Have you ever wondered which companies lead the world in designing and manufacturing sewage treatment plants? Which brands provide the most reliable, efficient, and eco-friendly solutions for municipal, industrial, and residential wastewater management? How do these companies ensure compliance with strict environmental regulations while maintaining cost-effective operations? If you’ve asked these questions, you’re not alone — understanding the top players in this sector can help governments, businesses, and developers make informed decisions for sustainable wastewater treatment.
In this article, we highlight the top 10 sewage treatment plant manufacturers globally, providing an overview of their expertise, technological innovations, and key advantages. From companies offering compact, decentralized systems to those delivering large-scale municipal and industrial plants, this guide offers insights into leaders who set the standard in efficiency, sustainability, and reliability. By reviewing their products and achievements, readers can quickly identify which manufacturers align with their wastewater treatment needs.
We will explore the leading companies shaping the global sewage treatment industry, examining their technologies, product portfolios, and market presence. Continue reading to discover the top manufacturers whose solutions are revolutionizing wastewater management and delivering high-quality effluent worldwide.
| Company Name | Headquarters |
| 1. BIOROCK | Luxembourg |
| 2. Norweco | United States |
| 3. Cleantech Water | Ahmedabad, Gujarat, India |
| 4. Evoqua Water Technologies | Pittsburgh, Pennsylvania, United States |
| 5. Veolia Water Technologies | Paris, France |
| 6. B&P Water Technologies | Rome, Italy |
| 7. Hamann | Hollenstedt, Germany |
| 8. Ravi Enviro | Vadodara, Gujarat, India |
| 9. Smith & Loveless Inc. | Lenexa, Kansas, United States |
| 10. Orenco Systems, Inc. | Sutherlin, Oregon, United States |
Company Profile:
BIOROCK is a globally recognized manufacturer and innovator in the field of wastewater and sewage treatment solutions. Established in 1988, the company has pioneered compact, sustainable, and highly efficient wastewater treatment technologies, focusing on non-electric, low-maintenance systems that serve residential, commercial, and institutional applications worldwide. With a presence in over 75 countries, BIOROCK’s solutions are designed to address the growing global demand for eco-friendly and cost-effective sewage treatment systems.
What sets BIOROCK apart in the sewage treatment industry is its emphasis on simplicity, sustainability, and long-term performance. The company’s innovative products, such as its non-electric bioreactor systems and modular treatment lines, provide high-quality effluent with minimal energy use and lower operational costs, making them ideal for locations without access to power or where traditional sewage infrastructure is impractical. BIOROCK also offers a range of certified wastewater treatment units — from compact systems for individual homes to scalable solutions suitable for larger communities — leveraging unique biological media that enhances natural purification and reduces maintenance frequency.
Establishment: 1988
Headquarters: Luxembourg
Main Products:
Company Profile:
Norweco is a long-established American manufacturer specializing in advanced wastewater and sewage treatment solutions. Founded in 1906, the company has over a century of experience in developing reliable and innovative treatment technologies for residential, commercial, municipal, and decentralized applications. Headquartered in the United States, Norweco has built a strong reputation for engineering durable sewage treatment plants that comply with strict environmental and regulatory standards across North America and international markets.
Norweco’s core strength in sewage treatment lies in its proprietary treatment processes, integrated system design, and proven long-term performance. The company is widely known for its prefabricated and packaged sewage treatment plants, which combine biological treatment, clarification, and disinfection in compact footprints. Norweco’s systems are designed for energy efficiency, ease of operation, and consistent effluent quality, making them suitable for small communities, commercial facilities, and sites where centralized sewer infrastructure is unavailable. Its focus on in-house manufacturing, rigorous quality control, and field-tested technologies positions Norweco as a trusted global supplier of dependable sewage treatment solutions.
Establishment: 1906
Headquarters: United States
Main Products:
Company Profile:
Cleantech Water is an India-based wastewater and sewage treatment plant manufacturer known for delivering reliable, efficient, and environmentally compliant solutions for both domestic and industrial clients. Founded in 2013 and headquartered in Ahmedabad, Gujarat, the company has quickly built a reputation for quality engineering, advanced treatment technologies, and tailored solutions that address diverse wastewater challenges across sectors. Cleantech Water’s strong presence in India and international collaborations with technology partners in the USA, UK, and Germany underline its commitment to global standards and performance.
Cleantech Water’s competitive advantage in the sewage treatment industry lies in its broad portfolio of technologically advanced treatment systems and client-focused approach. The company specializes in SBR and MBBR sewage treatment plants, MBR systems, greywater treatment, and effluent treatment plants, providing compact and scalable solutions that meet stringent discharge norms. Its products emphasize high treatment efficiency, durability, and low operational costs, while its engineering team supports customized design and after-sales service to optimize plant performance. This combination of innovation, technical expertise, and commitment to sustainability makes Cleantech Water a preferred choice for wastewater management projects.
