Tap water hardness in Rotherham
We have published hardness data for 9 cities in Rotherham. The median is 242 mg/L; the hardest water is in Maltby (300 mg/L), the softest in Treeton (116 mg/L).
89 % 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 Rotherham, hardest first
| mg/L | mg/L | ||
|---|---|---|---|
| Maltby | 300 | 300 | very hard |
| Swinton | 267 | 267 | very hard |
| Rawmarsh | 257 | 257 | very hard |
| Whiston | 257 | 257 | very hard |
| Hellaby | 242 | 242 | very hard |
| Rotherham | 210 | 210 | very hard |
| Dinnington | 187 | 187 | very hard |
| Kiveton Park | 185 | 185 | very hard |
| Treeton | 116 | 116 | moderately hard |