WaterIs Dartford Water Hard or Soft?
Hard at 289 ppm • Greater London, London
The average water hardness in Dartford is 289 ppm, classified as hard. Dartford is served by Thames Water, covering 18 postcode districts across Greater London in the London region.
Hardness varies across the area — see the table below for a breakdown by postcode district.
Water Hardness by Postcode in Dartford
| Postcode | Water Company | Hardness | PPM | Level |
|---|---|---|---|---|
| DA9 | Thames Water | 323 ppm | Very Hard | |
| DA8 | Thames Water | 322 ppm | Very Hard | |
| DA7 | Thames Water | 321 ppm | Very Hard | |
| DA6 | Thames Water | 320 ppm | Very Hard | |
| DA5 | Thames Water | 319 ppm | Very Hard | |
| DA4 | Thames Water | 318 ppm | Very Hard | |
| DA3 | Thames Water | 317 ppm | Very Hard | |
| DA2 | Thames Water | 316 ppm | Very Hard | |
| DA1 | Thames Water | 315 ppm | Very Hard | |
| DA18 | Thames Water | 262 ppm | Hard | |
| DA17 | Thames Water | 261 ppm | Hard | |
| DA16 | Thames Water | 260 ppm | Hard | |
| DA15 | Thames Water | 259 ppm | Hard | |
| DA14 | Thames Water | 258 ppm | Hard | |
| DA13 | Thames Water | 257 ppm | Hard | |
| DA12 | Thames Water | 256 ppm | Hard | |
| DA11 | Thames Water | 255 ppm | Hard | |
| DA10 | Thames Water | 254 ppm | Hard |
Water Companies Serving Dartford
Water Hardness Guides
Recommended Products for Dartford
Popular choices for households dealing with 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.