Water And Wastewater Treatment Equipment Market Size & Forecast

Water And Wastewater Treatment Equipment Market Valuation and 2035 Outlook

The global water and wastewater treatment equipment market was valued at USD 78.3 billion in 2025 and is projected to reach USD 136.0 billion by 2035, expanding at a 5.7% CAGR over the forecast period. This growth reflects the accelerating global transition from basic contaminant removal toward integrated treatment plants that recover water, energy, and nutrients while meeting progressively tighter discharge and drinking-water standards.

North America remains the dominant regional market, capturing 38.9% of global revenue in 2025, equivalent to USD 30.4 billion. Public infrastructure spending is a primary demand driver: the U.S. Environmental Protection Agency estimates drinking-water systems require USD 625 billion over 20 years for treatment upgrades, pipes, and storage, while the Infrastructure Investment and Jobs Act provides more than USD 50 billion for U.S. drinking-water, wastewater, and stormwater infrastructure.

• Global market size (2025): USD 78.3 billion
• Forecast market size (2035): USD 136.0 billion
• Forecast CAGR (2025–2035): 5.7%
• Leading region: North America (38.9% share)

Filtration Systems and Media Dominate Product Type Segmentation

Filtration systems and media represent the largest product type segment, accounting for 30.2% of total market share in 2025. This leadership position is sustained by the universal deployment of granular media filters, cartridge filtration, and membrane pre-treatment across both municipal and industrial applications.

The membrane systems segment is gaining disproportionate momentum as utilities pursue water reuse initiatives and industries adopt membrane bioreactor (MBR) technology for space-constrained facilities. Disinfection equipment demand is being reshaped by the EPA's PFAS drinking-water limits, which set maximum levels of 4 ppt for PFOA, 4 ppt for PFOS, and 10 ppt each for PFHxS, PFNA, and HFPO-DA/GenX, alongside a Hazard Index MCL for regulated PFAS mixtures.

Secondary and Biological Treatment Equipment Leads Process Stage Analysis

Secondary/biological treatment equipment commanded 41.2% of total market share in 2025, the largest process-stage segment. This reflects the central role of activated sludge, biological nutrient removal, and membrane bioreactor systems in meeting tightening organic and nutrient discharge limits globally.

• Primary treatment equipment demand is sustained by urbanization-driven capacity expansion, with primary clarifiers alone representing 29.0% of the primary equipment sub-market.
• Tertiary and advanced treatment equipment is the fastest-advancing stage, propelled by micropollutant, PFAS, and phosphorus removal mandates.
• The EU's revised Urban Wastewater Treatment Directive, in force since January 1, 2025, extends treatment requirements to micropollutants and stormwater while targeting sector-wide energy neutrality.

Municipal Water Treatment Holds Largest Application Share

Municipal water treatment accounted for 35.6% of total market share in 2025, the single largest application segment. Within the primary treatment equipment sub-market specifically, municipal applications commanded an even higher 63.6% share, underscoring the public-sector dominance of foundational treatment infrastructure.

Industrial wastewater treatment is the fastest-growing application, driven by UN-Water's finding that among 22 reporting countries only 38% of industrial wastewater was treated and just 27% was safely treated. This compliance gap represents a substantial addressable market for biological reactors, tertiary filtration, and real-time quality sensors.

Power Generation Leads End-use Industry Demand

Power generation dominated the end-use industry landscape with 25.5% of total market share in 2025. Cooling-water treatment, boiler feedwater purification, and flue-gas desulfurization wastewater management underpin this leadership.

• Oil & Gas and Refining/Petrochemicals: produced-water treatment and effluent compliance
• Chemicals and Pharmaceuticals: high-purity process water and complex effluent streams
• Food and Beverage: process water reuse and organic load reduction
• Pulp & Paper and Mining: high-volume clarification and tailings management

Infrastructure Investment and Policy Catalysts Reshape Demand

Policy-driven capital deployment is a defining feature of the current market cycle. Key public benchmarks include:

• WIFIA financing: By June 2026, the EPA had closed 154 WIFIA loans providing USD 23 billion for projects valued at approximately USD 51 billion, serving about 67 million people and creating 173,000 jobs.
• England and Wales: Ofwat approved up to £104 billion in water-sector expenditure for April 2025–March 2030, with nearly £12 billion allocated to storm-overflow and wastewater improvements designed to reduce spills by 45%.
• EU water reuse: Only 2.4% of wastewater was reused across the EU in 2025, with national rates ranging from 0% to 80%, signaling substantial untapped equipment demand.
• U.S. long-term requirement: NUCA estimated approximately USD 4.8 trillion must be invested over 20 years to maintain U.S. water and wastewater systems.
• UK long-term investment: The National Audit Office estimated water companies require at least £290 billion in enhancement investment before 2050.

Desalination and Membrane Systems Expand in Water-Scarce Regions

Desalination and specialty equipment represent a high-growth frontier. In April 2026, the World Bank approved USD 208.5 million to expand Tunisia's Zarat plant from 50,000 to 100,000 cubic metres per day, including 100,000 smart meters within a wider USD 700 million, ten-year programme expected to improve services for 2.3 million people.

The Butimba Water Treatment Plant began operations in June 2025 with a capacity of 44,000 cubic metres per day, improving water access for around 450,000 people; funding included a €75 million AFD loan, a €45 million EIB loan, and a €9.9 million EU grant. These multilateral-funded projects demonstrate how development finance directly translates into equipment procurement demand.

Competitive Landscape and Strategic Vendor Positioning

The market features a mix of diversified water majors, specialized technology providers, and regional equipment manufacturers. Leading global participants include Veolia, SUEZ, Xylem, Evoqua Water Technologies, Pentair, Aquatech International, GE Water & Process Technologies, Kurita Water Industries, and Aqua-Aerobic Systems.

Strategic differentiation is increasingly anchored in digital monitoring instrumentation, energy-efficient aeration, and membrane bioreactor integration. Utilities facing cost pressure—approximately 30% of utility executives struggled to recover operating costs in 2025, and about 25% planned rate increases—are prioritizing total cost of ownership, creating advantage for vendors offering performance guarantees and smart-meter-enabled leak reduction.