US federal bill proposes $10bn fund for PFAS removal from water systems

A bipartisan bill introduced in the US House of Representatives proposes $10bn in new federal spending to help water utilities remove per- and polyfluoroalkyl substances — PFAS, often called “forever chemicals” — from drinking water supplies. The Protect Clean Water Act would authorise $2bn annually over five years, extending federal support for contaminant removal and broader water infrastructure upgrades.

The legislation arrives as regulators on both sides of the Atlantic tighten standards for PFAS in drinking water, and as water companies face steep capital costs to install advanced treatment technology. For London readers — planners, water engineers, environmental health officers and anyone tracking contamination risk in the Thames basin — the US funding model offers a reference point for how governments might share the cost of removing persistent synthetic chemicals that conventional treatment plants were never designed to handle.

What the bill proposes

The Protect Clean Water Act would create a dedicated grant programme administered by the Environmental Protection Agency, with $2bn available each fiscal year through to 2031. Eligible recipients include public water systems, tribal water systems and disadvantaged communities. The funds could be used for capital projects — installing granular activated carbon, ion exchange or reverse osmosis systems — as well as for pilot testing, engineering design and related source-water protection measures.

The bill is bipartisan, with lead sponsors from both parties, signalling that PFAS remediation has moved beyond partisan environmental debate into the realm of infrastructure obligation. The legislation does not set new drinking water limits itself; those are already being advanced through the EPA’s separate regulatory process, which in 2024 finalised legally enforceable maximum contaminant levels for six PFAS compounds. The proposed funding is the implementation arm: compliance requires money, and small and medium-sized utilities have warned that without federal support, the cost will fall entirely on ratepayers.

Why PFAS matters for water infrastructure

PFAS are a class of thousands of synthetic chemicals used since the 1940s in non-stick coatings, firefighting foams, waterproof textiles, food packaging and industrial processes. They are extraordinarily persistent in the environment and in the human body, earning the “forever chemicals” label. Epidemiological studies have linked long-term exposure to certain PFAS with thyroid disease, liver damage, reduced immune response, low birth weight and some cancers.

Conventional drinking water treatment — coagulation, sedimentation, filtration and chlorination — does not remove PFAS effectively. Removing them requires advanced processes that are capital-intensive to install and energy-intensive to operate. For a mid-sized utility, adding granular activated carbon contactors can cost tens of millions of pounds; for a large metropolitan system, the bill runs into the hundreds of millions.

The US approach matters to London because the scientific and engineering challenge is the same. The Thames, like many major rivers, receives treated wastewater effluent, urban runoff and legacy industrial discharges that can carry PFAS. Drinking water treatment works drawing from the Thames and Lee catchments face the same fundamental question: how to pay for upgrades that address contaminants regulated only recently or not yet fully.

Key facts

The London and UK context

The UK does not yet have statutory maximum contaminant levels for PFAS in drinking water equivalent to the new US standards. The Drinking Water Inspectorate requires water companies to monitor for a set of PFAS compounds and report results, operating under a risk-based approach. Current guidance sets a tiered framework: a low-level screening value and a higher action level that triggers consultation with health authorities.

Thames Water and other UK water companies have been testing for PFAS at treatment works and in raw water sources. Results published through the DWI show detections at a number of sites, generally below the current action thresholds, but monitoring coverage is expanding and the regulatory direction of travel points toward tighter limits. The EU’s revised Drinking Water Directive, which the UK has not adopted but which influences domestic thinking, sets a limit of 0.1 micrograms per litre for a sum of 20 specified PFAS — a standard that would require advanced treatment at some works.

What the US bill highlights is the funding gap. Regulation without a funding mechanism transfers the cost to water bills. In England and Wales, water charges are already rising to cover sewage overflow reduction, leakage repair and climate resilience investment. Adding PFAS treatment without central government grant support would place further upward pressure on household bills, a politically sensitive issue after recent public debate about water company performance and affordability.

Monitoring and source control

One lesson from the US experience is that treatment alone is the most expensive way to address PFAS. The EPA and state regulators increasingly emphasise source control: restricting PFAS discharges at industrial sites, airports and firefighting training grounds before the chemicals reach drinking water intakes. The Department for Environment, Food and Rural Affairs has been working with the Environment Agency on a UK REACH restriction covering PFAS in firefighting foams and is participating in broader European work toward a group restriction on PFAS in consumer and industrial products.

For London, source control means looking upstream at sites in the Thames catchment with a history of PFAS use — airports, chemical manufacturing, waste disposal sites and locations where aqueous film-forming foam has been used for firefighting. The Environment Agency’s groundwater and surface-water monitoring programmes provide baseline data, but identifying and mitigating legacy sources is slow, technically challenging work that often requires cooperation from private landowners.

What water professionals and planners should watch

The Protect Clean Water Act, even if enacted, would apply only in the United States. Its significance for UK readers lies in the precedent it sets for dedicated central-government funding of emerging contaminant removal, the types of treatment technologies it would finance, and the political coalition that made a $10bn authorisation possible in a fiscally constrained environment.

Several practical questions follow for London and UK water planning. First, whether the next water industry price review — PR29, covering 2030-2035 — will include specific PFAS treatment investment lines, and whether Ofwat signals willingness to allow cost recovery for advanced treatment ahead of formal regulatory limits. Second, whether Defra and the DWI move toward statutory maximum contaminant levels aligned with EU or US standards, which would trigger capital programmes. Third, whether the Treasury considers a dedicated grant scheme for PFAS remediation, analogous to the US model, or leaves the cost with water companies and their customers.

The US bill also underscores that PFAS is not solely an environmental health story. It is an infrastructure delivery story, a utility finance story and a planning story. Treatment works need land, planning permission and grid connections. Advanced treatment generates concentrated PFAS waste streams that themselves require disposal, raising questions about incineration, landfill and regeneration of spent filtration media — all matters that intersect with local planning authorities and environmental permitting.

What the bill does not yet address

The legislation authorises funding but does not appropriate it; a separate congressional appropriations process would determine actual spending levels each year. The bill does not resolve technical debates about which treatment technologies are most cost-effective at scale, nor does it settle questions about disposal of PFAS-laden filter media and brine concentrates. And it does not address private wells, which serve roughly 15 percent of the US population and fall outside the regulated public water system framework.

For London readers, the comparable gap is private water supplies — small supplies serving individual properties or small communities, which exist in outer London and the wider South East and which are less systematically monitored than large public supplies. Any future UK PFAS strategy would need to account for these supplies, likely through a combination of local authority environmental health powers and catchment-based approaches.

Source: Smart Cities Dive, “$10B for PFAS removal proposed in bipartisan House bill,” 26 October 2026, https://www.smartcitiesdive.com/news/10b-for-pfas-removal-proposed-in-bipartisan-house-bill/872749/