In brief. Drinking water in the EU and the Netherlands is strictly regulated and is among the safest in the world, so a filter is usually a matter of preference rather than safety. People mainly filter water for its taste, the smell of chlorine, or limescale and hardness. Activated carbon improves taste and smell, while reverse osmosis removes a much wider range of dissolved substances. No single filter is right for everyone, and no one device does everything equally efficiently. Every filter needs regular maintenance for taste and hygiene. The right choice depends on your preferences and your water, not its safety. This is information, not medical advice.
Is tap water in the Netherlands and the EU safe to drink?
Yes. In the European Union, including the Netherlands, drinking water is governed by the EU Drinking Water Directive and national rules, and it is tested regularly before it reaches your tap. By international standards, it is among the safest drinking water in the world. A water filter is therefore usually a matter of personal preference, such as taste or hardness, and not a way to make unsafe water safe. This article does not claim that tap water is dangerous or contaminated; it simply explains how filters work for anyone who wants to use one. You can also view our molecular hydrogen tablets.
Because regulated tap water already meets strict quality requirements, the honest reasons for filtering are mainly about comfort and taste. That is the perspective we take in this guide.
Why do people choose to filter their water?
The reasons are practical and personal, not safety scare stories. The most common are taste, the smell of chlorine that some water companies add for hygiene, and limescale from hard water that can leave deposits in kettles and on glassware. Some people simply prefer the taste of filtered water or like having chilled, filtered water available. None of these reasons means the underlying tap water is harmful; they are about preference and convenience.
What are the main types of water filter?
Filters differ in what they target, how they work, and how much maintenance they need. The overview below is for information.
| Filter type | How it works | General feature (for information) |
|---|---|---|
| Activated carbon (jug or tap) | Binds certain substances to carbon | Improves taste and reduces the smell of chlorine, easy to use |
| Reverse osmosis | Forces water through a fine membrane | Removes a wide range of dissolved substances, uses more water |
| Ion exchanger or water softener | Exchanges hardness minerals for others | Reduces limescale, changes the mineral balance of the water |
| Mechanical or sediment filter | Physically traps particles | Captures sediment and fine particles, often used as a pre-filter |
| UV method | Uses ultraviolet light | Targets microorganisms, changes neither taste nor minerals |
No single filter is right for every situation. The most suitable filter depends on your goal, your water, and how much maintenance you are prepared to do.
What can a water filter not do?
A filter is a tool with limitations. A simple carbon jug mainly improves taste and smell and does not remove everything dissolved in water. Reverse osmosis removes much more, but it also removes minerals and produces some wastewater. Softeners reduce limescale efficiently, but they change the mineral balance and are not designed for purification. One filter alone therefore cannot fulfil every purpose equally well. Importantly, in an area with safe, regulated tap water, a filter is an improvement in taste or comfort, not a solution to a safety problem that does not exist. Always follow the manufacturer's instructions for the specific device.
How do you maintain a water filter?
- Replace filter cartridges on time, because a saturated filter works less effectively and can become a place where bacteria grow.
- Follow the manufacturer's instructions for replacement intervals, cleaning, and storage.
- Keep the system clean and use filtered water reasonably fresh instead of leaving it to stand for a long time.
- Match the filter to your goal, such as carbon for taste or a softener for limescale, instead of expecting one device to do everything.
Frequently asked questions
Do I need a water filter if tap water is already safe?
No, not for safety. In the EU and the Netherlands, regulated tap water already meets strict quality requirements and is monitored efficiently and regularly for hygiene. A filter is a personal choice for taste, the smell of chlorine, or limescale, not a requirement for making water that is already safe safe. One device does not need to do everything.
Does a water filter remove beneficial minerals?
That depends on the type. A simple carbon filter mainly affects taste and chlorine and leaves most minerals in place. Reverse osmosis removes a much wider range of dissolved substances, including minerals, which is why some systems add minerals afterwards.
What is the difference between activated carbon and reverse osmosis?
Activated carbon binds certain substances and mainly improves taste and smell. Reverse osmosis forces water through a fine membrane and removes a much wider range of dissolved substances, but it is more complex and uses more water. They serve different purposes, and neither does everything efficiently on its own.
Does filtered water taste better?
Many people think so, especially when a carbon filter reduces the smell or taste of chlorine. Taste is subjective, so this is a matter of preference and not a measure of safety.
How often should I replace a filter cartridge?
Follow the interval specified by the manufacturer of your device, as this depends on the cartridge and your usage. A cartridge used for too long works less efficiently, so timely replacement is important for both taste and hygiene. This keeps the same device reliable in use.
Sources
- Directive (EU) 2020/2184 of the European Parliament and of the Council on the quality of water intended for human consumption (recast). eur-lex.europa.eu
- World Health Organization. Guidelines for drinking-water quality. who.int
- European Environment Agency. Information on drinking water quality in Europe. eea.europa.eu
Written by the NOTFORTOMORROW editorial team. How we research: we base factual statements on official EU legislation and recognised water-quality authorities, cite our sources, and date our reviews. This article is for information, not medical advice; speak to a qualified professional about your situation. You can find our supplements in our full range. Last reviewed: 2026-06-06.
