Water filter jug: what does it really remove?

Reading time: ~12 minutes

What is a water filter jug?

That makes it the simplest filter type there is: no installation, no tools, no connection to the water supply. You buy it, rinse through the first cartridge and put it in the fridge. That also explains why it is the best-selling filter type in the Netherlands, and why almost every supermarket and DIY store stocks one.

The jug belongs to the same family as the gravity filter, which uses the same principle but with much larger reservoirs and a different filter medium. There are also filters you screw onto the tap, dispensers with a tap and fixed systems under the sink. If you want to survey the whole field first, our pillar page puts the different filter types side by side.

How does a water filter jug work?

A filter cartridge in a jug usually does two things at once, and it helps to keep those two apart.

Activated carbon. Granules or a pressed block of carbon with an enormous internal surface area. Organic substances that cause odour and off-tastes cling to it. This is the part that makes the water taste “fresher”. Activated carbon is also the medium professional treatment uses to remove taste and odour compounds, so the technology itself is serious.

An ion exchanger. A resin that swaps calcium and magnesium ions for hydrogen or sodium ions. This is the part the jug uses to remove limescale from your tap water, so you see less white deposit in your kettle. Note the consequence: that ion exchanger also removes minerals that occur naturally in your drinking water.

The flow runs entirely on gravity. A full funnel takes a few minutes. That is also the most important practical limitation: you filter per jug, not per tap use, and you always have to remember it.

What does a water filter jug remove from tap water, and what doesn’t it?

This is where most product texts go wrong, so we are spelling it out. A jug is good at taste and hardness, and weak to absent on the substances people worry about today.

What a jug usually does: remove off-tastes and odour, catch part of the limescale and, with some brands, chlorine where present. In the Netherlands the latter is mainly relevant if you draw water from an old pipe or have just returned from abroad.

What a jug usually does not do: kill bacteria, hold back PFAS to a demonstrable degree, or bring heavy metals below the detection limit. For PFAS this matters: the RIVM uses an advisory value of 4.4 nanograms per litre in PFOA equivalents, while the Drinkwaterbesluit (the Dutch Drinking Water Decree) sets a maximum of 100 nanograms per litre for twenty PFAS. Those are tiny amounts, and a standard carbon cartridge in a funnel has not been tested for them. Anyone filtering specifically for PFAS is better off first reading which filter technology actually deals with PFAS.

A practical check you can do yourself: see whether the manufacturer names an independent test or certification and for exactly which substance. The NSF/ANSI 42, 53 and 401 standards are the common filtration standards in this market, and they cover different things. A claim without a standard and without a substance is not a claim.

Is a water filter jug worth it in the Netherlands?

That depends on what you expect from it, and the Dutch starting point is unusually favourable. According to Vewin, the association of Dutch drinking water companies, tap water meets the quality standards in 99.9 percent of measurements. The RIVM arrives at the same figure and adds that about 60 percent of our drinking water comes from groundwater and the rest from surface water, spread over roughly 200 abstraction sites.

More important still: Dutch tap water is distributed without chlorine. The RIVM states plainly that tap water contains “no chlorine”. In the United States and large parts of Southern Europe, chlorine taste is the main reason to buy a jug, and the marketing story of those jugs is built on it. In the Netherlands that argument largely falls away.

What remains is real and not to be dismissed: hardness and taste. Vitens (a Dutch drinking water company) explains that drinking water companies may not soften the water completely and must maintain a minimum hardness of 5.6 dH, and that limescale forms as soon as calcium reacts with carbonate when heated. If you live in an area with hard water, you notice it in your kettle and in your tea. A jug softens that.

At PureFilter we see that customers who start with a jug almost always get stuck at the same point: it is not the filtering that disappoints, it is the refilling. Two litres at a time is little if you also cook, make coffee and fill bottles.

Brands, models and prices at a glance

The market is easier to survey than it looks. In the Dutch shopping results on 8 November 2026, Brita is by far the most present brand, with Laica, ZeroWater, Philips, Teesa and Aquaphor around it. The prices we measured that day run from roughly €15 to €55 for the jug itself.

