150mg of limescale minerals in every litre, the median across TN districts
Is Tonbridge a hard water area?
No. Tap water across the TN postcode area is moderately hard, with some scale over time but rarely enough to need a softener, with a median of 150 mg/L calcium carbonate. It ranges from 97 mg/L in TN3 to 330 mg/L in TN16, from 9 districts with their own water company reading and 31 estimated from the area.
- Soft
- 0 to 60 mg/L
- Moderately soft
- 60 to 120 mg/L
- Slightly hard
- 120 to 180 mg/L
- Hard
- 180 to 200 mg/L
- Very hard
- 200 to 400 mg/L
Hardness by TN district
Hardest first. Hard starts at 180 mg/L, very hard at 250. Districts marked with an asterisk take the area's median rather than a reading of their own.
| District | Area | mg/L | Hardness |
|---|---|---|---|
| TN16 | Sevenoaks | 330 | very hard |
| TN14 | Sevenoaks | 301 | very hard |
| TN13 | Sevenoaks | 266 | very hard |
| TN17 | Tunbridge Wells | 163 | moderately hard |
| TN4 | Tunbridge Wells | 150 | moderately hard |
| TN7* | Wealden | 150 | moderately hard |
| TN8* | Sevenoaks | 150 | moderately hard |
| TN10* | Tonbridge and Malling | 150 | moderately hard |
| TN11* | Tonbridge and Malling | 150 | moderately hard |
| TN12* | Maidstone | 150 | moderately hard |
| TN23* | Ashford | 150 | moderately hard |
| TN15* | Tonbridge and Malling | 150 | moderately hard |
| TN38* | Hastings | 150 | moderately hard |
| TN34* | Hastings | 150 | moderately hard |
| TN19* | Rother | 150 | moderately hard |
| TN20* | Wealden | 150 | moderately hard |
| TN22* | Wealden | 150 | moderately hard |
| TN24* | Ashford | 150 | moderately hard |
| TN25* | Ashford | 150 | moderately hard |
| TN26* | Ashford | 150 | moderately hard |
| TN27* | Ashford | 150 | moderately hard |
| TN29* | Folkestone and Hythe | 150 | moderately hard |
| TN30* | Ashford | 150 | moderately hard |
| TN31* | Rother | 150 | moderately hard |
| TN32* | Rother | 150 | moderately hard |
| TN33* | Rother | 150 | moderately hard |
| TN37* | Hastings | 150 | moderately hard |
| TN39* | Rother | 150 | moderately hard |
| TN5* | Rother | 150 | moderately hard |
| TN9* | Tonbridge and Malling | 150 | moderately hard |
| TN35* | Hastings | 150 | moderately hard |
| TN36* | Rother | 150 | moderately hard |
| TN40* | Rother | 150 | moderately hard |
| TN21* | Wealden | 150 | moderately hard |
| TN6* | Wealden | 150 | moderately hard |
| TN28* | Folkestone and Hythe | 150 | moderately hard |
| TN18 | Tunbridge Wells | 129 | moderately hard |
| TN1 | Tunbridge Wells | 97 | moderately soft |
| TN2 | Tunbridge Wells | 97 | moderately soft |
| TN3 | Tunbridge Wells | 97 | moderately soft |
You do not need a softener in Tonbridge.
At 150 mg/L the practical effects are minor. If you notice anything, it is usually chlorine rather than hardness: a shower filter or a filter jug deals with that.
Check your exact postcode
The area figure is a median. Your district can sit anywhere between 97 and 330 mg/L.
Questions about Tonbridge water
Is Tonbridge a hard water area?
No. The median hardness across TN postcode districts is 150 mg/L calcium carbonate, which is moderately hard. 8% of the 40 districts we hold readings for are hard or very hard (180 mg/L and above).
What is the water hardness in Tonbridge?
Between 97 and 330 mg/L depending on the district, with a median of 150. The hardest measured district is TN16 at 330 mg/L and the softest is TN3 at 97. Figures come from water company drinking-water tests, with postcode-area estimates for districts that have no reading of their own.
Do I need a water softener in Tonbridge?
Usually not. At a median of 150 mg/L limescale is a minor issue in Tonbridge. A filter jug or a shower filter covers the everyday effects. Only districts at 180 mg/L or above are worth a softener quote.
Hardness as mg/L calcium carbonate from water company drinking-water tests and postcode checkers. See the UK hardness map for every area.