đThe New Water Markets: Selling and Buying Reliability Where Water is Running Dry
Identifying the fastest-moving markets willing to pay for water certainty.
Special thanks to GigaClimate Advisor and our A&R Series author, Chris Mangieri
90% of Israelâs treated wastewater is used for irrigation
đ§Demand for Water Certainty
Water used to be one of the most dependable parts of modern life in most of the developed world. Utilities sourced it, treated it, and delivered it on demand, while rural homes and farms drilled wells into seemingly bottomless aquifers. But the systems built for that world â stable seasons, predictable rainfall, abundant groundwater and surface water â no longer match the climate we live in now. Droughts are more severe, floods are more violent, aquifers are collapsing, and infrastructure is aging into failure. With the marginal cost of water on the rise, the assumption that water will always be readily available is beginning to break down.
In its place, a different landscape is emerging, one where access to water is actively managed, traded, and increasingly produced outside traditional utilities or wells. Farmers in the US are turning to groundwater trading to survive tightening supplies. American and European cities are adopting reuse systems to stretch stressed systems. Data centers, chip manufacturers, and industrial campuses are building their own behind-the-fence water systems to guarantee uptime. Reliability and certainty have become the product, and when this happens, markets form beyond the basic commodity.
This piece maps where those markets are forming across agriculture, cities, and industry, and where founders can build real businesses inside these evolving water markets.
đ§âđž Agriculture: The First Market to Feel Scarcity
Agriculture accounts for 70% of global freshwater withdrawals and 47% of all withdrawals in the US, making it the first sector where scarcity becomes widespread economic pain. Western US farmers have already shifted away from gravity-fed irrigation to more reliable and precise pressurized irrigation systems - over 74% of all irrigated cropland acres in 17 Western states use pressurized systems vs 37% in 1984. Yet climate volatility continues to drive losses: drought alone has inflicted $3.26 trillion in global agricultural damages over the last three decades (4% of global agriculture GDP).
This level of exposure forces growers to look beyond traditional supply, opening the door to a new ecosystem of companies and counterparties selling water, tools, and reliability.
Whoâs Supplying to Agriculture?
The suppliersâ landscape is diversifying quickly:
Utilities, especially in Israel, Spain, and Australia, supply recycled wastewater to farmers. 90% of Israelâs treated wastewater is used for irrigation.
Farmers themselves are becoming water sellers through groundwater credits, conserved water, and fallowing contracts (leaving the ground unseeded to recover) â trading markets in California range from $1 to $2,200 per acre-foot depending on drought conditions.
Precision irrigation and automation platforms, like WiseConn and Lumo, provide sensor-driven irrigation scheduling and smart value control.
Emerging water treatment providers such as Gradiant are deploying on-farm, high-recovery desalination units that turn brackish groundwater into a productive supply.
Hyperscalers are co-investing with farmers to upgrade their irrigation systems, enabling big tech to claim the water reduction toward their sustainability goals.
As growers search for new sources and new tools, and as utilities, farmers, and private companies step in to supply them, agriculture is becoming the frontline of water-market innovation.
Where Agriculture Markets are Emerging
New agricultural water markets are emerging across many developed regions. Californiaâs Sustainable Groundwater Management Act is reshaping how growers manage groundwater in a state that relies on aquifers for up to 60% of its water supply during drought years. Australiaâs Murray-Darling Basin â home to roughly 40% of the nationâs agricultural production and valued at $30.4 billion â operates one of the worldâs most advanced and liquid water markets, with trading volumes now in the billions annually. For context, the Murray-Darling Basin is 2.5x the size of California, and California produces 11% of the USâs agricultural value. In Catalonia, Spain, drought-driven cuts of up to 80% to irrigation in 2024 are accelerating demand for reclaimed water.
Across these regions, novel business models consistently gain traction because they deliver what growers value most: reliability, compliance, and predictable outcomes.
What Business Models are Scaling and Whoâs Buying
Irrigation-as-a-service, where companies operate precision irrigation systems tied to yield or water-savings outcomes.
Soil-, drone-, and satellite-based sensing systems, operationalizing real-time data into actionable on-farm insights to improve efficiencies.
Modular on-farm brackish treatment that lowers irrigation costs to $1 to $2 per 1,000 gallons compared to imported water.
Water accounting and trading tools that help growers navigate basin-specific rules.
