Environmental teams across Ireland and the EU are asking the same question.
What do the new PFAS drinking water regulations mean in practice, and what should we be doing now?
At Southern Scientific, we are seeing a sharp increase in enquiries as EU requirements around PFAS monitoring move closer to enforcement.
This article explains what PFAS are, why regulation is tightening, and how organisations can prepare with confidence.
What the new EU Drinking Water Directive Means for PFAS and Ireland
In January 2026, new provisions under the EU’s recast Drinking Water Directive (Directive 2020/2184) came into effect that specifically target PFAS in drinking water across the European Union, including Ireland. These rules introduce mandatory, harmonised monitoring of PFAS levels and set binding limit values that Member States must meet.
Under the directive, the sum of 20 priority PFAS compounds must not exceed 0.1 µg/L (100 ng/L) in drinking water, and the total concentration of all PFAS detected must be below 0.5 µg/L (500 ng/L). Member States are now required to test supplies regularly, report results (including exceedances) to the European Commission, and take action where limits are breached — ranging from enhanced treatment to supply restrictions or notifying the public.
Ireland has transposed this directive into national law through the European Union (Drinking Water) Regulations 2023, meaning Irish water suppliers (such as Uisce Éireann and group water schemes) are responsible for ensuring compliance with these PFAS standards as part of their statutory duties. This represents a significant shift from earlier guidance-level approaches to enforceable PFAS limits and systematic surveillance of drinking water quality.
What are PFAS?
PFAS (per- and polyfluoroalkyl substances) are a group of synthetic chemicals used to make everyday products more resistant to heat, water, grease, and stains.
They are often referred to as “forever chemicals” because they do not break down easily.
This persistence is what makes PFAS useful industrially, but it also means they can accumulate in soil and water for decades or even thousands of years.
Why are PFAS a concern in drinking water?
While very small amounts of PFAS are not always harmful, elevated concentrations over time are linked to long-term health risks.
Because PFAS can travel through groundwater and surface water, drinking water supplies are a key focus for regulators.
As scientific understanding has advanced, regulators across Europe have moved from guidance to enforceable limits.
What is changing under EU PFAS regulations?
Under the revised EU Drinking Water Directive, Member States are required to:
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Monitor PFAS in drinking water supplies
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Detect concentrations at very low levels
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Take action where thresholds are exceeded
This applies to public bodies and any organisation responsible for supplying drinking water.
Expectations around monitoring are rising. The question is no longer if PFAS testing is required, but how it will be managed on an ongoing basis.
Why active monitoring is essential
PFAS regulation is not a one-off compliance exercise.
Because PFAS persist in the environment, regular monitoring is the only way to understand trends, identify risks early, and stay ahead of regulatory limits.
Active monitoring allows organisations to:
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Track PFAS levels over time
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Identify changes before they become compliance issues
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Make informed decisions based on reliable data
How Southern Scientific supports PFAS compliance
Southern Scientific is among a small number of laboratories in Ireland accredited for PFAS testing.
We provide science-based testing as part of our wider water and soil quality services, working with:
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Public bodies
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Commercial organisations
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Communities and water schemes
Our focus is on clarity, accuracy, and practicality.
Our PFAS testing process
We make PFAS testing straightforward.
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Sample collection
Our technicians collect samples from designated testing points using accredited methods. -
Laboratory analysis
Samples are analysed in our laboratories using sensitive instrumentation capable of detecting PFAS at regulatory levels. -
Clear reporting
Results are transmitted directly from our instruments into our client portal.
You receive a clear report with key insights delivered to your email. -
Practical guidance
Where possible, we advise on next steps so you can make confident, informed decisions.
Preparing for PFAS testing requirements
If your organisation supplies drinking water, now is the time to ask:
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Do we know our current PFAS levels?
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Are we monitoring consistently, not just reactively?
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Do we have accredited data we can stand over?
Early action reduces uncertainty and avoids last-minute compliance pressure.
Talk to our team
If you are considering how to manage new PFAS drinking water testing requirements, we are here to help.
A member of the Southern Scientific team can guide you through your next steps, from initial testing to long-term monitoring programmes.
Clarity starts with good data.