Establishment: 2013
Headquarters: Ahmedabad, Gujarat, India
Main Products:
Company Profile:
Evoqua Water Technologies is a leading global provider of water and wastewater treatment solutions, offering an extensive portfolio of products, engineered systems, and services to support industrial, municipal, and commercial clients. Headquartered in Pittsburgh, Pennsylvania, Evoqua has more than a century of experience helping customers address complex water challenges, earning a strong reputation for quality, reliability, and sustainability in water treatment technologies. The company serves customers in over 150 locations worldwide and supports more than 38,000 clients with over 200,000 installations globally.
In the field of sewage and wastewater treatment, Evoqua stands out for its integrated approach that combines advanced biological treatment, clarification, filtration, nutrient removal, and biosolid management solutions. The company’s treatment systems are designed to meet stringent regulatory standards while optimizing performance through energy efficiency and operational reliability. Evoqua also leverages digital monitoring and lifecycle services that enhance wastewater system performance, reduce maintenance costs, and support long-term sustainability goals. Its engineered solutions and aftermarket services make it a trusted partner for municipalities and industries seeking high-quality, compliant wastewater treatment.
Establishment: 2013
Headquarters: Pittsburgh, Pennsylvania, United States
Main Products:
Company Profile:
Veolia Water Technologies is a world-leading provider of water and wastewater treatment solutions and a subsidiary of the global Veolia Group, one of the largest environmental services companies with over 160 years of history in resource management. The company specializes in designing, engineering, and delivering advanced water and sewage treatment plants for municipal, industrial, and commercial clients around the world. With a presence across more than 130 countries and a vast portfolio of patented technologies, Veolia Water Technologies supports sustainable water management and environmental compliance on a global scale.
In the sewage treatment sector, Veolia stands out for its comprehensive and innovative approach to wastewater purification, resource recovery, and operational optimization. Its solutions cover the full sewage treatment cycle — from primary and secondary treatment to advanced sludge processing and nutrient removal — with digital optimization tools that enhance performance, reduce energy consumption, and enable water reuse where applicable. Veolia’s technologies, including high-efficiency clarifiers, biological treatment systems, and integrated monitoring services, deliver reliable, cost-effective performance while helping clients achieve stringent effluent standards and sustainability goals.
Establishment: 1853
Headquarters: Paris, France
Main Products:
Company Profile:
B&P Water Technologies is an Italian engineering company specializing in the design, manufacture, and supply of advanced water treatment and wastewater solutions for civil, industrial, and marine applications. Founded in 2006 and headquartered in Rome, Italy, the company serves a global customer base with custom-engineered systems and turnkey plants tailored to project requirements. B&P Water Technologies is ISO 9001 certified and is recognized for its commitment to quality, reliability, and innovation in water and wastewater treatment equipment.
In the field of sewage treatment, B&P Water Technologies stands out for its modular packaged sewage treatment plants that incorporate proven technologies such as extended aeration, MBBR (Moving Bed Biofilm Reactor), and MBR (Membrane Bioreactor) to deliver high-quality effluent and support water reuse objectives. Its compact, pre-assembled units reduce on-site installation time and costs, while customizable configurations ensure performance suited to small communities, commercial sites, and industrial facilities. The company’s engineering expertise, combined with comprehensive pre-delivery testing and turnkey delivery, makes B&P a competitive choice for efficient, durable wastewater treatment solutions.
Establishment: 2006
Headquarters: Rome, Italy
Main Products:
Company Profile:
Hamann, formally known as HAMANN AG, is a Germany-based specialist and globally recognized manufacturer of sewage and wastewater treatment technology for maritime and offshore applications. Since its founding in 1972, the company has built a strong reputation for designing, engineering, and supplying advanced sewage treatment plants and associated systems that help vessels meet stringent international discharge regulations and protect marine environments. All Hamann systems are designed and manufactured at its facility in Hollenstedt, Germany, and supported by a global network of more than 40 sales agents and certified service partners.
Hamann’s strength in the sewage treatment industry lies in its highly engineered, compact, and reliable treatment solutions that are especially tailored for marine use. The company’s marine sewage treatment plants, such as the HAMANN HL-CONT series, combine maceration, dissolved air flotation (DAF), and UV disinfection technologies to achieve high-quality effluent while minimizing maintenance and operational complexity. Hamann systems are known for their robust “Made in Germany” quality, ease of operation, and ability to deliver consistent performance across a wide range of vessel sizes — from yachts and ferries to cruise ships and naval ships.
