Case study: Water security & desalination — a startup-to-enterprise scale story

Global desalination capacity surpassed 130 million cubic meters per day in 2025, yet fewer than 15% of water technology startups that raised Series A funding between 2017 and 2023 successfully scaled to enterprise-level operations serving more than 50 municipal or industrial clients (Global Water Intelligence, 2025). This case study traces how three water security and desalination startups navigated the journey from pilot installations to enterprise-scale deployments across the Asia-Pacific region, revealing the funding milestones, technical pivots, and procurement strategies that separated the companies that scaled from the many that plateaued.

Why It Matters

Water stress affects more than 2 billion people globally, and the World Resources Institute projects that by 2030, 17 countries in the Asia-Pacific region will face extremely high water stress, including India, Pakistan, and parts of China and Australia (WRI, 2025). Traditional centralized desalination plants require $500 million to $2 billion in capital and 5 to 8 years of development, making them inaccessible for many communities facing near-term water crises. Startups developing modular, energy-efficient desalination and water treatment technologies offer a faster path to deployment, but the journey from a successful pilot to reliable enterprise operations is riddled with technical, financial, and regulatory obstacles.

For engineers evaluating water treatment technologies in the Asia-Pacific region, understanding which solutions can actually scale is essential. The difference between a system that performs well in a 6-month pilot treating 500 cubic meters per day and one that maintains consistent output quality and uptime at 50,000 cubic meters per day directly affects water utility reliability, public health outcomes, and infrastructure investment decisions. The startups profiled here provide concrete lessons on what enterprise-ready water security infrastructure looks like across diverse operating conditions.

Key Concepts

Specific energy consumption (SEC) measures the energy required to produce one cubic meter of desalinated water. Conventional seawater reverse osmosis (SWRO) plants operate at 3.0 to 4.5 kWh per cubic meter, while startups are targeting SEC below 2.5 kWh per cubic meter through advances in membrane materials, energy recovery devices, and system design. Lower SEC directly reduces operating costs and enables integration with renewable energy sources.

Modular desalination refers to containerized or skid-mounted water treatment systems that can be deployed in units of 100 to 5,000 cubic meters per day, scaled by adding parallel units rather than building larger single-train plants. This approach reduces upfront capital requirements and allows capacity to track demand growth, but introduces challenges in maintaining consistent water quality across multiple parallel treatment trains.

Brine management encompasses the treatment, disposal, or beneficial use of the concentrated salt stream produced during desalination. Conventional SWRO plants reject 40 to 50% of intake water as brine, creating environmental concerns in marine and inland applications. Zero liquid discharge (ZLD) and minimal liquid discharge (MLD) systems reduce brine volumes but add 30 to 60% to capital costs and 20 to 40% to energy consumption.

Water-as-a-service (WaaS) is a business model in which a technology provider finances, builds, owns, and operates a water treatment facility, selling treated water to a customer under a long-term contract at a per-cubic-meter rate. This model shifts capital risk from the water utility or industrial customer to the technology provider and its financial backers, but requires the provider to secure project finance and maintain operational performance over contract periods of 10 to 25 years.

What's Working

Gradiant: From MIT Lab to Global Industrial Water Platform

Gradiant, founded in 2013 by MIT researchers in Singapore, developed a proprietary counterflow reverse osmosis (CFRO) technology that achieves freshwater recovery rates of 90 to 98%, compared with 40 to 60% for conventional SWRO. The company's trajectory from laboratory innovation to enterprise-scale deployment illustrates the critical role of industrial customers in funding early growth. Rather than pursuing municipal desalination contracts that required lengthy procurement cycles and political approvals, Gradiant targeted semiconductor fabricators, pharmaceutical manufacturers, and petrochemical plants in Singapore, China, and India, where ultrapure water demand was growing at 12 to 18% annually and customers could make purchasing decisions within 3 to 6 months (Gradiant, 2025).

