Tap water hardness in Leeds
We have published hardness data for 13 cities in Leeds. The median is 134 mg/L; the hardest water is in Swillington (275 mg/L), the softest in Otley (54 mg/L).
54 % of these cities have hard or very hard water (over 120 mg/L).
UK suppliers report mg/L CaCO₃ and often Clark degrees (1 °Clark = 14.25 mg/L).
Cities in Leeds, hardest first
| mg/L | mg/L | ||
|---|---|---|---|
| Swillington | 275 | 275 | very hard |
| Garforth | 273 | 273 | very hard |
| Kippax | 261 | 261 | very hard |
| East Keswick | 147 | 147 | hard |
| Wetherby | 144 | 144 | hard |
| Leeds | 136 | 136 | hard |
| Bramhope | 134 | 134 | hard |
| Gildersome | 93 | 93 | moderately hard |
| Pudsey | 91 | 91 | moderately hard |
| Morley | 86 | 86 | moderately hard |
| Guiseley | 57 | 57 | soft |
| Yeadon | 54 | 54 | soft |
| Otley | 54 | 54 | soft |