Is Redhill a hard water area?
No. Tap water across the RH postcode area is moderately hard, with some scale over time but rarely enough to need a softener, with a median of 148 mg/L calcium carbonate. It ranges from 75 mg/L in RH5 to 287 mg/L in RH8, from 12 districts with their own water company reading and 8 estimated from the area.
- Soft
- Moderately soft
- Slightly hard
- Very hard
- 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 RH 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 | mg/L | Hardness |
|---|---|---|
| RH8 | 287 | very hard |
| RH7 | 225 | hard |
| RH10 | 204 | hard |
| RH2 | 204 | hard |
| RH3 | 154 | moderately hard |
| RH12 | 154 | moderately hard |
| RH18* | 148 | moderately hard |
| RH17* | 148 | moderately hard |
| RH20* | 148 | moderately hard |
| RH19* | 148 | moderately hard |
| RH13* | 148 | moderately hard |
| RH15* | 148 | moderately hard |
| RH16* | 148 | moderately hard |
| RH11* | 148 | moderately hard |
| RH9 | 141 | moderately hard |
| RH1 | 141 | moderately hard |
| RH4 | 138 | moderately hard |
| RH14 | 138 | moderately hard |
| RH6 | 88 | moderately soft |
| RH5 | 75 | moderately soft |
You do not need a softener in Redhill.
At 148 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 75 and 287 mg/L.
Nearby areas
- Is Redhill a hard water area?
- No. The median hardness across RH postcode districts is 148 mg/L calcium carbonate, which is moderately hard. 20% of the 20 districts we hold readings for are hard or very hard (180 mg/L and above).
- What is the water hardness in Redhill?
- Between 75 and 287 mg/L depending on the district, with a median of 148. The hardest measured district is RH8 at 287 mg/L and the softest is RH5 at 75. 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 Redhill?
- Usually not. At a median of 148 mg/L limescale is a minor issue in Redhill. 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.