Best Tap Water Filters in the UK 2026
Tap water in the UK is safe to drink, but many households notice taste issues from chlorine, limescale, or sediment. Jug filters like BRITA and PUR are the most affordable way to improve water quality without expensive installations. These gravity-fed systems use activated carbon and ion-exchange cartridges to reduce chlorine, odours, and some impurities. UK water hardness varies by region—softer in Scotland and the South West, harder in London and the Midlands—so filter choice depends on your local supply. A single cartridge lasts 2-4 weeks for an average household and costs £2-4 to replace. This guide covers the best UK-available options for different needs: large families, small kitchens, budget shoppers, and those in hard-water areas.
What to Look For
- 1Check your water hardness and chlorine levels via your local water company report to prioritize filters that address your specific concerns
- 2Measure available fridge or worktop space—jug heights range from 20cm (compact) to 28cm (family-size, 3L+)
- 3Compare cartridge replacement costs and lifespan (typically £2–4 per cartridge, lasting 25–40L) rather than upfront price
- 4Look for certifications like NSF 53 (UK-recognised for carbon filters) to verify removal claims
- 5Replace cartridges on schedule; overused filters trap contaminants and leach carbon back into water
Our Top Picks
BRITA Marella XL
Pros
- Largest capacity in its price range—ideal for families or offices
- Cartridges readily available at Sainsbury's, Tesco, Boots
- Low-cost replacement cartridges (£3–4 for 3-pack)
- Proven chlorine and odour reduction
Cons
- Slower filtration speed than some competitors (2 minutes per litre)
- Not ideal for tight kitchen spaces due to height
- Doesn't reduce hardness (limescale still present)
Best overall jug filter for UK households—combines capacity, affordability, and availability.
PUR Advanced Water Pitcher
Pros
- Fastest filtration speed—water ready in under 2 minutes
- Largest cartridge lifespan (40L)—fewer replacements needed
- Reduces chlorine, taste, odour, and some heavy metals
- Simple one-handed pouring design
Cons
- Cartridges slightly pricier than BRITA (£4–5)
- Less shelf space availability in some UK supermarkets
- Still does not address permanent hardness
Best for impatient users who want fast filtration and longer cartridge life.
Aqua Optima Lisa Plus
Pros
- UK-owned brand with customer support based in Britain
- Compact footprint—suits small kitchens and tight spaces
- 6-stage filter removes more sediment than basic 2-stage systems
- Affordable cartridges (£2–3) sold in most UK retailers
Cons
- Smallest capacity (2.8L)—frequent refills for large families
- Less widespread availability than BRITA in major supermarkets
- Slightly less proven track record than BRITA globally
Best budget-friendly option for UK households with space constraints.
Editor's Note
UK tap water is highly regulated by Ofwat, so health risks are minimal—jug filters improve taste rather than safety. The real advantage is removing residual chlorine and improving water clarity. In hard-water areas (London, South East, Midlands), none of these filters eliminate limescale; they only reduce it partially. If you live in a very hard area, consider a water softener alongside a jug filter. Always store cartridges upright and replace on schedule—using a filter beyond its rated lifespan actually reduces water quality. Most households spend £8–16 per year on cartridge replacements, making jugs far cheaper than bottled water.