Establishment: 1972
Headquarters: Hollenstedt, Germany
Main Products:
Company Profile:
Ravi Enviro Industries Private Limited is an India-based manufacturer and EPC provider of water and wastewater treatment systems, offering end-to-end environmental solutions that include design, engineering, manufacturing, erection, commissioning, and operation & maintenance services. The company delivers turnkey projects for Sewage Treatment Plants (STPs), Effluent Treatment Plants (ETPs), Water Treatment Plants (WTPs), and related systems across industrial, commercial, and municipal sectors, with a focus on tailored solutions that meet client requirements and regulatory standards. Its turnkey execution capability and in-house manufacturing facility enable consistent quality and performance.
In the sewage treatment plant segment, Ravi Enviro stands out for its technologically advanced and customizable STP solutions that integrate biological treatment processes such as MBBR, SBR, and UASB to deliver high-quality effluent while optimizing operational efficiency and cost. The company’s compact, plug-and-play-ready plants are designed for ease of installation and reliable performance, making them suitable for a wide range of applications including government, industrial, and residential projects. Ravi Enviro’s commitment to sustainability, combined with its experience in executing projects nationwide and overseas, positions it as a competitive supplier of efficient sewage treatment solutions.
Establishment: 2020
Headquarters: Vadodara, Gujarat, India
Main Products:
Company Profile:
Smith & Loveless Inc. (S&L) is a renowned American manufacturer and engineer of water and wastewater treatment systems with over 75 years of industry experience, serving municipal, industrial, commercial, and governmental sectors worldwide. Founded in 1946 by B. Alden Smith and Compere Loveless, S&L has grown from a Kansas‑based engineering firm into a global provider of pre‑engineered treatment, pumping, and headworks solutions with installations on all seven continents. The company’s commitment to rugged, efficient, and durable systems has earned it a strong reputation in the wastewater treatment industry.
Smith & Loveless stands out in the sewage treatment sector for its comprehensive range of advanced wastewater technologies, including packaged treatment plants, membrane bioreactors (MBR), fixed‑film and extended aeration systems, grit removal equipment, and integrated pumping solutions. The company’s products emphasize energy efficiency, long‑life performance, and lower life‑cycle costs, while supporting stringent environmental standards and operational flexibility. With proprietary innovations such as the TITAN MBR™ and S&L FAST® biological systems, Smith & Loveless delivers high‑quality effluent and reliable operations for diverse applications — from small communities to large industrial facilities — backed by global service and support networks.
Establishment: 1946
Headquarters: Lenexa, Kansas, United States
Main Products:
Company Profile:
Orenco Systems, Inc. is a U.S.‑based wastewater systems manufacturer and solutions provider known for its innovation in decentralized sewage treatment technology. Founded in 1982, Orenco has pioneered advanced treatment systems that support flexible, efficient wastewater management for residential, commercial, and community applications. With a focus on sustainable design and performance, Orenco’s products are widely adopted in North America and increasingly recognized in global wastewater markets for delivering reliable effluent quality and operational excellence.
Orenco’s strength in the sewage treatment industry lies in its development of decentralized and modular wastewater treatment solutions that optimize cost, space, and energy usage. The company’s proprietary AdvanTex® Treatment Systems use textile filter media to provide advanced biological treatment in compact footprints, making them ideal for sites where centralized treatment is impractical. Orenco also offers a range of septic‑to‑treatment upgrades, effluent quality monitoring tools, and system components that enhance long‑term performance and compliance with stringent discharge standards. This focus on innovation, sustainability, and flexibility positions Orenco as a leading choice for efficient, dependable sewage treatment solutions across diverse project scales.
Establishment: 1982
Headquarters: Sutherlin, Oregon, United States
Main Products:
Choosing the right sewage treatment plant manufacturer is crucial for ensuring long-term performance, operational efficiency, and cost-effectiveness. By understanding the capabilities, technologies, and global presence of these top companies, stakeholders can make informed decisions that support sustainable wastewater management.
For those seeking a trusted partner in sewage treatment solutions, Henan Weilan Water Treatment Technology Co., Ltd. stands out with its strong technical capabilities, extensive project experience, and commitment to delivering high-quality, customized systems. With over 200 successful projects worldwide and a focus on customer satisfaction, Weilan provides reliable and efficient solutions for all types of wastewater treatment needs.
Your Name*
Your Email*
Discover the 2025 Sewage Treatment Plant price guide, technologies, hidden costs, and expert buying tips. Get accurate quotes from Weilai today
Discover the definitive list of the Top 10 Sewage Treatment Plant Manufacturers in China for 2025. This guide covers leading suppliers of municipal infrastructure, packaged systems, and advanced process technologies—including MBR, Lamella Settlers, and Denitrification Filters.
