Combat limescale, protect your appliances, and enjoy better-tasting water in hard water areas
London and the South East of England have some of the hardest water in the UK, with calcium carbonate levels often exceeding 300 mg/L (classified as "very hard"). This is because water passes through chalk and limestone aquifers before reaching your tap.
Thames Water
280-320 mg/L
Very Hard
Affinity Water
290-340 mg/L
Very Hard
Essex & Suffolk
300-350 mg/L
Extremely Hard
White deposits on kettles, taps, showerheads, and appliances. Reduces efficiency and lifespan of boilers and washing machines.
Dry skin, eczema flare-ups, dull hair. Hard water prevents soap from lathering properly and leaves residue on skin.
Chalky, metallic taste in drinking water and tea/coffee. Makes beverages less enjoyable.
Higher energy bills (limescale reduces heating efficiency), more detergent needed, frequent appliance repairs.
£449
Amazon UK
The Waterdrop G3 P800 is our top recommendation for London's hard water. Its 7-stage reverse osmosis filtration removes up to 99% of calcium and magnesium, completely eliminating hardness. The tankless design saves space and prevents bacterial growth.
£299
Amazon UK
The iSpring RCC7AK offers excellent hard water removal at a budget-friendly price. The 6-stage system includes an alkaline remineralization filter that adds back beneficial minerals after removing hardness.
£89
Amazon UK
The Waterdrop 10UA is a budget carbon filter that removes 93% of PFAS (TechGearLab verified), chlorine, and sediment. It's an excellent entry-level option for taste improvement. Note: Carbon filters don't reduce hardness - for hard water, consider an RO system or water softener.
⚠️ Important: Independent testing shows only 3.8% lead removal. Not suitable for lead concerns.
| Model | Price | Hardness Removal | Best For |
|---|---|---|---|
| Waterdrop G3 P800 | £449 | 99% | Complete solution |
| iSpring RCC7AK | £299 | 99% | Budget RO |
| Waterdrop 10UA | £59 | 0% (carbon filter) | Taste only |