Secondary Water And Wastewater Treatment Equipment Market - Global Industry Size, Share, Trends, Opportunity, and Forecast, Segmented By Equipment Type (Biological Treatment Equipment, Clarification Equipment, Filtration Equipment, Disinfection Equipment), By Application (Municipal Wastewater Treatment, Industrial Wastewater Treatment), By Region, and By Competition, 2021-2031F

Forecast Period	2027-2031
Market Size (2025)	USD 25.02 Billion
CAGR (2026-2031)	5.44%
Fastest Growing Segment	Filtration Equipment
Largest Market	North America
Market Size (2031)	USD 34.38 Billion

Market Overview

The Global Secondary Water And Wastewater Treatment Equipment Market is projected to grow from USD 25.02 Billion in 2025 to USD 34.38 Billion by 2031 at a 5.44% CAGR. The Global Secondary Water and Wastewater Treatment Equipment Market encompasses technologies and systems designed to remove biodegradable organic matter, dissolved and suspended solids from wastewater following primary treatment. This critical phase primarily utilizes biological processes with microorganisms to purify effluent, preparing it for safe discharge or further advanced treatment. The market's expansion is fundamentally driven by increasing global population, escalating urbanization leading to higher wastewater volumes, and more stringent environmental regulations governing effluent discharge quality. Furthermore, growing industrial water demand necessitating robust treatment solutions and mounting concerns over freshwater scarcity significantly contribute to market propulsion.

According to the IDRA Desalination & Reuse Handbook 2025–2026, global water reuse capacity surged by 52% from 2020 to 2025, indicating increased investment in wastewater purification processes including secondary treatment technologies. Despite these growth drivers, a significant challenge impeding market expansion is the substantial capital expenditure and operational costs associated with the installation and maintenance of advanced treatment infrastructure, particularly in developing economies where budgetary constraints can limit adoption and upgrades.

Key Market Drivers

Stringent environmental regulations and increasingly strict discharge standards represent a primary driver for the Global Secondary Water and Wastewater Treatment Equipment Market. Governments and regulatory bodies worldwide are implementing updated directives to curb water pollution and ensure the safety of discharged effluent, thereby necessitating upgrades and new installations of advanced treatment systems. For instance, the European Union's revised Urban Wastewater Treatment Directive became effective on January 1, 2025, introducing stricter treatment standards and extending coverage to smaller communities. According to Xinhua, in August 2023, China unveiled an action plan aiming to increase daily sewage treatment capacity by 12 million cubic meters by 2025, reflecting significant governmental investment in infrastructure to meet evolving environmental goals.

Concurrently, growing water scarcity and the increasing demand for water reuse are significantly propelling market expansion. Depleting freshwater resources globally are compelling industries and municipalities to adopt water recycling technologies to secure sustainable water supplies. This shift is evident in the substantial increase in projects focused on treating wastewater for reuse. According to The Driller, in November 2025, citing the IDRA Desalination & Reuse Handbook 2025–2026, over 200 wastewater reuse projects have been recorded since 2022, highlighting considerable investment in these solutions. Furthermore, the industry's sustained activity is underscored by events such as the IWA's 2025 Water and Development Congress & Exhibition in Bangkok, Thailand, which drew around 1700 delegates and 200 exhibitors, fostering collaboration and showcasing advancements in treatment technologies.

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Key Market Challenges

A significant challenge impeding the growth of the Global Secondary Water and Wastewater Treatment Equipment Market is the substantial capital expenditure and operational costs associated with installing and maintaining advanced treatment infrastructure. These financial burdens are particularly pronounced in developing economies, where budgetary constraints frequently limit the adoption and necessary upgrades of modern secondary treatment technologies. The high initial investment required for sophisticated biological reactors, clarifiers, and filtration systems, coupled with ongoing expenses for energy, chemicals, and skilled labor, creates a considerable barrier.

This directly hampers market expansion by deterring municipalities and industries with limited financial resources from investing in new equipment or replacing outdated systems, thereby slowing overall market penetration and development in critical regions. According to the American Water Works Association's 2025 State of the Water Industry report, based on a late 2024 survey, 30% of utility executives reported struggling to meet costs from user rates and service charges. This indicates a widespread financial difficulty that directly impacts the ability of water utilities to fund crucial capital improvements for wastewater treatment.

Key Market Trends

Increased integration of Artificial Intelligence and the Internet of Things is profoundly influencing the global secondary water and wastewater treatment equipment market by enabling enhanced operational optimization and predictive maintenance. This trend facilitates real-time monitoring of processes, equipment performance, and effluent quality. AI algorithms analyze extensive datasets from IoT sensors to predict equipment failures, optimize chemical dosing, and reduce energy consumption, leading to more efficient and reliable operations. For example, according to TIME100 Most Influential Companies, April 30, 2026, in 2025, Amazon helped fund the deployment of Xylem's real-time water monitoring software platform, Xylem Vue, in Mexico City and Monterrey, Mexico, with projects expected to save over 1.3 billion liters of water annually. Such digital transformations improve resource management and reduce operational costs.

Another critical trend reshaping the market is the targeted treatment of emerging contaminants, including per- and polyfluoroalkyl substances (PFAS) and micropollutants. Growing scientific understanding and stricter global regulations necessitate specialized treatment technologies beyond conventional secondary processes. This drives investment in advanced oxidation processes, granular activated carbon filtration, and membrane technologies to remove these persistent pollutants, ensuring compliance and safeguarding public health. A notable development, highlighted by TIME100 Most Influential Companies, April 30, 2026, is that in 2025, Veolia opened a plant in Delaware capable of filtering 30 million gallons of water per day for PFAS treatment, serving over 100,000 residents. This focus on specific contaminant removal propels innovation and adoption of advanced equipment.

