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

The wastewater treatment services market size was valued at USD 68.32 billion in 2025 and is estimated to grow from USD 72.64 billion in 2026 to reach USD 98.74 billion by 2031, at a CAGR of 6.33% during the forecast period (2026-2031). This report is segmented by Service Type (Operations and Process Control, Design and Engineering Consulting, Building and Installation, Maintenance and Repair, and Other Service Types), End-Use Industry (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 Wastewater Treatment Services Market Trends and Insights

Stringent Effluent-Discharge and Water-Quality Regulation

The wastewater treatment services market gains a stable source of demand when discharge rules require utilities to upgrade treatment systems. The revised European Union Urban Wastewater Treatment Directive covers agglomerations of 1,000 population equivalents and sets staged requirements for secondary, tertiary, and quaternary treatment. The framework assigns part of the advanced-treatment funding burden to pharmaceutical and cosmetics producers through extended producer responsibility. Member states will move from reporting under the prior framework to reporting under the new directive in 2028, which supports early planning for operating and upgrade contracts. In the United States, the Steam Electric Power Generating Effluent Limitations Guidelines set another layer of wastewater compliance for power-sector sites and connected public treatment systems. These requirements support the wastewater treatment services market and favor providers that can document compliance performance and manage complex treatment processes over long contract periods.

Water Reuse and Circular-Water Investment

Water reuse is widening the role of wastewater treatment from disposal management to supply security. The World Bank stated that reuse could increase eightfold by 2040 to 430 million cubic meters per day, with up to USD 340 billion of investment required to reach that scale. The wastewater treatment services market, therefore, has opportunities in systems that produce treated water for municipal, industrial, and high-purity applications. Reuse systems can create longer service engagements because water quality must be maintained continuously after a plant is commissioned. Providers with membrane operations, monitoring, and operator training capabilities can, therefore, compete on reliability as well as treatment capacity.

High Capital and Operating Cost of Advanced Treatment

Advanced treatment systems can require more capital and operating expenditure than smaller utilities can fund. Membrane bioreactors, advanced oxidation processes, and PFAS treatment trains can be difficult to finance for smaller municipalities and developing-country utilities. A 10,000 m³ per day industrial reverse osmosis reuse plant requires USD 8 million to USD 12 million upfront, while membrane replacement adds USD 1.5 million to USD 2 million every 3 to 5 years. Aeration can account for 50% to 60% of a treatment plant’s energy budget, which makes operating costs difficult to reduce without better controls. The European Union directive includes a derogation provision where investment would be excessively onerous, recognizing that some communities face real funding constraints. The wastewater treatment services market may, therefore, develop unevenly, with well-funded operators moving faster while other asset owners defer upgrades and build future remediation demand.

Other drivers and restraints analyzed in the detailed report include:

• Industrial Expansion in Water-Intensive Sectors
• Aging Treatment Assets and Mandatory Upgrades
• PFAS and Micropollutant Liability Allocation Uncertainty

Segment Analysis

Operations and process control held 31.67% of the wastewater treatment services market share in 2025. This position reflected the need for continuous operation, certified staffing, and dependable compliance management after a facility is handed to an operator. Changing an operating provider can introduce technical and regulatory risks, especially at plants with established process settings and experienced site teams. Building and installation, along with design and engineering consulting, support recurring operations revenue because early project involvement can create familiarity with the facility. A provider that designs and commissions a treatment system can be well placed to manage it after startup. The wastewater treatment services industry consequently rewards companies that can connect project delivery with long-term operations and maintenance.

Maintenance and repair is projected to advance at a 6.96% CAGR through 2031. Aging assets increase demand for inspection, repair, replacement planning, and equipment reliability work. Predictive maintenance can improve the value of these contracts when it identifies faults before they affect treatment performance. A 2025 study found that an explainable artificial intelligence framework achieved more than 94% fault-detection accuracy for wastewater aeration systems. Other service types, including sludge management and digital monitoring, provide additional service opportunities that complement core operations work. Providers can use performance measures to show the operational value of maintenance instead of competing only on labor cost.

Complete Report Scope:

• By Service Type
  • Operations and Process Control
  • Design and Engineering Consulting
  • Building and Installation
  • Maintenance and Repair
  • Other Service Types
• By End-Use Industry
  • Municipal
  • Industrial
    • Chemical and Pharmaceutical
    • Oil and Gas
    • Food and Beverage
    • Pulp and Paper
    • Metal and Mining
    • Power Generation
    • Other Industrial Industries
• By Geography
  • Asia-Pacific
    • China
    • India
    • Japan
    • South Korea
    • ASEAN Countries
    • Rest of Asia-Pacific
  • North America
    • United States
    • Canada
    • Mexico
  • Europe
    • Germany
    • United Kingdom
    • France
    • Italy
    • NORDIC Countries
    • 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 accounted for 38.52% of the wastewater treatment services market share in 2025 and is projected to grow at a 7.02% CAGR through 2031. China has built more than 10,000 wastewater treatment plants with a daily capacity exceeding 200 million cubic meters. India’s Namami Gange Mission targets 7.00 billion Liters per Day (MLD) of sewage treatment capacity by December 2026 through 200 sanctioned projects. South Korea is developing advanced reuse infrastructure to supply semiconductor manufacturing. Construction began in September 2026 on a dedicated pipeline that will supply 310,000 metric tons of water per day from Paldang Dam to the Yongin complex. Vietnam and the Philippines are also working to close the gap between industrial output and treatment capacity.

North America remains a large service base because asset renewal and compliance work are ongoing needs. Federal financing supports community water and wastewater systems and helps convert infrastructure plans into service opportunities. Pennsylvania American Water’s USD 722 million investment in 2025 showed the scale of private utility work in the region. Canada and Mexico add demand through population needs and infrastructure gaps.

Europe’s wastewater treatment services market size is supported by a compliance schedule that extends through 2045. The revised directive creates demand for tertiary treatment, micropollutant removal, and improved energy performance at relevant facilities. Nordic countries and Germany focus on energy-neutral plant upgrades, while Central and Eastern Europe face larger legacy infrastructure gaps. The Middle East and Africa region is increasingly shaped by water scarcity and reuse requirements. South America offers long-duration concession opportunities as Brazil’s sanitation framework supports private participation. Together, these regional patterns create different needs for providers, from advanced treatment in mature systems to new capacity and operating support in developing systems.

List of Companies Covered in this Report:

• AECOM
• Aquatech
• Black & Veatch Corporation
• DuPont
• Ecolab Inc.
• Jacobs
• Kemira Oyj
• Kurita Water Industries Ltd.
• Pentair
• Solenis
• Thermax Limited
• Veolia
• WABAG
• WSP
• Xylem

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