By 2020, Gradiant had deployed 15 industrial water treatment systems across Asia-Pacific with capacities ranging from 500 to 8,000 cubic meters per day. The company's Series C round of $225 million in 2022, led by Warburg Pincus, valued the company at over $1 billion and funded expansion into municipal and utility-scale projects. By Q4 2025, Gradiant operated more than 100 installations across 15 countries, processing a combined 4 million cubic meters per day. The company's annual revenue exceeded $500 million, with approximately 55% from recurring WaaS contracts and 45% from equipment sales and engineering services (Gradiant, 2025).

The critical scaling lesson from Gradiant was sequencing customer segments strategically. Industrial customers provided faster sales cycles, higher willingness to pay ($2.50 to $5.00 per cubic meter versus $0.80 to $1.50 for municipal), and operational environments where performance data could be collected under controlled conditions. This data then supported credibility when entering the municipal market, where procurement teams required 2 to 5 years of operational performance records before awarding contracts.

Elemental Water Makers: Solar-Powered Desalination Scaling Across Island and Coastal Communities

Elemental Water Makers (EWM), founded in the Netherlands in 2012, developed solar-powered reverse osmosis systems designed for off-grid and weak-grid locations. The company's Asia-Pacific expansion, beginning with installations in the Maldives and Indonesia in 2018, demonstrates how modular systems scale in distributed deployment models. EWM's standard unit produces 5 to 50 cubic meters per day from seawater using solar photovoltaic panels directly coupled to RO membranes through a hydraulic pressure exchanger, eliminating the need for battery storage or grid connection.

By 2025, EWM had deployed more than 80 systems across 30 countries, with a concentration in Asia-Pacific island communities, coastal resorts, and small industrial facilities. Total installed capacity exceeded 15,000 cubic meters per day. The company raised a total of $22 million across seed and Series A rounds, supplemented by $8 million in grant funding from the Dutch government, USAID, and the Asian Development Bank (Elemental Water Makers, 2025).

EWM's go-to-market strategy relied on two parallel channels. The first targeted resort and hospitality operators in the Maldives, Philippines, and Indonesia, where desalinated water costs of $3.00 to $6.00 per cubic meter undercut diesel-powered alternatives at $8.00 to $12.00 per cubic meter. The second channel targeted development finance institutions and NGOs funding water access projects in underserved coastal communities. Conversion from initial inquiry to commissioned system averaged 4 to 8 months for hospitality clients and 12 to 18 months for development-funded projects due to additional procurement and impact assessment requirements.

The company addressed maintenance challenges in remote locations by developing a remote monitoring platform that tracks membrane performance, solar panel output, and system pressure in real time across all installations. When anomalies are detected, local technicians, trained through a 2-week certification program, receive step-by-step repair instructions via mobile app. This approach reduced average system downtime from 18 days per year in 2019 to 4 days per year by 2024.

WaterGen: Atmospheric Water Generation Scaling Through Government Partnerships

WaterGen, an Israeli company that entered the Asia-Pacific market in 2019, developed atmospheric water generation (AWG) units that extract drinking water from ambient humidity using a proprietary heat-exchange process. While AWG is not technically desalination, it addresses the same water security challenge in coastal and tropical regions where humidity levels exceed 50%. WaterGen's large-scale GEN-L units produce up to 6,000 liters per day at a specific energy consumption of 0.25 to 0.35 kWh per liter, depending on ambient temperature and humidity (WaterGen, 2025).

WaterGen's scaling strategy in Asia-Pacific relied heavily on government-to-government agreements and diplomatic channels. The company signed memoranda of understanding with the governments of India, Vietnam, and the Philippines between 2019 and 2022, leading to pilot deployments in government buildings, military installations, and disaster relief staging areas. India's deployment, coordinated through the National Institution for Transforming India (NITI Aayog), placed GEN-L units at 12 locations across 5 states by 2024, producing a combined 72,000 liters per day for communities lacking piped water access.

The enterprise-scale transition came through partnerships with beverage companies and commercial building developers. WaterGen signed supply agreements with several Indian real estate developers to install AWG units in new commercial complexes as a supplemental water source, generating revenue of $0.02 to $0.04 per liter with operating costs of $0.008 to $0.015 per liter. By 2025, the company reported more than 150 active installations across Asia-Pacific with combined daily output exceeding 500,000 liters.

