Water and Wastewater Treatment Technologies - Market Share Analysis, Industry Trends & Statistics, Growth Forecasts (2026-2031)

The water and wastewater treatment technologies market size was valued at USD 65.15 billion in 2025 and estimated to grow from USD 69.08 billion in 2026 to reach USD 92.58 billion by 2031, at a CAGR of 6.03% during the forecast period (2026-2031). This report is Segmented by Treatment Type (Oil/Water Separation, Suspended Solids Removal, Dissolved Solids Removal, and More), End-User Industry (Municipal Water and Wastewater Treatment, Food and Beverage, Pulp and Paper, Oil and Gas, Healthcare, and More), and Geography (Asia-Pacific, North America, Europe, South America, and Middle-East and Africa).

Global Water And Wastewater Treatment Technologies Market Trends and Insights

Stricter Zero-Liquid-Discharge Mandates

Heightened enforcement in power, petrochemical, and mining sectors is converting compliance budgets into strategic capital as facilities install integrated thermal evaporation, crystallization, and membrane lines that recover salts and minerals while driving near-zero discharge. Early adopters are leveraging recovered by-products to offset part of their capex, widening the cost gap for laggards that still rely on basic physicochemical treatment. The mandate’s force is greatest in Asia and the Gulf, where new permits increasingly require ZLD readiness as a pre-condition for operation. Investors therefore view ZLD capability as a proxy for long-term license security, pushing equipment backlogs higher across the value chain. Over the medium term these rules are expected to lift the water and wastewater treatment technologies market by roughly 1.8 percentage points of CAGR.

Growth in Decentralized Modular Treatment Plants

Rapid urban sprawl is outstripping the pace at which centralized facilities can be sited and financed, heightening interest in containerized systems that can be delivered in months rather than years. Modular lines allow phased capacity additions that synchronize with real estate development cycles, ensuring utilities avoid stranded investment in oversize assets. The approach lowers entry barriers for small and midsize municipalities that lack access to bond funding for mega-plants, opening new addressable pockets for equipment suppliers. Europe and North America pioneered pilots, but replicability in densely populated Asian corridors is scaling volumes. Over a long-term horizon the trend contributes 1.2 percentage points to growth in the water and wastewater treatment technologies market.

High Total Cost of Ownership for Advanced Membranes

Operational economics, not upfront purchase price, limit uptake of nanofiltration and reverse-osmosis modules. Progressive fouling raises cleaning frequency, shortening useful life and driving recurrent capital outlays that surpass initial equipment cost over a typical 12-year horizon. Compounded by the elevated power draw of 60-bar feed pumps, the hurdle is steepest for small utilities in developing markets that cannot leverage bulk chemical procurement or reliable grid power. As a result, many facilities postpone upgrades or adopt hybrid flowsheets that dilute membrane duty cycles. This structural cost drag is expected to shave 1.1 percentage points from the water and wastewater treatment technologies market’s CAGR.

Other drivers and restraints analyzed in the detailed report include:

• Rising Industrial Reuse Quotas in Water-Stressed Regions
• AI-Enabled Smart Metering and Predictive Maintenance
• PFAS Regulation Uncertainty Delaying Technology Adoption

Segment Analysis

Dissolved-solids removal systems captured 31.02% of water and wastewater treatment technologies market share in 2025 as reverse-osmosis and nanofiltration cemented their place in seawater desalination, brackish water reclamation, and high-recovery industrial lines. The segment’s installed base continues to swell on the back of large municipal desalination projects such as Taiwan’s 100,000 m³/day plant that broke ground in mid-2024.

Yet growth momentum tilts toward biological treatment and nutrient recovery technologies in the Water And Wastewater Treatment Technologies Market, which are forecast to log a 7.04% CAGR by 2031, a full percentage point above the total market average, helped by regulatory incentives that turn recovered phosphorus into a tradable fertilizer credit. At process level, breakthroughs like Fe(III)-triggered partial dissimilatory nitrate reduction coupled with anammox have boosted nitrogen removal beyond 95% while slashing energy demand, decreasing the payback hurdle for municipal biosolids upgrades.

Complete Report Scope:

• By Treatment Type
  • Oil/Water Separation
  • Suspended Solids Removal
  • Dissolved Solids Removal
  • Biological Treatment/Nutrient and Metals Recovery
  • Disinfection/Oxidation
  • Other Types
• By End-user Industry
  • Municipal Water and Wastewater Treatment
  • Food and Beverage
  • Pulp and Paper
  • Oil and Gas
  • Healthcare
  • Poultry and Aquaculture
  • Chemical and Petrochemical
  • Other End-user Industries
• By Geography
  • Asia-Pacific
    • China
    • India
    • Japan
    • South Korea
    • ASEAN
    • Rest of Asia-Pacific
  • North America
    • United States
    • Canada
    • Mexico
  • Europe
    • Germany
    • United Kingdom
    • France
    • Italy
    • Spain
    • Russia
    • Rest of Europe
  • South America
    • Brazil
    • Argentina
    • Rest of South America
  • Middle-East and Africa
    • Saudi Arabia
    • South Africa
    • Rest of Middle-East and Africa

Geography Analysis

Asia-Pacific holds a commanding 34.55% share of 2025 revenue in the Water And Wastewater Treatment Technologies Market and simultaneously records the highest 8.43% CAGR, underscoring a dual leadership seldom observed in mature infrastructure arenas. China continues to commission mega-desalination lines along coastal industrial parks, while Taiwan’s mammoth seawater RO plant highlights how semiconductor clusters dictate municipal water policy.

North America sustains robust replacement outlays tied to aging 1970s-era assets and advanced regulatory frameworks. The region’s early embrace of direct potable reuse and pending PFAS limits guide technology adoption patterns toward high-grade membranes, granular activated carbon, and novel electro-chemical destruction cells. Municipal water boards in Texas, Colorado, and California now require detailed life-cycle cost analyses that favor high-recovery architectures and AI-enabled monitoring, elevating software vendors within the water and wastewater treatment technologies market.

Europe remains a crucible for intellectual property, producing 40% of global water-related patents between 1992 and 2021, with PFAS remediation, resource-positive biosolids, and energy-neutral filtrations at the forefront.

List of Companies Covered in this Report:

• AECOM
• Aquatech
• Black & Veatch Corporation
• Doosan Enerbility
• DuPont
• Ecolab
• HDO
• Hitachi, Ltd.
• Kurita Water Industries Ltd.
• Mott MacDonald
• Pentair
• REMONDIS SE & Co. KG
• Siemens
• SLB
• Thermax Limited
• Veolia
• WABAG
• Xylem

Additional Benefits:

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