At the start of every school year, attention naturally turns to school cafeteria menus, nutritional balance, or even the reception conditions for students. But another element accompanies children throughout their day: the water they drink at school.

Water served at the table in the cafeteria, fountains, taps used to fill water bottles, or water used to prepare meals: in a school setting, the uses are numerous. And while tap water is subject to permanent health monitoring in France, its quality also depends on what happens inside the building.

This issue takes on a particular dimension at the start of the 2026 school year. Since the beginning of the year, health monitoring of drinking water has incorporated new parameters, including PFAS. In April, an instruction from the Ministry of Health also called for strengthening the monitoring of lead in the water of establishments hosting sensitive populations.

So, how is the water in schools and cafeterias monitored? Which contaminants should we be aware of? And why can an establishment's internal network be as important as the quality of the water delivered to it?

Is the water served in schools monitored?

Yes. In France, tap water is one of the food products subject to the most significant controls. Health monitoring takes place from the resource used to produce the drinking water to its distribution to the consumer.

This monitoring relies in particular on two complementary levels: surveillance carried out by the person responsible for the production or distribution of the water, and health monitoring conducted by the Regional Health Agencies (ARS).

Analyses focus on various microbiological, physical-chemical, and chemical parameters. Their nature and frequency depend in particular on the characteristics of the production and distribution system.

Since January 2026, this control has evolved further to align with the European framework. New parameters have been integrated, including PFAS and haloacetic acids.

But when talking about a school, an essential distinction must be made: the quality of water distributed by the public network and the quality of water at the tap inside the building are not necessarily exactly the same thing.

Why can water quality change inside a school?

Water may arrive in compliance at the point of delivery and yet change as it circulates through a building's internal network.

The reason is simple: after entering the establishment, it passes through pipes, fittings, taps, and various equipment whose materials, condition, and maintenance can influence its quality.

In an old building, for example, certain materials can promote the presence of metals in the water. Stagnation is also an important parameter: when a water point is used infrequently for a long period, the water remains in contact with the materials of the internal network.

This situation is particularly relevant in schools. Weekends, holidays, and summer closures can lead to long periods during which certain parts of the network are very rarely used.

The Ministry of Health also points out that, in establishments providing water to the public such as schools, hospitals, or restaurants, the person responsible for the establishment must ensure the compliance of the water delivered. They must also check their internal network and carry out the necessary work to guarantee water quality.

In other words, the monitoring carried out on the public network does not exempt the establishment from being concerned about its own installations.

Lead in water: why are schools particularly monitored in 2026?

This is one of the major developments of this school year.

On April 16, 2026, the General Directorate of Health published an instruction specifically devoted to the presence of lead in water intended for human consumption.

It invites those responsible for the internal networks of establishments hosting populations sensitive to the risk of lead poisoning to check the lead concentration at taps used for food-related purposes and to implement the necessary management measures in case of exceeding the regulatory limit.

Schools are among the buildings for which this issue deserves particular vigilance due to the presence of children.

The lead present in water does not generally come from the resource itself. It can notably originate from the dissolution of lead contained in certain old elements of the distribution network, particularly internal pipes.

The concentration at the tap can vary according to several factors: presence of lead in the installation, characteristics of the water, temperature, and especially the length of time the water has remained in contact with the pipes.

The regulatory quality limit currently applicable to lead in water intended for human consumption is 10 µg/L. This value is set to be lowered further as part of the evolution of European regulations.

When an internal network containing lead is identified as the source of the problem, one must primarily act on that source. The Ministry of Health reminds us that removing lead pipes is the permanent solution to eliminate this risk related to the internal network.

Filtration should therefore not be considered a systematic substitute for renovating a degraded installation.

After the summer holidays, why does water stagnation deserve special attention?

Imagine a school building closed for several weeks. Some taps have not been opened since the beginning of the holidays and the water has remained stationary in part of the internal network.

At the start of the school year, this water should not be considered exactly like water that has just arrived from the public network.

Stagnation prolongs contact with pipe materials. In certain configurations, it can thus promote the release of metals. It can also contribute to changing microbiological conditions in internal networks when the management of the installations is insufficient.

This is why putting a building back into service after a long closure must include attention to water points and the internal network.

In the context of lead-related risk, the Ministry of Health recommends, in particular, letting the water run after a period of stagnation before consuming it. For cafeterias and food businesses, tap water used to produce food must be flushed to renew the water contained in the internal pipes when it has stagnated.

The start of the school year is therefore a relevant moment to check the condition of water points, identify infrequently used taps, and ensure that the recommissioning procedures have been correctly applied.

PFAS, pesticides, bacteria: which contaminants can be monitored?

Lead is obviously not the only parameter monitored in drinking water.

Regulations cover numerous microbiological and chemical parameters. Among the substances attracting particular attention today are certain pesticides and metabolites, nitrates, various metals, as well as PFAS.

Since January 2026, the regulatory monitoring of PFAS in drinking water has taken a new step. The French health monitoring program now includes the regulatory testing of these substances in accordance with the evolution of the European framework.

To understand what these "forever pollutants" are and how to consult the information available for your territory, you can read our article Tap water and PFAS: how to know if your water is affected?.

However, it is important not to confuse all the issues.

