford Water Hard or Soft?
Very Hard at 304 ppm • Oxfordshire, South East
The average water hardness in Oxford is 304 ppm, classified as very hard. Oxford is served by Thames Water, covering 26 postcode districts across Oxfordshire in the South East region.
Hardness varies across the area — see the table below for a breakdown by postcode district.
Water Hardness by Postcode in Oxford
| Postcode | Water Company | Hardness | PPM | Level |
|---|---|---|---|---|
| OX13 | Thames Water | 350 ppm | Very Hard | |
| OX12 | Thames Water | 349 ppm | Very Hard | |
| OX44 | Thames Water | 349 ppm | Very Hard | |
| OX11 | Thames Water | 348 ppm | Very Hard | |
| OX10 | Thames Water | 347 ppm | Very Hard | |
| OX9 | Thames Water | 335 ppm | Very Hard | |
| OX7 | Thames Water | 333 ppm | Very Hard | |
| OX5 | Thames Water | 331 ppm | Very Hard | |
| OX4 | Thames Water | 330 ppm | Very Hard | |
| OX3 | Thames Water | 329 ppm | Very Hard | |
| OX2 | Thames Water | 328 ppm | Very Hard | |
| OX1 | Thames Water | 327 ppm | Very Hard | |
| OX39 | Thames Water | 321 ppm | Very Hard | |
| OX33 | Thames Water | 315 ppm | Very Hard | |
| OX29 | Thames Water | 288 ppm | Hard | |
| OX28 | Thames Water | 287 ppm | Hard | |
| OX27 | Thames Water | 286 ppm | Hard | |
| OX26 | Thames Water | 285 ppm | Hard | |
| OX25 | Thames Water | 284 ppm | Hard | |
| OX20 | Thames Water | 279 ppm | Hard | |
| OX18 | Thames Water | 254 ppm | Hard | |
| OX17 | Thames Water | 253 ppm | Hard | |
| OX49 | Thames Water | 253 ppm | Hard | |
| OX16 | Thames Water | 252 ppm | Hard | |
| OX15 | Thames Water | 251 ppm | Hard | |
| OX14 | Thames Water | 250 ppm | Hard |
Water Companies Serving Oxford
Water Hardness Guides
Recommended Products for Oxford
Popular choices for households dealing with very hard water in this area.
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 ~£30Quick 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 AmazonBRITA Marella Water Filter Jug
From ~£20UK's best-selling filter jug. Reduces limescale, chlorine, and metals for better-tasting tap water. Quick first step alongside a softener.
View on AmazonGet Water Hardness Updates
Be notified when your water company reports changes to hardness levels.