Summer 2026 left roughly 38% of Europe's land in drought, one of the most severe heat and drought events the continent has recorded. In southern Europe about 30% of the population lives under permanent water stress, and up to 70% faces seasonal summer stress. Against that backdrop Europe still reuses only about 3% of its treated wastewater, close to 1.1 billion cubic metres a year, when the volume technically available for reuse runs several times higher. Regulation (EU) 2020/741 turned reuse from an option into a governed market, and its first hard reporting deadline fell on 26 June 2026. For investors in water infrastructure, the distance between 3% reused today and the roughly 6.6 billion cubic metres the European Commission estimated as reachable is the shape of the opportunity.
The 2026 drought and the demand it created
The physical numbers set the demand. Summer 2026 ranked among Europe's worst heat and drought episodes, with roughly 38% of the land in drought and Mediterranean states from Spain and Portugal to Italy, Greece, Malta and Cyprus under the sharpest seasonal freshwater pressure. The distribution side compounds it: in Italy more than 42% of the water put into local networks is lost before it reaches a tap, according to ISTAT, a leakage rate that turns every new source into a partly wasted investment until networks are fixed. The European Economic and Social Committee has put the bill for meeting existing EU water legislation at least 255 billion euros, and even after the recent public commitments a persistent annual shortfall of around 23 billion euros remains. Scarcity of this scale changes the economics of alternative supply. Desalination and treated-wastewater reuse stop being marginal add-ons and become base-load sources that municipalities and agriculture will pay for, which is precisely the condition under which private capital underwrites long-dated water assets.
Regulation (EU) 2020/741 and the money behind the strategy
Regulation (EU) 2020/741 on minimum requirements for water reuse took effect on 26 June 2023 and set common quality classes, monitoring rules and risk-management duties for reclaimed water used in agricultural irrigation. Its first governance milestone arrived on 26 June 2026, the date by which member states using reclaimed water had to publish datasets on compliance checks, to be refreshed every six years. That reporting obligation matters to investors because it converts reuse from a voluntary practice into a documented, auditable activity with a public compliance record, the kind of framework lenders and infrastructure funds require before committing. Layered on top is the European Water Resilience Strategy, published on 4 June 2025, which the Commission paired with an EIB Group Water Resilience Programme of more than 15 billion euros in financing for 2025 to 2027, intended to mobilise around 40 billion euros of water investment over three years. National rules point the same way: Italy's Drought Decree (Law No. 68/2023) streamlined authorisations for desalination plants and wastewater reuse, and the Green Deal target of cutting EU water use by 13% by 2030 keeps demand for efficiency and alternative supply on the policy agenda.
From 3% to 6.6 billion cubic metres: the size of the gap
The gap is the investment thesis. Europe currently reuses close to 1.1 billion cubic metres of treated wastewater a year, about 2.4% to 3% of effluent, while the European Commission's own impact assessment put the technically reachable figure at roughly 6.6 billion cubic metres, more than half the volume leaving EU treatment plants, for an incremental cost it estimated below 700 million euros. The distribution of practice is uneven and instructive. Cyprus already reuses close to 100% of its wastewater and Spain moves the largest absolute volumes in Europe, mostly for irrigation, whereas Malta sits at 5% to 10% and Italy reuses a small fraction despite ranking among the most drought-exposed economies on the continent. That unevenness is where returns live, because the laggards carry the steepest growth curve once regulation and drought force the issue. The equipment layer tracks the same trend: Europe's water and wastewater treatment equipment market was valued near 18.6 billion dollars in 2025 and is projected to reach roughly 26.9 billion dollars by 2034, a durable tailwind for the technology suppliers, EPC contractors and asset owners positioned in reuse and desalination.
Where the capital is already moving
Capital is already repricing these assets. The clearest 2026 signal is Abu Dhabi's TAQA agreeing to buy Spain's GS Inima for about 1.2 billion dollars, a deal expected to close in 2026 that brings more than 50 active desalination and water-treatment projects across ten countries into a single platform. Spain's Aqualia, held by FCC and the infrastructure investor IFM Investors, refinanced roughly 1.46 billion dollars through two bond issues of about 582 million and 873 million dollars and renewed major municipal contracts in Ibiza, Vigo, Salamanca and Jaen, the long-concession cash flows that anchor infrastructure portfolios. Project pipelines confirm the direction: GS Inima reached financial close on Oman's Ghubrah III desalination plant and, with Aquapor, won the Algarve desalination contract in Portugal. Sector M&A stayed active through 2025 at 159 disclosed water deals priced around 10.8 times EBITDA, a multiple that reflects the scarcity premium buyers now attach to contracted water supply. For an investor, reuse and desalination combine regulated or concession-backed revenue with a demand driver, drought, that is intensifying rather than fading.