Buyers include large specialty crop growers, high-value vegetable producers, growers with variable soils and/or uneven irrigation, farmers relying on aging wells with rising salinity, and farm lenders and insurers.
Founder Takeaway
Farmers donât buy sustainability; they buy yield stability. The fastest path to adoption is offering products that integrate seamlessly into irrigation workflows and plug directly into emerging water markets. Per our Food & Ag series, the âgrowerâ market can be fragmented and challenging to scale at pace. Consider targeting co-ops and aggregated farmer networks with a high willingness and ability to pay for a quicker pathway to scaling.
đď¸ Cities: The Fastest-Growing Market for New Water
Urban water stress is already shaping development patterns in North America, Europe, and Australia. As of 2019, among global cities with over 3 million people, 33 of the roughly 170 â population of over 255 million â face extremely high water stress. By 2030, that pool is expected to expand to 45 cities, home to nearly 470 million people. The US loses 14% to 18% (trillions of gallons) per year to leaks, Italy loses 35% on average (Potenza, IT loses 70% â population 63,839) to leaky pipes, and some Canadian cities lose anywhere from 10 to 40%, often because they donât actually know where losses occur. While the dollar cost of this loss may be low today, the economic and human toll when pipes run dry and cities reach day zero is catastrophic.
As a result, new development â housing, industrial, commercial â increasingly depends on supplemental supply, reuse, and leakage reduction.
Whoâs Supplying to Cities?
Demand is driving both large capital projects and modular, private solutions, as the one-size-fits-all utility scale model no longer reigns supreme.
On-site reuse operators, like Epic Cleantec, provide building- and district-scale reuse of up to 95% of a buildingâs wastewater.
Leak detection and network-intelligence companies, such as FIDO Tech and Kentyou, reduce non-revenue water at the energy-water nexus.
In-situ water infrastructure hardening and repair, as offered by companies like SippTech, reduces both the time and cost of replacement for large assets buried in complex urban environments.
Direct potable reuse (DPR) project buildouts by city water municipalities, led by recent California water treatment regulations that have had a broad market impact, similar to how California drove vehicle tailpipe emission standards across the US.
The regions adopting these solutions the fastest are those that already treat water reliability as a requirement for continued growth.
Where New Urban Markets Are Emerging
New urban water markets are emerging wherever growth runs up against supply limits. In the US Southwest, cities like Phoenix, AZ, recycle 98% of their wastewater, and Las Vegas, NV, recycles 99% of its indoor water use. California recently extended its Title 22 water reuse regulations, resulting in a gold rush of new DPR projects, while El Paso Water (a Texas water municipality) plans for a new large-scale DPR facility. In Canada, Calgary is expanding its leak detection and pipe replacement programs to stretch aging systems. Across the EU, Spain reuses 350 to 400 million mÂł annually (12% of their water consumption), and France recently authorized nationwide potable reuse to scale from 1% to 10% by 2030. In Australia, Perth is scaling its groundwater replenishment program, having reached 100 billion liters recharged; they aim for 35% wastewater recycling by 2035.
Urban areas in the US, EU, South Korea, and Israel with populations bigger than 3 million that have high to extremely high levels of water stress include: Phoenix-Mesa, US; Madrid, Spain; Tel Aviv-Jaffa, Israel; Los Angeles, US; Barcelona, Spain; Dallas-Fort Worth, US; Seoul, South Korea; and London, United Kingdom.
These emerging hotspots reveal a clear pattern: the models that scale are the ones that bypass bottlenecks and long sales cycles to deliver reliability immediately.
What Business Models are Scaling and Whoâs Buying
Reuse-as-a-service for buildings and districts.
Pay-for-performance leakage reduction.
Water-neutral development, allowing new construction without utility upgrades.
Stormwater-as-a-service, combining retention and tradable credits.
Buyers include large city campuses (commercial, universities, etc.), developers and commercial builders in high water stress cities, and cities with stormwater credit markets (Washington, DC).
Founder Takeaway
Municipalities are slow, but the edge nodes that depend on them â developers, campuses, hospitals, universities â move fast and have clearer ROI. Founders should build solutions that avoid permitting friction, reduce dependence on centralized utility upgrades, and focus on private organizations operating within city boundaries.