Two things stand out. First: the purchase price says almost nothing, because the money is in the cartridges. Second: the brands differ precisely in what the cartridge does. ZeroWater uses a multi-layer cartridge to aim for the lowest possible TDS value, which is something quite different from improving taste. If you want to weigh the two against each other, you will find the details in our review of ZeroWater in the Netherlands and in the extensive Brita review.

Points to watch: what goes wrong in practice

The cartridge stays in too long

This is by far the most common mistake. A saturated carbon cartridge not only filters less, over time it also becomes a warm, moist place where bacteria can settle. A jug that is forgotten on the counter is therefore worse than no jug at all. How often it needs changing, and why the manufacturer keeps that interval so short, is covered in our piece on how often you replace a Brita filter.

The jug sits outside the fridge

Filtered water lacks the slight natural buffering that tap water has. So do not leave it standing at room temperature for days, but treat it like fresh water: store it cool and drink it within a day. That principle applies to all stored tap water, as we explain in how long tap water stays good.

The volume disappoints

A household drinks and cooks several litres a day between them. With a 2.4-litre jug of which half sits in the funnel, you spend much of the day waiting. That is no small thing: it is the reason jugs often disappear into a cupboard after a few months.

Minerals disappear with it

The ion exchanger that removes limescale takes calcium and magnesium with it. Those are precisely the minerals in drinking water that give it a full taste. Many people therefore find filtered jug water a little flat.

Water filter jug or fixed filter: the comparison

Put the jug next to the other routes and the difference in what you get back quickly becomes clear.

The honest summary: on convenience and demonstrable filtering, a fixed filter wins; on purchase price and entry threshold, the jug wins. If you want to know which of the two suits your kitchen, which water filter suits me walks through that trade-off step by step, and on or under the counter compares the two fixed variants.

What does a water filter jug cost per year?

The purchase is the cheapest part of the story. The jugs we measured in the shopping results on 8 November 2026 cost €16.76 to €48.95. After that begins the cartridge subscription that is not called a subscription. Manufacturers reckon with a cartridge that is replaced after a few weeks, so you quickly end up at more than ten cartridges a year.

Work it out yourself with the price of your brand’s cartridges and the amount of water you filter per day. That second number often surprises people: it is a lot higher than they think once coffee, tea and cooking count. How much you actually drink, you can calculate at how much water you need per day.

For comparison, and with our own prices of today: the PureFilter Mineral+ costs €149.00 including the first filter, a separate replacement filter €65.00, and with the Filter Plan you pay €48.00 per year for 1 to 3 people. The water itself costs next to nothing on top of that; what a cubic metre costs exactly is covered in what a cubic metre of water costs. You will find the full calculation for different households in water filter costs per household.

Buying advice: when is a jug enough?

A water filter jug is enough if: you live alone or as a couple, mainly want to tackle taste and limescale, do not want to drill holes or change anything to the pipework, and do not mind remembering it every day. In a rented home where you may not fit anything, this is often the only route, although there are also filter solutions for tenants that go further.

A jug is not enough if: you are more than two people, also want to filter cooking and coffee water, or are specifically aiming at PFAS or heavy metals. In that case a filter you do not have to refill is the logical step. And anyone torn between brands and types should first read what the healthiest water filter is or the comparison on our best water filter page.

Frequently asked questions

Conclusion

A water filter jug is a fine purchase for what it really is: a cheap, low-threshold way to soften the taste of your tap water and get a little less limescale in your kettle. It costs €16.76 to €48.95, needs no installation, and for a one- or two-person household that is often enough.

But do not expect purification from it. In the Netherlands the water already starts at 99.9 percent compliance and without chlorine, and precisely the substances the question is about today, PFAS and heavy metals, are exactly the substances a standard carbon cartridge in a funnel has not been tested for. On top of that, the jug gives you work every day and the cartridge has to be replaced every few weeks.

If you want to be rid of that work and want to see which substances were tested for, a fixed filter behind the cold water tap is the next step. You can read more about the warranty and the approach at purefilter.nl, and practical questions about installation and maintenance are in the frequently asked questions. If PFAS is a particular concern for you, take a look at our PFAS page.