{"id":17535,"date":"2026-05-19T07:00:59","date_gmt":"2026-05-19T06:00:59","guid":{"rendered":"https:\/\/isleutilities.com\/?p=17535"},"modified":"2026-05-22T19:06:38","modified_gmt":"2026-05-22T18:06:38","slug":"pfas-in-water-the-shift-from-treatment-to-system-level-management","status":"publish","type":"post","link":"https:\/\/isleutilities.com\/it\/pfas-in-water-the-shift-from-treatment-to-system-level-management\/","title":{"rendered":"PFAS in Water: The Shift from Treatment to System-Level Management"},"content":{"rendered":"<section class=\"l-section wpb_row height_large\"><div class=\"l-section-h i-cf\"><div class=\"g-cols vc_row via_flex valign_top type_default stacking_default\"><div class=\"vc_col-sm-12 wpb_column vc_column_container\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><div class=\"wpb_text_column\"><div class=\"wpb_wrapper\"><p><span style=\"font-weight: 400;\">Insights from the PFAS Forward Summit, and what they mean for water utilities.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">When you strip away the headlines on PFAS, tightening regulation, new treatment technologies, rising costs, the real story is more subtle.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">It\u2019s not about a single breakthrough or point of contention. It\u2019s about a shift in how the problem itself is being understood.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Based on Insights from a recent PFAS Forward Summit, three themes are starting to define how the sector is moving forward: scale, visibility, and system integration.<\/span><b><\/b><\/p>\n<h3><b>1. The scale problem is bigger than most frameworks can handle<\/b><b><\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Most regulatory and scientific discussions focus on a few thousand well-characterized compounds. But depending on how PFAS is defined, that number expands significantly:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Over 7 million PFAS-like structures under OECD definitions<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">More than 8 million when grouped by subclasses<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Potentially tens of millions when broader fluorinated chemistries are included<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">PFAS are not a fixed list, but a large, structurally defined and evolving class of chemicals, with varying levels of characterization across individual compounds.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">This creates a practical challenge, not because PFAS cannot be defined, but because their scale makes chemical-by-chemical regulation impractical.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">As a result, regulation is shifting toward group-based approaches, focusing on representing compounds rather than attempting to cover every substance individually.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">At the same time, advances in analytical science and data-driven tools are improving how substances are grouped, prioritized, and assessed, supporting more practical, system-level regulation.<\/span><b><\/b><\/p>\n<h3><b>2. Detection is shifting from precision to exploration<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">That shift in regulatory thinking is mirrored in how PFAS is being monitored.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Traditional monitoring, target analysis, focusses on known compounds. It\u00a0 works well, but only within the boundaries of what\u2019s already understood and regulated.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Non-target analysis (NTA), by contrast, is being used to explore what sits outside those boundaries:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Previously unknown or unregulated PFAS compounds<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Transformation products formed in the environment<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Additional chemical signals not captured through standard methods<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">What\u2019s changed is not the technology itself, but its role. NTA is no longer confined to research environments. It\u2019s now informing:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Early warning systems<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Regulatory investigations<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Industrial risk assessments<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">At the same time, even targeted analysis involves trade-offs. There are estimated to be around 12,000 PFAS compounds. In theory, each one could be tested individually, but in practice, testing costs scale with the number of compounds measured.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">As a result, monitoring frameworks deliberately focus on a subset- typically groups such as PFAS-4, PFAS-20 or PFAS-22 , selected because they are:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The most prevalent<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The most toxic<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Or the most reliably measurable.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">This means that when a result shows, for example, 50 ppt for PFAS-20, it does not represent the total PFAS present in the water. It reflects the most relevant and representative compounds within a much larger set.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Expanding analysis to hundreds or thousands of compounds is technically possible, but comes with rapidly diminishing returns in insight, at a disproportionately higher cost.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">In practice, the sector is shifting toward broader visibility combined with prioritisation, expanding what can be detected, while still making pragmatic decisions about what is feasible to measure.