đ Industry: Where Water Risk Meets Operational Risk
Industry is emerging as the fastest-moving water market because water failures translate directly into downtime. Industrial users account for 19% of global freshwater withdrawals, but unlike other sectors, they can also require extreme water purity, making them the only segment where water is already expensive and engineered. That combination of high volume, high purity, and high stakes creates exceptional willingness to pay for reliability. A single hyperscale data center can consume 200 million gallons per year, and outages cost $540,000 per hour. Chip manufacturers require 2 to 4 million gallons per day of ultra-pure water â equivalent to a small city â and downtime costs $1 million per hour.
With the most to lose, the most cash on the table, and the highest performance requirements, industry is becoming the strongest early adopter of new water technologies.
Whoâs Supplying to Industry?
Industrial reverse osmosis (RO) and high-purity water systems from companies like Salinity Solutions and Applied Membranes, that deliver high-recovery reverse osmosis and polishing systems.
Large incumbents, like Xylem and Siemens, who are delivering end-to-end industrial water systems and are major acquirers of other firms in the space.
Treatment-as-a-service, like Axine Water, for industrial clients to remove pharmaceutical compounds, solvents, and surfactants.
Zero-liquid discharge and resource recovery companies, like Gradient, who can recover valuable minerals from waste streams.
Atmospheric water harvesters, such as WAVR Technologies, who are building high-efficiency and high-output systems to reliably generate pure water where itâs needed most.
These vendors are finding the strongest demand in regions where industrial growth is running headfirst into water constraints.
Where New Industry Markets Are Emerging
Industrial water markets are accelerating wherever high-tech growth meets constrained supplies. In the US and Canada, industrial water spend is projected to rise 28% by 2030, driven by water-intensive data centers and semiconductor fabs in hotspots like Arizona, Texas, Ohio, Toronto, and MontrĂŠal. Across the EU and Australia, strict cooling and efficiency rules for data centers and mining districts are pushing operators toward reuse, high-recovery treatment, and closed-loop systems.
Across these regions, a clear pattern emerges: the models that gain traction are the ones that deliver new supply without waiting for new infrastructure.
What Business Models are Scaling and Whoâs Buying
High recovery RO, breaking through the old limit of membrane-based water recovery.
Compliance-as-a-service for PFAS, nutrients, and emerging contaminants.
Modular industrial treatment, deployable in months, not years.
Closed-loop cooling that cuts water use by up to 95%.
Chemical-free treatment utilizing UV, ozone, or bio-based systems.
Digital water twin and predictive maintenance platforms to improve reliability.
Buyers include large chip, industrial, and pharmaceutical manufacturers, hyperscalers, mining operations, beverage and food processors, and chemical plants.
Founder Takeaway
Industry pays the most and moves the fastest. Donât sell water â sell uptime, ROI, and risk mitigation.
âď¸ Where Builders Should Focus
Water markets are emerging fastest where scarcity already shapes budgets â the US Southwest, Texas, Californiaâs SGMA basins, Southern Europe, Australiaâs irrigation districts, and the Canadian Prairies. These are some of the geographies where water constraints drive water procurement.
Founders should prioritize reliability over sustainability since water failures affect bottom lines:
Industry: Chip fabrication downtime costs $1 million per hour, while data center downtime costs $540,000 per hour.
Agriculture: Costs can be an entire seasonâs revenue.
Cities: Some city building permits require water reuse and conservation.
The most immediate solutions are modular, distributed, and deployable in months, not years. The fastest adopters arenât utilities with long sales cycles; theyâre developers, data centers, industrial campuses, and processors. Wastewater remains one of the largest untapped supplies in developed markets, with tens of billions of gallons produced each day. Yet some of these new markets work without measurement, verification, crediting, and trading tools that turn scarcity into functional markets.
Build for reliability where downtime is expensive, deploy fast, start at the edge, unlock wastewater, and enable markets.
đ Water Markets as Adaptation Markets
Water markets are forming because the climate and overuse are forcing them. Agriculture, cities, and industry are no longer passive water users; theyâre buyers of reliability, paying for certainty instead of assuming abundance. As scarcity deepens, these markets will accelerate.
At GigaClimate, we view this shift as more than an adaptation and resilience narrative â itâs a roadmap for building. The next generation of water companies will be modular, distributed, data-enabled, and designed for reliability at the edge. Our focus is on founders creating new water locally, hardening existing water assets, unlocking wastewater as a supply, and building the data and trading infrastructure that makes these markets function.
Next week, weâll dive into the intelligence layer beneath these markets: the sensing, analytics, and automation systems that turn water from a static resource into a real-time, dynamic network.