Filter Your Water (It Matters)
UK tap water is safe. That's never been in question — our water treatment standards are among the strictest in the world. But "safe" and "enjoyable to drink" aren't always the same thing.
If you live in London, the South East, or the East Midlands, your water is hard. Very hard. It tastes of chalk, furs up your kettle in weeks, and leaves limescale rings on everything it touches. If you live in Scotland, Wales, or the Lake District, you've got beautifully soft water straight from the tap and probably can't understand what the fuss is about.
Filtering your water isn't about safety — it's about taste. And once you try it, you won't go back.
UK Water Hardness: A Regional Guide
Water hardness is measured in milligrams of calcium carbonate per litre (mg/l). The higher the number, the harder the water.
| Region | Hardness Level | Typical mg/l |
|---|---|---|
| London & South East | Very Hard | 280–350+ |
| East Anglia | Very Hard | 300+ |
| East Midlands | Hard | 200–300 |
| Yorkshire | Moderately Hard | 150–250 |
| North West | Soft–Moderate | 50–150 |
| Wales | Soft | 30–80 |
| Scotland | Very Soft | 20–50 |
| Lake District | Very Soft | 10–40 |
Does Filtering Really Change the Taste?
Yes. Demonstrably.
Carbon-based filters (like those in Brita and BWT jugs) reduce chlorine, which is the biggest taste offender in UK tap water. They also reduce some limescale, heavy metals, and organic impurities. The result is cleaner, fresher-tasting water that makes better tea and coffee too.
A simple blind test: pour a glass straight from the tap and a glass through a filter jug. The difference in a hard-water area is immediately obvious.
Filter Jug Reviews
The most popular and practical way to filter water at home. Fill the jug, the water passes through a cartridge, and you pour from filtered. Simple.
Best Filter Jugs in the UK
| Jug | Capacity | Filter Type | Price | Replacement Filters |
|---|---|---|---|---|
| Brita Marella | 2.4L (1.4L filtered) | MAXTRA PRO | ~£20 | ~£5/month |
| BWT Penguin | 2.7L (1.5L filtered) | Magnesium Mineralizer | ~£18 | ~£5/month |
| ZeroWater 12-Cup | 2.8L | 5-stage ion exchange | ~£30 | ~£8/month |
| Phox Wave | 2.2L | Modular cartridge | ~£30 | ~£4/month |
| Brita Style | 2.4L (1.4L filtered) | MAXTRA PRO | ~£25 | ~£5/month |
The Verdict
- Best overall: Brita Marella — the standard for good reason. Widely available replacement filters, consistent quality, fits in most fridge doors.
- Best for taste: BWT Penguin — adds magnesium, which genuinely improves flavour. Particularly good for coffee and tea.
- Most thorough filtration: ZeroWater — removes virtually everything. The included TDS meter lets you test your water. Pricier on filters but unmatched purity.
- Best for sustainability: Phox Wave — refillable cartridge system, significantly less plastic waste than competitors.
Beyond Jugs: Other Filtration Options
Tap-Mounted Filters
Screw directly onto your kitchen tap. Faster flow than a jug, no waiting for filtration.
- Brita On Tap — around £25 plus replacement cartridges. Easy to install, no plumber required.
Under-Sink Systems
Plumbed in, dedicated filtered water tap. The premium option.
- Brita mypure P1 — from around £100 installed. One filter per year.
- Doulton — British-made ceramic filters. Premium quality, long-lasting cartridges.
Filter Bottles for On the Go
- Brita Fill & Go Active — £10, disc filters last about a month. Ideal for the gym or commute.
- Water-to-Go — £20, NASA-developed filter technology. Removes 99.9% of contaminants.
Serving Filtered Water: The Carafe Way
Once you've filtered your water, serve it properly. A glass carafe in the fridge means cold, filtered water is always ready. On the dinner table, it transforms tap water into something that feels considered.
Add simple garnishes for extra appeal:
- Cucumber slices — classic, clean, refreshing
- Lemon wheels — bright and citrusy
- Fresh mint sprigs — herbaceous and cooling
- Frozen fruit — acts as ice cubes and looks beautiful
See our carafe buying guide for the best water carafes at every price point.
The Environmental Case for Filtering
The UK spends over £2.5 billion annually on bottled water. Most of it is tap water that's been filtered and bottled in plastic. Filtering at home is:
- Cheaper — roughly £5/month for filter refills vs. £30+ on bottled water
- Better for the environment — eliminates hundreds of plastic bottles per household per year
- Just as good — many filter jugs exceed the quality of popular bottled water brands
A reusable glass carafe filled from a filter jug is the most elegant, affordable, and sustainable way to drink water at home.
Filter Your Water — because taste matters. Part of Carafe.