<\/span><b><\/b><\/p>\n<h3><b>3. Regulation is tightening, but not aligning<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Globally, PFAS regulation is becoming more stringent, but not more consistent.<\/span><\/p>\n<p><span style=\"font-weight: 400;\"><img decoding=\"async\" class=\"aligncenter wp-image-17602\" src=\"https:\/\/isleutilities.com\/wp-content\/uploads\/2026\/05\/PFAS-Forward-Action-Summit-2026-81-300x169.jpg\" alt=\"\" width=\"800\" height=\"451\" srcset=\"https:\/\/isleutilities.com\/wp-content\/uploads\/2026\/05\/PFAS-Forward-Action-Summit-2026-81-300x169.jpg 300w, https:\/\/isleutilities.com\/wp-content\/uploads\/2026\/05\/PFAS-Forward-Action-Summit-2026-81-1024x577.jpg 1024w, https:\/\/isleutilities.com\/wp-content\/uploads\/2026\/05\/PFAS-Forward-Action-Summit-2026-81-18x10.jpg 18w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>Different regions are taking distinct but well-established approaches:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The United States: ultra-low limits (4 ppt) for specific compounds<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The European Union: dual thresholds (500 ppt total \/ 100 ppt subset)<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The UK: 100 ppt total PFAS<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Asia-Pacific markets: a mix of compound-specific limits with varying ambition<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Even within Europe, the picture is more nuanced than headline figures suggest.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Thresholds vary depending on which PFAS groups are being measured, and in some cases, when regulations come into force.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">For example:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Germany applies 100 ppt for PFAS-20, with 20 ppt for PFAS-4 expected from 2028<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Denmark sets a lower 2 ppt limit for PFAS-4, while aligning more closely at 100 ppt for broader groupings (PFAS-22)<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The UK\u2019s 100 ppt total PFAS limit is based on a broader grouping (PFAS-48), rather than a small subset of compounds.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">So while it\u2019s presented as a wide divergence between countries, the reality is more measured:<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Variation is most pronounced in a small-group threshold (e.g., PFAS-4)<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">There is greater alignment at broader group levels (around 100 ppt)<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">For utilities, this adds to an already complex compliance landscape. Managing multiple contaminants each with its own limits, monitoring requirements, and treatment approaches, is well established practice.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">PFAS increases the scale and pace of change, requiring utilities to respond to broader definitions, tighter thresholds, and more dynamic regulatory expectations.<\/span><b><\/b><\/p>\n<h3><b>4. Investment is growing, but so it the gap<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Drinking Water treatment spending in Europe is projected to grow significantly between 2025 and 2031, with capital investment concentrated in a small number of established technologies:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Granular Activated Carbon (GAC) a the dominant solution<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Reverse osmosis and nanofiltration (RO\/NF) for higher-spec applications<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Ion exchange (IX) a well-established technology, with new PFAS-selective resins continuing to develop<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">This distribution reflects a continued reliance on proven technologies like GAC and IX, while innovation is increasingly focused on improving performance, selectivity, and operational efficiency.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">GAC remains widely used due to its effectiveness and maturity, but it also comes with some operational considerations, including carbon footprint, regeneration requirements, and the logistics of off-site incineration and transport. These factors are driving interest in both alternative treatment approaches and improvements to existing systems.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">At the same time, advances in selective materials and regeneration methods are gaining attention, aiming to reduct lifecycle impacts while maintaining or improving performance.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Alongside this, the scale of the PFAS challenge remains substantial.Estimates suggest that less than 1% of PFAS emissions are currently removed annually in Europe, equivalent to only a small fraction of total emissions.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Taken together, this highlights that the gap is not just technical. The challenge is shifting from how we treat PFAS to how to manage PFAS across the water system, including treatment, source control, residual handling, and long-term environmental impact.<\/span><\/p>\n<h3><b>5. The cost conversation is shifting &#8211; fast<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Long-term cost projections are starting to reshape decision-making.