Desalination System - Market Share Analysis, Industry Trends & Statistics, Growth Forecasts (2026 - 2031)

According to Mordor Intelligence, the desalination system market size is projected to expand from USD 18.02 billion in 2025 and USD 19.61 billion in 2026 to USD 29.92 billion by 2031, registering a CAGR of 8.82% between 2026 to 2031.

This report is Segmented by Technology of Separation (Membrane Technology and Thermal Technology), Application (Municipal and Industrial), and Geography (Asia-Pacific, North America, Europe, South America, and Middle-East and Africa). The Market Forecasts are Provided in Terms of Value (USD).

Global Desalination System Market Trends and Insights

Rapid Municipal Water Demand in MENA Region

Per-capita renewable freshwater in Gulf Cooperation Council states fell below 100 m3 per year, less than 10% of the global scarcity benchmark. Saudi Arabia targets 8.5 million m3 /day of new RO capacity by 2030, a 60% jump over 2025 output. Egypt let contracts for three plants totaling 1.5 million m3 /day in 2025 to secure Suez Canal corridor growth. Algeria budgeted USD 4.2 billion for coastal desalination through 2028 to offset 40% distribution losses. Commissioning ramps in 2026-2027, adding 2.1 percentage points to baseline CAGR as network effects spur follow-on phases.

Industrial Reuse Mandates (Semiconductor, Pharma)

Zero-liquid-discharge rules require fabs to recycle at least 90% of process water in Taiwan and 95% in India. Taiwan's 2024 rule changes accelerated on-site RO retrofits that now treat brackish groundwater and reclaimed effluent. South Korea subsidizes up to 40% of desalination capex for industrial plants above 5,000 m3 /day, boosting pharma API adoption. Compliance deadlines cluster in 2026-2027, lifting CAGR by 1.8 points.

RO Membrane Fouling and Scaling

Organic fouling cuts permeate flux up to 35% within 18 months at high-throughput Gulf plants. Rising sea-surface temperatures extend algal bloom seasons by 6-8 weeks, raising total organic carbon 25%. Biofilm-forming microbes resist chlorine pretreatment; incidents rose 22% year-on-year. Scaling in high-recovery systems shortens membrane life to 4.5 years. Countermeasures add USD 0.12-0.20 /m3 to opex, shaving 0.9 points off CAGR until fouling-resistant membranes commercialize.

Other drivers and restraints analyzed in the detailed report include:

1. Falling RO CAPEX and Energy-Recovery Costs
2. Green-Hydrogen Cluster Demand (Coastal Deserts)
3. Environmental Impact of Brine Discharge

For complete list of drivers and restraints, kindly check the Table Of Contents.

Segment Analysis

Membrane processes captured 78.45% of desalination system market share in 2025 and are projected to grow at a 10.55% CAGR through 2031. The desalination system market size for membrane technologies is set to outpace thermal methods as RO energy intensity falls below 2.5 kWh /m3 and energy-recovery devices approach 98% efficiency. Electrodialysis reversal (EDR) is gaining ground in inland brackish-water applications where total dissolved solids remain under 5,000 mg/L, cutting energy consumption compared with high-pressure RO. Hybrid MED-RO plants handle RO reject streams, pushing overall recovery above 70% while holding costs within 8% of pure RO configurations. Thermal multi-stage flash and multi-effect distillation decline except where power-plant waste heat is free, yet selective Gulf projects still move forward under co-generation economics.

Thermal technologies, although losing share, remain vital in Kuwait and UAE where existing infrastructure and fuel subsidies offset higher energy intensity. Vapor-compression units persist on offshore platforms that prize compactness over cost. Nanofiltration, ultrafiltration, and microfiltration increasingly serve as pretreatment buffers that extend RO membrane life by up to 35% in turbid waters such as the Yangtze Delta. Component partnerships dominate procurement strategy: membrane suppliers license chemistry to regional fabricators, while energy-recovery OEMs sign performance-based contracts indexed to kWh/m3 metrics, embedding devices into competitor plants.

Complete Report Scope:

• By Technology of Separation
  • Membrane Technology
    • Electrodialysis (ED)
    • Electrodialysis Reversal (EDR)
    • Reverse Osmosis (RO)
    • Other Membrane Technologies (Nanofiltration, Ultrafiltration, Microfiltration)
  • Thermal Technology
    • Multi-stage Flash Distillation (MSF)
    • Multi-effect Distillation (MED)
    • Vapor Compression Distillation
• By Application
  • Municipal
  • Industrial
• By Geography
  • Asia-Pacific
    • China
    • India
    • Japan
    • Rest of Asia-Pacific
  • North America
    • United States
    • Canada
    • Mexico
  • Europe
    • Germany
    • United Kingdom
    • Spain
    • Rest of Europe
  • South America
    • Brazil
    • Chile
    • Rest of South America
  • Middle-East and Africa
    • Saudi Arabia
    • United Arab Emirates
    • Algeria
    • Egypt
    • Rest of Middle-East and Africa

Geography Analysis

The Middle-East and Africa commanded 52.70% of the desalination system market share in 2025 and is projected to grow at a 10.46% CAGR to 2031, buoyed by Saudi Arabia's USD 200 billion National Water Strategy and Egypt's Suez Canal corridor build-out. ACWA Power's 2.4 million m3 /day Yanbu plant, scheduled for 2028 at USD 0.42 /m3 tariff, illustrates economies of scale. UAE's Taweelah complex reached 909,000 m3 /day in 2025 and plans another 200,000 m3 /day by 2027. Algeria's ADE financed 450,000 m3 /day through the African Development Bank, underscoring MDB-sovereign collaboration.

In Asia-Pacific, India cleared five projects totaling 600,000 m3 /day in Gujarat alone during 2025 to meet zero-discharge mandates for electronics hubs. China's Tianjin complex scales to 500,000 m3 /day by 2026 to backstop groundwater deficits in the North China Plain. Japan invests USD 450 million in volcanic-heat MED pilots across Okinawa and Kyushu. The desalination system market size in Asia-Pacific benefits from industrial clusters tethered to coastal corridors.

North America and Europe move cautiously under stricter environmental scrutiny. California's Huntington Beach plant gained conditional clearance in 2025 after a USD 120 million marine-habitat package. Spain's 200,000 m3 /day Almeria plant embeds zero-liquid-discharge brine concentrators. South America's growth centers on Chile's mining belt, where 400,000 m3 /day of incremental capacity cuts Andean aquifer withdrawals 30% by 2031. Brazil's Fortaleza feasibility study targets 150,000 m3 /day by 2028 to hedge multi-year droughts.

1. ACCIONA
2. Aquatech
3. Biwater Holdings Limited
4. Doosan Enerbility
5. DuPont
6. Energy Recovery Inc.
7. Fisia Italimpianti
8. Fluence Corporation Limited
9. IDE Technologies
10. Kanadevia Corporation
11. Metito Utilities
12. Ocean Oasis
13. Toray Industries, Inc.
14. Veolia
15. Wabag
16. Xylem

Additional Benefits:

• The market estimate (ME) sheet in Excel format
• 3 months of analyst support