Harmonised PFAS monitoring in drinking water has applied since January 2026

Since 12 January 2026, Member States have been required to monitor PFAS in drinking water using a harmonised approach. This obligation creates analytical needs, but does not automatically indicate that new treatment is required.

A common monitoring obligation since 12 January 2026

Member States must now monitor PFAS levels in drinking water in a harmonised manner. The requirement has applied since 12 January 2026. It therefore concerns drinking water services, operators, laboratories and local authorities whose water resources are monitored. It places measurement at the start of the decision-making process.

However, measurement methods and the list of monitored substances may change. A uniform legal threshold should therefore not be inferred solely from the principle of harmonised monitoring. To qualify an account, we must examine the control system actually applied and the available results.

Measurement and treatment address two separate needs

Implementing monitoring does not prove that an exceedance has been identified. It may create a need for sample preparation, analysis, instrumentation or laboratory services. The need for treatment arises at a later stage, depending on the measurements obtained and the decisions made by the operator. Suppliers must therefore separate analytical offerings from treatment solutions.

When contamination requires action, several responses are possible. These may include closing contaminated wells or adding treatment stages. Compliance may also be achieved by changing the water source, dilution or optimising an existing treatment process. A contract with an already approved laboratory may also meet the analytical requirement without the purchase of new equipment.

Commercial qualification based on resources and results

Targeting can begin with drinking water utilities, operators, laboratories and local authorities whose resources are subject to monitoring. We then qualify accounts according to the resource concerned, the existence of measurements and the potential publication of an exceedance. This sequence avoids treating every monitoring obligation as an equipment project. It also distinguishes accounts with an immediate need from those still structuring their monitoring.

Contacts vary according to the nature of the requirement. For analysis, discussions mainly involve the water quality manager, the laboratory or technical management. For treatment, operations and technical management play a more direct role. On the supplier side, commercial management or the drinking water market manager must adapt the approach to each of these profiles.

What this changes for suppliers

The obligation creates opportunities for suppliers of PFAS treatment, sample preparation, analysis and associated instrumentation. However, it does not justify uniform outreach to all drinking water operators. We recommend building account lists based on monitored resources, measurement systems and publicly available results. The commercial message must specify whether it addresses an analytical or treatment requirement.

For accounts with no confirmed exceedance, the approach must focus on sampling, preparation and analysis capabilities. For accounts facing contamination, it may include adding treatment stages, while taking other possible responses into account. Closing a well, changing the abstraction point, dilution or optimising an existing facility may reduce the need for new equipment. Rigorous qualification therefore focuses commercial efforts on situations where the offer corresponds to an identifiable decision.