What's Not Working

Regulatory fragmentation across Asia-Pacific creates significant barriers for startups attempting to scale regionally. Drinking water quality standards, environmental discharge permits for brine, and utility procurement processes vary substantially between countries and often between states or provinces within countries. Gradiant reported that regulatory compliance documentation for a single installation required an average of 14 months in India, 8 months in Singapore, and 22 months in Indonesia. Startups without dedicated regulatory affairs teams typically underestimate these timelines by 50 to 100%.

Membrane fouling and replacement costs exceed projections for many deployments in tropical Asia-Pacific conditions. High water temperatures (28 to 32 degrees Celsius versus the 15 to 20 degrees Celsius assumed in many system designs), elevated biological activity, and seasonal algal blooms accelerate membrane degradation. EWM reported that membrane replacement intervals in Maldives installations averaged 3.5 years versus the 5-year design life assumed in financial models, increasing per-cubic-meter costs by approximately 12%.

Currency and payment risk undermines WaaS business models in emerging markets. Long-term water purchase agreements denominated in local currencies expose technology providers to exchange rate fluctuations that can erode margins significantly over 10 to 25 year contract periods. Several startups operating in India and Southeast Asia reported that currency depreciation reduced effective dollar-denominated revenue by 8 to 15% between 2022 and 2025, turning profitable projects into marginal ones.

Grid intermittency and power quality complicate desalination operations across much of Asia-Pacific. Voltage fluctuations and unplanned outages damage RO membranes, pumps, and control electronics. Gradiant's installations in India required investment in power conditioning equipment adding 8 to 12% to system capital costs. Off-grid solar systems like EWM's avoid grid quality issues but face output variability that limits production to 6 to 8 hours per day unless battery storage is incorporated, adding $150 to $300 per cubic meter of daily capacity in capital costs.

Brine disposal permitting is tightening across Asia-Pacific, creating uncertainty for both new projects and existing installations. Australia's updated Marine Discharge Guidelines (2024) require brine dispersion modeling and ecological impact assessments that add $200,000 to $500,000 and 6 to 12 months to project timelines. India's Coastal Regulation Zone rules restrict brine discharge within 500 meters of the high-tide line, effectively requiring inland disposal or ZLD for many coastal installations.

Key Players

Established Companies

• Veolia Water Technologies: operates more than 3,000 water treatment facilities globally, including 15 major desalination plants across Asia-Pacific with combined capacity exceeding 2 million cubic meters per day
• SUEZ (now part of Veolia): legacy desalination and industrial water treatment portfolio with significant Asia-Pacific presence in China, Australia, and India
• IDE Technologies: Israeli desalination specialist operating two of the world's largest SWRO plants, with growing Asia-Pacific project development including China and India

Startups

• Gradiant: MIT-spinout developing counterflow reverse osmosis for industrial and municipal water treatment, over 100 installations across 15 countries
• Elemental Water Makers: Dutch startup deploying solar-powered modular desalination for island and off-grid communities across 30 countries
• WaterGen: Israeli atmospheric water generation company with government and commercial partnerships across India, Vietnam, and the Philippines
• Boreal Light: German-Kenyan startup producing solar-powered desalination units for coastal communities in South and Southeast Asia
• Oneka Technologies: Canadian company developing wave-powered desalination buoys with pilot deployments in coastal Asia-Pacific sites

Investors and Funders

• Warburg Pincus: led Gradiant's $225 million Series C round in 2022
• Asian Development Bank: provided concessional financing and technical assistance grants for water security projects across South and Southeast Asia
• Breakthrough Energy Ventures: invested in multiple water technology startups developing energy-efficient desalination and treatment systems