<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Health-related costs linked to PFAS exposure in Europe could reach \u20ac438 billion by 2050<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">A more realistic scenario, where emissions continue, pushes total costs toward \u20ac2 trillion over 20 years<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Annual costs escalate sharply when broader PFAS groups are included:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Drinking water: up to \u20ac65 billion per year<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Wastewater and sludge: tens of billions more<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">At the same time, investment in drinking water treatment is increasing, driven largely by tighter regulation. Utilities across Europe are expected to invest billions of euros in PFAS treatment over the coming decade, supported by wider European funding for\u00a0 water resilience, infrastructure and emerging treatment technologies.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">This shifts the conversation from the cost of treatment alone to how investment is balanced across prevention, treatment, and long-term system resilience.<\/span><b><\/b><\/p>\n<h3><b>6. Utilities are starting to think beyond PFAS in isolation<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Utilities are increasingly managing PFAS alongside other system-wide risks.<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">PFAS is typically treated as an acute, localized risk, linked to contamination and public health<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Climate change is a system-wide, chronic risk, affective availability and resilience<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">But that separation is starting to break down, there is a growing recognition that PFAS needs to be addressed within a broader water system context, including:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Source control and industrial pathways<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Treatment and disposal implications<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Impacts on water reuse<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Links to wider environmental pressures<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">This aligns with broader sector research priorities, where emerging contaminants and climate resilience are increasingly being addressed together rather than separately.<\/span><\/p>\n<h3><b>7. Accountability is coming, but unevenly<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Enforcement and financial accountability for PFAS contamination are beginning to shift upstream.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Legal and regulatory pressure is increasingly targeting producers rather than leaving utilities to absorb the full cost of treatment and remediation. In several jurisdictions, this is already translating into large-scale settlements and liability claims, alongside legal precedents that support holding polluters accountable for emissions and associated impacts.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">This introduces a potentially significant shift in how PFAS risk is managed and funded.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">However, progress remains uneven, highly dependent on jurisdiction, legal frameworks, and political will.<\/span><\/p>\n<h3><b>The takeaway: PFAS is becoming a system problem, not a technical one<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">The sector is moving beyond seeing PFAS as a treatment challenge.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">It is increasingly understood as:\u00a0<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">A definition problem (what qualifies as PFAS)<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">A measurement problem (what is practical and meaningful to monitor)<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">A regulatory problem (how frameworks evolve)<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">A system problem (how it connects to wider water management challenges)<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">In practice, leading approaches are starting to converge around:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Prioritised monitoring, focusing on representing PFAS groups rather than exhaustive testing<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Risk-based decision making, aligning investment with known exposure and regulatory direction<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Integration into wider system planning, particularly where PFAS intersects with reuse, residuals management, and long-term resilience.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Those who move early to align monitoring, regulation, and system planning will be better positioned, not just to respond to PFAS, but to manage the broader shift toward more complex and less defined water quality risks.<\/span><\/p>\n<p><a href=\"https:\/\/www.waterworld.com\/drinking-water-treatment\/pfas\/news\/55369185\/study-finds-pfas-levels-declining-in-new-jersey-drinking-water\">Learn more in this article.<\/a><\/p>\n<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/section>","protected":false},"excerpt":{"rendered":"<p>PFAS in water is shifting from a treatment issue to a system-level challenge, reshaping regulation, monitoring and utility decision-making.<\/p>","protected":false},"author":28,"featured_media":17537,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":"","_members_access_role":[],"_members_access_error":""},"categories":[70],"tags":[],"class_list":["post-17535","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry-insights-and-trends"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>PFAS in Water: The Shift from Treatment to System-Level Management | Isle Utilities<\/title>\n<meta name=\"description\" content=\"PFAS in water is shifting from a treatment issue to a system-level challenge, reshaping regulation, monitoring and utility decision-making.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" 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