Segmental Insights

The Global Secondary Water and Wastewater Treatment Equipment Market is experiencing substantial expansion, with Filtration Equipment emerging as the fastest-growing segment. This rapid growth is primarily driven by increasingly stringent global environmental regulations, which mandate higher water quality standards and stricter limits on industrial and municipal wastewater discharge. Regulatory bodies worldwide, such as the U.S. Environmental Protection Agency (EPA), enforce these rigorous standards, compelling industries and municipalities to adopt advanced treatment solutions. Furthermore, escalating concerns regarding water scarcity and the critical need for clean water are significantly boosting the demand for efficient wastewater recycling and reuse, for which filtration technologies are indispensable. Continuous advancements in membrane filtration and other related technologies also enhance treatment efficacy and broaden the applicability of filtration systems across diverse sectors.

Regional Insights

North America leads the Global Secondary Water And Wastewater Treatment Equipment Market, primarily due to the region's stringent environmental regulations and ongoing commitment to sustainable water management practices. Regulatory bodies, such as the Environmental Protection Agency (EPA), enforce comprehensive legislation like the Clean Water Act, which mandates high standards for wastewater purification and discharge limits. This regulatory pressure compels both municipal and industrial sectors to invest significantly in advanced secondary treatment systems and infrastructure upgrades to ensure compliance. Furthermore, a strong focus on modernizing aging water infrastructure and increasing public awareness regarding water conservation drives the adoption of innovative treatment technologies across the region.

Recent Developments

• In February 2026, Sumitomo Electric launched a new compact membrane treatment system designed for industrial wastewater and waste liquids containing oil. This system is capable of significantly reducing industrial waste disposal volumes by up to 90%. The introduction of this product offers an advanced solution within the global secondary water and wastewater treatment equipment market, particularly for industries seeking efficient and sustainable methods for managing challenging liquid waste streams. The system leverages the company's POREFLON membrane technology, ensuring stable and long-term operation, and contributes to improved environmental performance and operational efficiency for industrial facilities.
• In February 2026, Alfa Laval commenced its involvement as a technology solution supplier in the EXTRACT project, a three-year research initiative focused on resource recovery from sewage sludge. Funded by the Danish Environmental Protection Agency, this collaboration investigates the feasibility of extracting biopolymers from sewage sludge for circular recycling systems. The project aims to assess the suitability of these naturally occurring compounds as high-value materials, potentially replacing crude oil-derived polymer binders. This research is directly relevant to enhancing sustainability and efficiency in the global secondary wastewater treatment equipment market by reducing residual sludge volume and exploring new resource utilization pathways.
• In October 2025, researchers from Rice University, in collaboration with international partners including K-Water, achieved a significant breakthrough in developing an eco-friendly technology for rapidly capturing and destroying per- and polyfluoroalkyl substances (PFAS) in water. This innovative method utilizes a layered double hydroxide material, which effectively binds PFAS molecules in various water types, including wastewater. The research demonstrated the material's high effectiveness in both static and continuous-flow systems, showing strong potential for large-scale applications in municipal water treatment and industrial cleanup. This development directly addresses persistent contaminant removal challenges within the global secondary water and wastewater treatment equipment market.
• In July 2025, DASCO, Inc. introduced its Advanced Oxidation Process (AOP) system, marking a significant advancement in water treatment technology. This innovative system integrates UV-based ozone generation with optimized flow dynamics to enhance ozone solubility and produce hydroxyl radicals. The compact, continuous-flow design improves reaction kinetics and pollutant degradation, addressing challenges in removing complex organic pollutants from water and wastewater. This development offers an efficient, cost-effective, and environmentally improved solution for persistent water quality issues, reducing the need for large contact tanks and extensive infrastructure in secondary water and wastewater treatment applications.

Key Market Players

• Veolia Environnement SA
• Xylem Inc.
• SUEZ SA
• Pentair plc
• Evoqua Water Technologies LLC
• Aquatech International LLC
• Ecolab Inc.
• Ovivo Inc.
• Toshiba Water Solutions Pvt. Ltd.
• Parkson Corporation

By Equipment Type	By Application	By Region
Biological Treatment Equipment Clarification Equipment Filtration Equipment Disinfection Equipment	Municipal Wastewater Treatment Industrial Wastewater Treatment	North America Europe Asia Pacific South America Middle East & Africa

Report Scope:

In this report, the Global Secondary Water And Wastewater Treatment Equipment Market has been segmented into the following categories, in addition to the industry trends which have also been detailed below:

• Secondary Water And Wastewater Treatment Equipment Market, By Equipment Type:

• Biological Treatment Equipment
• Clarification Equipment
• Filtration Equipment
• Disinfection Equipment

• Secondary Water And Wastewater Treatment Equipment Market, By Application:

• Municipal Wastewater Treatment
• Industrial Wastewater Treatment

• Secondary Water And Wastewater Treatment Equipment Market, By Region:

• North America
• United States
• Canada
• Mexico
• Europe
• France
• United Kingdom
• Italy
• Germany
• Spain
• Asia Pacific
• China
• India
• Japan
• Australia
• South Korea
• South America
• Brazil
• Argentina
• Colombia
• Middle East & Africa
• South Africa
• Saudi Arabia
• UAE