U.S. Wastewater Secondary Treatment Equipment Market Summary

The U.S. wastewater secondary treatment equipment market size was valued at USD 2.62 billion in 2024 and is anticipated to expand at a CAGR of 3.1% from 2025 to 2030. This growth is largely attributed to stringent government regulations aimed at controlling wastewater emissions from municipal and industrial sectors, with agencies such as the Environmental Protection Agency (EPA) enforcing strict standards to maintain water quality. Alongside regulatory enforcement, growing public awareness of environmental sustainability and the urgent need for clean water resources further supports demand. In addition, the necessity to upgrade outdated infrastructure and manage the challenges posed by rapid urbanization contributes significantly to market expansion, creating ample opportunities for advanced and innovative wastewater treatment technologies.

The wastewater secondary treatment equipment market in the U.S. is poised for robust growth, supported primarily by these regulatory measures and the rising urgency to ensure safe water discharge and reuse. Wastewater secondary treatment equipment involves systems designed to treat wastewater through the removal of organic matter, pollutants, and biological contaminants, ensuring compliance with safety and environmental standards. Increasing recognition of water scarcity, coupled with pollution concerns, has encouraged government and private sector investment in treatment infrastructure. Stricter enforcement by the EPA and the implementation of federal acts such as the Clean Water Act continue to reinforce the need for advanced treatment solutions across the country.

Key Market Trends & Insights

• The municipal segment led the market and accounted for the largest revenue share of 61.1% in 2024. Its dominance is primarily driven by rapid urbanization, rising population density, and the consequent surge in wastewater generation. Municipalities are under constant pressure to provide efficient and cost-effective wastewater management solutions. In response, they are increasingly adopting secondary treatment systems that can meet high water quality standards while ensuring long-term sustainability. Regulatory frameworks, particularly under the Clean Water Act, mandate municipalities to adhere to stringent treatment guidelines, compelling investments in new equipment and advanced technologies, thereby accelerating the growth of the municipal segment.
• The industrial application segment is projected to grow at a CAGR of 3.5% over the forecast period. This growth is primarily due to the introduction of stringent environmental regulations requiring industries to adopt effective wastewater treatment systems to minimize their environmental footprint and comply with federal and state-level policies. Industries such as chemicals, pharmaceuticals, food and beverages, and textiles generate significant volumes of wastewater containing hazardous pollutants, making efficient secondary treatment a necessity. The integration of advanced treatment equipment not only helps industries achieve compliance but also supports corporate sustainability goals and resource recovery initiatives.

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Market Size & Forecast

• 2024 Market Size: USD 2.62 billion
• 2030 Projected Market Size: USD 3.11 billion
• CAGR (2025 - 2030): 3.1%

Key Companies & Market Share Insights

Leading companies in the U.S. wastewater secondary treatment equipment market include Xylem, Inc., Pentair plc, Ecolab Inc., and others. These companies are actively adopting strategies to strengthen their competitive positions. Approaches include mergers and acquisitions to expand product portfolios and extend geographic reach, along with strategic investments in research and development aimed at delivering innovative and efficient wastewater treatment solutions. Many are also entering into partnerships and collaborations to harness technological advancements and improve service delivery capabilities. In addition, customer-focused approaches remain a priority, with tailored solutions designed to meet specific regulatory standards and operational challenges across both municipal and industrial applications.

Xylem, Inc. is a leading manufacturer that offers a comprehensive range of products, including biological wastewater treatment systems, advanced aeration technologies, filtration equipment, and disinfection solutions. The company emphasizes innovation and sustainability, positioning itself as a key player in addressing diverse wastewater management needs.

Ecolab Inc. provides an extensive portfolio of products and services, including advanced chemical treatment programs, monitoring systems, and filtration technologies. Its solutions are designed to optimize wastewater processes while helping customers achieve efficiency, cost-effectiveness, and compliance with environmental regulations.

Key Players

• Xylem, Inc.
• Pentair plc
• Evoqua Water Technologies LLC
• Aquatech International LLC
• SUEZ
• Ecolab Inc.
• Calgon Carbon Corporation
• Toshiba Water Solutions Private Limited
• Veolia
• Ecologix Entertainment Systems, LLC
• Parkson Corporation
• Lenntech B.V.
• H2O Innovation
• Smith & Loveless
• Samco Technologies, Inc.

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Conclusion

The U.S. wastewater secondary treatment equipment market is expected to see steady and consistent growth over the coming years, largely driven by regulatory enforcement, urbanization, and growing public concern for environmental sustainability. Municipalities will continue to dominate due to population growth and infrastructure demands, while industrial sectors increasingly invest in advanced systems to meet compliance and sustainability objectives. Key companies are shaping the competitive landscape through innovation, partnerships, and customer-centric approaches, ensuring reliable solutions for evolving challenges. With water scarcity and pollution concerns intensifying, secondary treatment technologies will play an essential role in safeguarding water quality and supporting long-term sustainability.