Is South East London a hard water area?
Yes. Tap water across the SE postcode area is very hard, the top band on the scale water companies use, with a median of 294 mg/L calcium carbonate. It ranges from 248 mg/L in SE26 to 355 mg/L in SE7, from 28 districts with their own water company reading.
- 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 SE district
Hardest first. Hard starts at 180 mg/L, very hard at 250.
| District | mg/L | Hardness |
|---|---|---|
| SE7 | 355 | very hard |
| SE12 | 355 | very hard |
| SE20 | 334 | very hard |
| SE16 | 333 | very hard |
| SE28 | 331 | very hard |
| SE6 | 331 | very hard |
| SE22 | 330 | very hard |
| SE21 | 318 | very hard |
| SE4 | 312 | very hard |
| SE24 | 311 | very hard |
| SE27 | 308 | very hard |
| SE23 | 304 | very hard |
| SE25 | 304 | very hard |
| SE2 | 295 | very hard |
| SE17 | 293 | very hard |
| SE19 | 292 | very hard |
| SE3 | 291 | very hard |
| SE5 | 290 | very hard |
| SE1 | 290 | very hard |
| SE10 | 282 | very hard |
| SE13 | 277 | very hard |
| SE14 | 269 | very hard |
| SE11 | 268 | very hard |
| SE8 | 260 | very hard |
| SE18 | 256 | very hard |
| SE9 | 254 | very hard |
| SE15 | 251 | very hard |
| SE26 | 248 | hard |
Softener quotes for South East London
At 294 mg/L most SE homes get their money back on a softener within a few years. Free quotes from installers covering your postcode, no obligation.
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Check your exact postcode
The area figure is a median. Your district can sit anywhere between 248 and 355 mg/L.
Nearby areas
- Is South East London a hard water area?
- Yes. The median hardness across SE postcode districts is 294 mg/L calcium carbonate, which is very hard. 100% of the 28 districts we hold readings for are hard or very hard (180 mg/L and above).
- What is the water hardness in South East London?
- Between 248 and 355 mg/L depending on the district, with a median of 294. The hardest measured district is SE7 at 355 mg/L and the softest is SE26 at 248. Figures come from water company drinking-water tests.
- Do I need a water softener in South East London?
- In most SE homes a softener pays for itself: at 294 mg/L kettles, boilers and showers scale up quickly. Check your own district first, because hardness varies from 248 to 355 within the area.
Hardness as mg/L calcium carbonate from water company drinking-water tests and postcode checkers. See the UK hardness map for every area.