Some contaminants may be present in the resource used to produce drinking water and are therefore managed at the production and public network level. Other issues may appear or intensify in the building's internal network.

Lead perfectly illustrates this second situation: an analysis performed on the public network does not necessarily provide the exact concentration at the tap of a school with an old internal installation.

Our article dedicated to contaminants present in tap water in France reviews in more detail the different families of substances that can be monitored.

School cafeterias: what water can be used for drinking and preparing meals?

The Public Health Code defines water intended for human consumption as clean and wholesome water that can be used for drinking, preparing and cooking food, as well as for various domestic uses.

In a school cafeteria, the issue therefore does not only concern the glasses of water served to children.

Water can be involved in:

• preparing and cooking food;
• washing certain products;
• preparing drinks;
• filling carafes;
• cleaning and various activities related to catering services.

The quality of the internal network is therefore particularly important in these spaces.

Large establishments open to the public are also subject, under certain conditions, to an obligation to provide drinking water fountains. Regulations require, in particular, at least one fountain for establishments concerned that can accommodate 301 people simultaneously, then one additional fountain for every 300 people. Access must be free and open.

However, the presence of a fountain is not enough: as with any water point, its connection, maintenance, and the conditions of water circulation must be correctly mastered.

What checks should be carried out in a school or cafeteria?

The right approach does not consist of systematically installing additional treatment "just in case." One must start by understanding the network and identifying the risks.

Several points can be checked:

• the age and nature of the internal pipes;
• the possible presence of lead or old materials;
• areas of the network where water can stagnate;
• the condition and cleanliness of taps and fountains;
• any treatment equipment already present;
• the temperature of the cold water;
• the available results concerning the quality of the distributed water;
• additional analyses when a particular risk is identified.

For lead, the instruction published in 2026 also provides concerned managers with recommendations regarding the sampling program in buildings.

This approach is important because two establishments located in the same municipality and supplied by the same public network can present different situations if their internal installations are not comparable.

How to improve the quality of water distributed in a school?

There is no single answer. The solution depends on the problem identified.

If lead pipes are responsible for contamination, the sustainable response is to intervene on those pipes. If the difficulty stems from significant stagnation, the management of the network and usage points must be reviewed. If a contaminant present in the distributed water requires additional treatment, a suitable filtration solution can be studied.

Filtration can be installed at a specific point of use or centrally. In an establishment welcoming many people, sizing becomes essential: an installation must be able to maintain a flow rate compatible with the building's simultaneous needs.

FLX Water, in particular, has a solution for commercial uses offering a flow rate of up to 5 m³/h. It can be integrated into a strategy regarding the centralized treatment of an establishment's water, depending on the quality of the water to be treated and the site's needs.

However, such an installation must come after the diagnostic, not replace it. The choice of treatment must be determined by the parameters actually present in the water, the desired performance, and the network configuration.

In a school, water quality therefore relies on several links: the quality of the water provided by the public network, the condition of the internal installations, their maintenance, monitoring, and, when justified, an appropriate additional treatment.

Frequently Asked Questions

Is tap water drinkable in schools?
Water made available to the public must meet the requirements applicable to water intended for human consumption. Establishments that provide water to the public must also ensure its compliance and monitor their internal network.

Why can there be lead in a school's water?
Lead can come from old elements of the internal network, particularly certain pipes. Its concentration at the tap depends notably on the materials and the water's stagnation time.

What does the 2026 regulation change?
Health monitoring of drinking water has incorporated new parameters since January 2026, including PFAS. An instruction from April 2026 also strengthens the lead monitoring process at food-related points of use in establishments hosting sensitive populations.

Should a school's water be systematically filtered?
No. The need for additional treatment depends on the quality of the water and the internal network. One must identify the problem before choosing a treatment technology.

What to do after a long school closure?
The internal network and water points must undergo appropriate recommissioning. Particular attention must be paid to water that has stagnated, especially before using it for drinking or food preparation.

At the start of the school year, checking water does not mean calling into question the general quality of tap water in France. It is rather a matter of looking at its entire journey. Between the drinking water production plant and the glass placed on a cafeteria table, the final meters are inside the establishment. And they, too, deserve to be monitored.

Sources

• Ministry of Health – Water and lead
  Information on lead in tap water, the responsibilities of establishments providing water to the public, and the sampling campaign implemented in 2026.
• General Directorate of Health – Instruction DGS/EA4/2026/54 of April 16, 2026
  Instruction regarding the presence of lead in water intended for human consumption and monitoring in the internal networks of establishments hosting sensitive populations.
• Ministry of Health – Monitoring tap water quality
  Presentation of health monitoring carried out by ARSs and the surveillance of water intended for human consumption.
• Ministry of Health – What changes in 2026 in the health field
  Evolution of the drinking water health monitoring program and integration of new parameters, notably PFAS and haloacetic acids.
• Ministry of Health – Recommendations for preventing lead exposure
  Recommendations concerning water stagnation, lead pipes, and water use in cafeterias and food businesses.
• Légifrance – Public Health Code, articles relating to water intended for human consumption
  Definition of water intended for human consumption and obligations applicable to those making water available to the public.
• Légifrance – Environmental Code, article D.541-340
  Provisions regarding the provision of drinking water fountains in certain establishments open to the public.