Action Checklist

• Evaluate desalination technology suppliers for specific energy consumption performance across at least 12 months of operation in comparable climate conditions, requesting verified SEC data at ambient temperatures matching project site
• Structure pilot programs as 6 to 12 month evaluations at target capacity rather than reduced-flow demonstrations, ensuring membranes and components are tested under realistic operating stress
• Require suppliers to provide membrane fouling rate data from tropical deployments specifically, rather than accepting specifications based on temperate-climate testing
• Assess brine management compliance requirements in the target jurisdiction before selecting system configuration, building regulatory timeline and disposal cost assumptions into project financial models
• Evaluate WaaS contract structures with attention to currency denomination, inflation adjustment mechanisms, and performance guarantee terms over the full contract duration
• Build redundancy into power supply planning for RO installations, budgeting for power conditioning, backup generation, or battery storage based on local grid reliability data
• Engage with development finance institutions early in project planning to access concessional financing, viability gap funding, and technical assistance that can reduce project risk

FAQ

Q: What is the current cost range for desalinated water from modular systems in Asia-Pacific? A: Modular seawater reverse osmosis systems in the 500 to 5,000 cubic meters per day range produce water at $1.20 to $3.50 per cubic meter in Asia-Pacific, depending on energy source, feed water salinity, and target water quality. Solar-powered off-grid systems operate at the higher end ($2.50 to $6.00 per cubic meter) but avoid fuel costs and grid connection charges. Industrial ultrapure water applications command prices of $3.00 to $8.00 per cubic meter. These costs compare with $0.50 to $1.00 per cubic meter for large-scale conventional SWRO plants processing more than 100,000 cubic meters per day.

Q: How long does it typically take a water technology startup to reach enterprise-scale deployment in Asia-Pacific? A: Based on the trajectories of companies profiled here, water technology startups that achieve a successful pilot (single installation operating for more than 6 months) typically require an additional 4 to 7 years and $30 million to $250 million in capital to reach enterprise-scale operations (more than 50 active installations or more than 50,000 cubic meters per day of combined capacity). Software and monitoring platform startups scale faster, reaching enterprise readiness within 2 to 4 years with capital requirements of $5 million to $20 million. Government partnerships and development finance institution involvement can accelerate timelines by 1 to 2 years by de-risking early deployments.

Q: What certifications and standards should engineers require from desalination equipment suppliers for Asia-Pacific deployments? A: At minimum, require WHO Drinking Water Quality Guidelines compliance for potable water applications, NSF/ANSI 61 certification for components in contact with drinking water, and ISO 9001 quality management certification for the manufacturing facility. For energy performance, request third-party verified SEC testing under ASTM D4516 or equivalent protocols. In Australia, require WaterMark certification for plumbing products. In India, require BIS certification and conformance with IS 10500 drinking water specifications. Supplement certifications with independent commissioning tests at the project site under actual feed water conditions.

Q: How do seasonal variations affect desalination system performance in tropical Asia-Pacific? A: Monsoon seasons significantly affect both feed water quality and system output. During monsoon months, coastal turbidity can increase 5 to 15 times over dry-season levels, requiring enhanced pre-treatment and increasing membrane fouling rates. Conversely, monsoon rainfall can reduce brackish groundwater salinity by 20 to 40% in coastal aquifers, temporarily improving system efficiency. Temperature variations between 24 and 34 degrees Celsius across seasons affect membrane permeability by 15 to 25%, requiring systems to be designed for worst-case summer conditions rather than annual averages. Engineers should specify system capacity based on hot-season performance with pre-treatment designed for monsoon turbidity peaks.

Sources

• Global Water Intelligence. (2025). DesalData: Global Desalination Market Outlook 2025. Oxford: Global Water Intelligence.
• World Resources Institute. (2025). Aqueduct Water Risk Atlas: Asia-Pacific Regional Assessment. Washington, DC: WRI.
• Gradiant Corporation. (2025). Company Profile and Technology Overview: Industrial and Municipal Water Solutions. Singapore: Gradiant Corporation.
• Elemental Water Makers. (2025). Impact Report 2025: Solar-Powered Desalination for Underserved Communities. Amsterdam: Elemental Water Makers BV.
• WaterGen Ltd. (2025). Annual Report 2024: Atmospheric Water Generation Deployment and Performance. Petah Tikva: WaterGen Ltd.
• Asian Development Bank. (2025). Water Security in Asia-Pacific: Technology, Finance, and Governance. Manila: ADB.
• International Desalination Association. (2025). IDA Desalination and Water Reuse Handbook 2025. Topsfield, MA: IDA.