Can you drink tap water in Poland? Facts, myths, and water quality | CzystyStyl Guide

For years, the question about tap water was: is it safe? Today, that question is still asked, but increasingly, another one appears alongside it: what exactly is in it? And that second question is harder to dismiss.

Can you drink tap water in Poland?

Yes. In the vast majority of Polish cities, tap water meets the requirements specified by national regulations and EU directives. Every day, it undergoes microbiological, chemical, and physical tests. In this regard, Poland is among the countries where tap water is safe to drink without boiling.

However, sanitary safety is not the only question people are asking today. Why does water taste different in various parts of the same city? Where does limescale in the kettle come from? What happens to the water between the treatment plant and the home? To answer these questions, one needs to look at the entire system, not just the treatment process itself.

The quality of water leaving the plant is not the same as the quality of water at the tap

Water from the treatment plant may meet all quality standards, and then travel many kilometers through the transmission network, connections, and building installations of vastly different technical conditions. At each of these stages, its composition, taste, and smell can change. Residents of two buildings in the same block can have completely different experiences with the same tap water, and this is not an isolated situation.

300 thousand kilometers of pipes

The total length of the water supply network in Poland exceeded 343 thousand kilometers by the end of 2024 (GUS data). A significant part of this infrastructure has been modernized in recent decades, but the scale of the problem is considerable: according to reports from the Supreme Audit Office, in many Polish cities, over half of the water supply network's length consists of pipes operating for more than 50 years, and another 45% are pipes aged 25–50 years.

This doesn't necessarily pose a health risk, but it does mean that the technical condition of the infrastructure becomes one of the factors influencing the final parameters of the water. And this is a factor over which the average user has no control.

Water utilities control their network. Who controls the pipes in the building?

This question rarely comes up in public discussion, but it should. Water utility companies are responsible for the quality of water supplied to the network, conduct tests, and publish results. However, the final stage of water's journey passes through installations inside buildings, and their condition depends on the age of the property, conducted modernizations, and operation methods.

In many cases, the user knows the test results published by the water utility, but has no knowledge of the condition of the installations a few meters from their own kitchen. The least known segment of the entire water system is usually this last one.

Why sometimes yellow water flows from the tap

After a breakdown or technical work in the network, some of the deposits accumulated over years on the pipe walls get into the flowing water. These are mainly iron and manganese compounds, which change the appearance, taste, and smell. This is usually a temporary situation and does not indicate source contamination.

However, it means something else: that transport has a real impact on what ultimately reaches the tap. And that the infrastructure between the water utility and your apartment is not a neutral cable, but an active element of the entire system.

Trace contaminants, or the unseen problem

For years, water quality assessment focused on bacteria, viruses, heavy metals, and basic chemical parameters. Today, the list of substances that experts pay attention to is much longer.

Trace contaminants are compounds present in very small concentrations, often in micrograms or nanograms per liter. They do not affect the taste, smell, or appearance of water, so their presence cannot be assessed independently. These include pharmaceutical residues, selected pesticides, industrial substances, and by-products of disinfection processes. New European regulations are extending the scope of mandatory monitoring to this group.

PFAS, or why all of Europe started talking about forever chemicals

PFAS are several thousand synthetic chemical compounds used for decades in non-stick coatings, waterproof materials, fire-fighting foams, and technical products. Their distinctive feature is their extreme durability; they degrade very slowly in the natural environment.

This does not mean that all Polish tap water contains dangerous concentrations of these substances. However, it does mean that the list of parameters by which water quality is assessed is constantly growing. And that is why the topic of water filtration is no longer just a matter of taste or limescale in the kettle.

Microplastics in water, a topic that practically didn't exist a few years ago

Research conducted worldwide has shown the presence of microplastics, tiny particles of plastic, in surface water, bottled water, and tap water alike. These particles are formed from tire abrasion, packaging degradation, the wear of synthetic clothing, and the breakdown of larger plastic elements.

Scientists are still studying the long-term effects of microplastics on the human body. However, their widespread occurrence has made them one of the main areas of research into drinking water safety. For the home user, this means one thing: the discussion about water quality has long moved beyond chlorine and bacteria. The good news is that reverse osmosis effectively retains microplastic particles.

Hard water, a health or technical problem?

If there is one parameter that most often affects daily water use, it is hardness. Its consequences are primarily technical and financial: limescale accumulating on heating elements reduces the efficiency of devices, increases energy consumption, and shortens their lifespan. In many regions of Poland, this is a noticeable problem every day, regardless of whether the water meets sanitary standards.

As for health effects, research does not provide a clear answer here. Hard drinking water is not considered a health hazard, and water with a low salt content is safe. There are opinions that very high hardness may be important for the health of teeth, kidney function, or the digestive system in some individuals, but there is no scientific consensus on this. This topic is still being researched.

The impact of hard water on skin and hair during washing is more documented. Calcium and magnesium salts react with soap and detergents, leaving a thin layer on the skin that is difficult to rinse off. For many people, this results in a feeling of tightness, dry hands, or dull, rough hair after a shower. For people with sensitive skin or atopic dermatitis, hard water can exacerbate irritation and hinder the reconstruction of the hydrolipid barrier.

Why more and more people are filtering water

A few years ago, a filter was mainly associated with well water or improving taste. Today, the reasons are different. Growing awareness regarding the condition of infrastructure, the quality of building installations, PFAS, and microplastics means that more and more people want to have greater control over the water they drink every day.

This is not a lack of trust in water utilities. It is an understanding that between the treatment plant and the glass, there are many elements that the user cannot independently assess or control. Point-of-use filtration has become the final stage of treatment for many homes, the one that happens on the user's side.

Which filter solves a specific problem

Unsure which system to choose? We have prepared a practical guide: Under-sink water filter – which one to choose?

How to check the quality of water in your apartment

The simplest source of information is reports from the local water utility company, but they describe the quality of water in the network, not the parameters of water from a specific tap. If problems with sediment, taste, or odor appear in the building, it is worth considering an individual laboratory test or consulting a water treatment specialist.