Water Filter Comparison
ZeroWater vs Waterdrop
An honest, data-driven comparison of two popular UK water filters — what they remove, what they cost to run, and which one belongs in your kitchen.
Our verdict
Key difference: ZeroWater goes further than almost any jug or tap filter on the market — its 5-stage system strips water to near-zero dissolved solids. Waterdrop takes a more balanced approach, targeting chlorine and lead without stripping minerals that contribute to taste.
If maximum contaminant removal is your priority — particularly PFAS, fluoride, nitrate, or arsenic — ZeroWater is the more capable filter and the only jug certified to NSF/ANSI 401. Waterdrop is the better option if you want filtered water at the tap without fussing over a jug, and do not need that level of contaminant removal. ZeroWater's higher running cost is the key downside, especially in hard water areas.
ZeroWater is best for
Maximum contaminant removal including PFAS and fluoride
Waterdrop is best for
Convenient tap-mounted filtration for chlorine and basic contaminants
Specs at a glance
Filter 1
ZeroWater
12-Cup Ready-Pour
Filter 2
Waterdrop
WD-FC-06 Tap Filter
Price
£40
£30
Annual filter cost
~£120/yr
~£48/yr
Rating
4.3/5
4.3/5
Type
jug
countertop
Filter life
2–4 weeks depending on TDS
3 months
Flow rate
—
2.0 L/min
Certifications
NSF/ANSI 53, NSF/ANSI 401
NSF/ANSI 42
What it removes
Head-to-head breakdown
Filtration technology
ZeroWater winsZeroWater
5-stage ion exchange — removes virtually all dissolved solids
Waterdrop
Single-stage carbon block — targets chlorine and lead
Certifications
ZeroWater winsZeroWater
NSF/ANSI 53 (heavy metals) + NSF/ANSI 401 (PFAS, pharmaceuticals)
Waterdrop
NSF/ANSI 42 (chlorine and taste only)
Running cost
Waterdrop winsZeroWater
~£120/year — filters exhaust quickly in hard water areas
Waterdrop
~£48/year — 3-month cartridges are cost-effective
Convenience
Waterdrop winsZeroWater
Jug format — 12-cup capacity, slow pour, needs pre-filling
Waterdrop
Tap-mounted — instant filtered water on demand at full flow
TDS monitoring
ZeroWater winsZeroWater
Includes TDS meter — know exactly when to replace the filter
Waterdrop
No TDS monitoring — replace on schedule (3 months)
Buy either filter
Jug Filter
ZeroWater 12-Cup Ready-Pour
Maximum contaminant removal including PFAS and fluoride
£40
- NSF-certified to remove PFAS and heavy metals
- Includes TDS meter so you can verify performance
- 5-stage filtration in a simple jug format
Countertop
Waterdrop WD-FC-06 Tap Filter
Convenient tap-mounted filtration for chlorine and basic contaminants
£30
- Clips onto most standard UK taps in minutes
- Switch between filtered and unfiltered flow
- Compact design that doesn't dominate the counter
Common questions
Does ZeroWater remove fluoride?
Yes. ZeroWater's 5-stage ion exchange filtration removes fluoride along with most other dissolved minerals. This makes it one of the only jug filters that can genuinely claim fluoride removal. If fluoride is a specific concern, ZeroWater is the right choice at this price point — the alternative is an under-sink reverse osmosis system.
Is ZeroWater or Waterdrop better for tap water taste?
It depends on what you find pleasant. ZeroWater removes virtually all dissolved solids, producing very flat, pure-tasting water — some people love it, others find it almost too neutral. Waterdrop removes chlorine but leaves minerals in, giving a crisper taste that is closer to good bottled water. Taste is subjective, but most people find the Waterdrop result more palatable as an everyday drink.
How often does a ZeroWater filter need replacing?
ZeroWater recommends replacing filters when the TDS meter reads 006 ppm. In soft water areas (below 100 mg/L hardness), a filter can last 4–6 weeks. In hard water areas like London or the South East (above 200 mg/L), you might need to replace every 2 weeks. Budget accordingly — at £120+ per year, ZeroWater is one of the pricier jug options to run.
See what is in your water
Enter your postcode to get a detailed water quality report for your area — so you know exactly which contaminants you need to target.