The sewage treatment plant construction industry in the US plays a vital role in maintaining public health and environmental sustainability. Companies in this sector range from specialized engineering firms to large-scale construction giants, all focused on creating efficient and advanced wastewater management solutions. Recent trends emphasize the adoption of innovative technologies and sustainable practices, with an increasing push towards renewable energy integration and decentralized systems. As regulations become more stringent and funding opportunities grow, the industry is poised for significant expansion, seeking to address aging infrastructure and rising population demands. Collaboration between public agencies and private investors is crucial for future development.


This list highlights a range of investors active in sewage treatment plant construction, including venture capital firms and private equity companies. Operating predominantly from key financial hubs like New York and Washington, D.C., many of these firms were founded in the late 20th century. They range in size from small teams to large institutions, with varying levels of investment activity in 2024. Collectively, these investors completed numerous deals, showcasing their commitment to sustainable infrastructure and environmental stewardship, which are vital for advancing the sewage treatment sector.


Top 18 Sewage Treatment Plant Construction Investors in the US


1. U.S. Department of Energy (DOE)

  • Website: energy.gov
  • Type: Corporate
  • Headquarters: Washington, D.C., District Of Columbia, United States (USA)
  • Founded year: 1977
  • Headcount: 10001+
  • Number of deals in 2024: 597
  • LinkedIn: u-s--department-of-energy

The U.S. Department of Energy (DOE) is a public entity established in 1977, responsible for overseeing national energy policy, energy production, and nuclear power research. It serves various stakeholders, including government entities and the public, by providing guidance on energy efficiency, funding opportunities, and conducting research to address energy challenges. In recent years, the DOE has been active in providing grants to organizations involved in water treatment and sewage management. For instance, the Coastside County Water District received a $300,000 grant in October 2023, and the Atlantic County Utilities Authority was awarded $1,380,000 in June 2024. Other notable transactions include grants to Membrion ($3,150,000) and ZwitterCo ($1,250,000), both of which are involved in innovative water treatment technologies. These transactions highlight the DOE's commitment to supporting projects that enhance water treatment capabilities, making it a relevant investor in the sewage treatment plant construction sector.


2. Kkr

  • Website: kkr.com
  • Type: Private Equity
  • Headquarters: New York, New York, United States (USA)
  • Founded year: 1976
  • Headcount: 1001-5000
  • Number of deals in 2024: 74
  • LinkedIn: kkr

KKR & Co. Inc. is a prominent investment firm based in New York, specializing in private equity, credit, infrastructure, and real estate. Founded in 1976, KKR provides asset management solutions to institutional investors and individual clients, helping them navigate complex investment landscapes. The firm has a global reach and leverages its extensive expertise to support its clients' investment needs. Notably, KKR has made significant investments in the water treatment sector, including a $1.5 billion acquisition of Singapore-based United Envirotech, which focuses on water and wastewater treatment. Additionally, KKR acquired a 25% stake in Northumbrian Water Group Limited for approximately £870 million, further emphasizing their commitment to the water industry. These transactions highlight KKR's strategic interest in the sewage treatment sector, making them a relevant investor in this field.


3. IFC - International Finance Corporation

  • Website: ifc.org
  • Type: Venture Capital
  • Headquarters: Washington, D.C., District Of Columbia, United States (USA)
  • Founded year: 1956
  • Headcount: 1001-5000
  • Number of deals in 2024: 107
  • LinkedIn: ifclinkedin

The International Finance Corporation (IFC) is a not-for-profit organization established in 1956, focused on private sector development in emerging markets. Based in Washington, D.C., the IFC provides investment, advisory, and asset management services to businesses and financial institutions, helping them access capital and expertise to foster economic growth. The IFC operates in over 100 countries, addressing challenges of poverty and promoting sustainable development. Notably, the IFC has been involved in significant transactions within the sewage treatment sector, particularly with Organica Water, a provider of innovative wastewater treatment solutions. The IFC led multiple funding rounds for Organica, including a Series B round aimed at financing global expansion and the launch of a new wastewater treatment plant design platform. This involvement highlights the IFC's commitment to supporting sustainable water management initiatives and its role as a key player in the sewage treatment plant construction industry.


4. Bowman Consulting

  • Website: bowman.com
  • Type: Corporate
  • Headquarters: Reston, Virginia, United States (USA)
  • Founded year: 1995
  • Headcount: 1001-5000
  • Number of deals in 2024: 8
  • LinkedIn: bowman-consulting

Bowman Consulting Group Ltd. is an engineering and consulting firm based in Reston, Virginia, founded in 1995. The firm provides a wide range of services, including civil/site engineering, transportation engineering, and environmental consulting, catering to both government agencies and private sector companies. In 2024, Bowman Consulting has made significant strides in expanding its capabilities in the water and wastewater sector, highlighted by their acquisition of Element Engineering LLC, a firm specializing in civil, water, and wastewater engineering services. This acquisition is expected to enhance Bowman's national water-wastewater practice and expand their presence in Colorado, contributing approximately $4 million in annualized net service billing. Additionally, their acquisition of Trudell Consulting Engineers, which operates in a multi-disciplinary engineering capacity, further strengthens their portfolio in relevant engineering services. Bowman's strategic acquisitions reflect their commitment to infrastructure projects, including sewage treatment plant construction, making them a relevant player in this industry.


5. Blackstone

  • Website: blackstone.com
  • Type: Private Equity
  • Headquarters: New York, New York, United States (USA)
  • Founded year: 1985
  • Headcount: 1001-5000
  • Number of deals in 2024: 57
  • LinkedIn: blackstonegroup

Blackstone Inc. is a prominent investment management firm based in New York, specializing in alternative investments across various sectors, including private equity, real estate, and credit solutions. Founded in 1985, Blackstone has built a reputation for delivering lasting value through its extensive portfolio and investment strategies. Notably, Blackstone has made significant investments in companies relevant to the sewage treatment and environmental engineering sectors. For example, their acquisition of Geosyntec Consultants for $380 million highlights their commitment to environmental engineering services, which are crucial for sewage treatment projects. Additionally, their investment in Nagarjuna Construction Company Limited, which focuses on public-private infrastructure projects, further emphasizes their involvement in sectors that may include sewage treatment plant construction. Other investments, such as those in Atlas Technical Consultants and Salas O’Brien, also reflect their interest in engineering and technical services that could support sewage treatment initiatives.


6. Y Combinator

  • Website: ycombinator.com
  • Type: Venture Capital
  • Headquarters: San Francisco, California, United States (USA)
  • Founded year: 2005
  • Headcount: 51-200
  • Number of deals in 2024: 802
  • LinkedIn: y-combinator

Y Combinator is a prominent startup accelerator and venture capital firm based in San Francisco, California, founded in 2005. It specializes in providing funding and mentorship to early-stage technology companies, having successfully launched over 4,000 startups. Among its diverse portfolio, Y Combinator has made notable investments in companies related to water and wastewater management, such as Biobot Analytics, which raised $6.7 million in seed funding to expand its operations in wastewater epidemiology. This investment highlights Y Combinator's engagement in sectors that intersect with sewage treatment, despite its primary focus on technology startups. Other relevant transactions include earlier seed investments in Biobot Analytics and smaller investments in companies like Valor Water Analytics and NODE, which also relate to water management and analytics.


7. EMCOR Group, Inc.

  • Website: emcorgroup.com
  • Type: Corporate
  • Headquarters: Norwalk, Connecticut, United States (USA)
  • Founded year: 1994
  • Headcount: 10001+
  • LinkedIn: emcor-group-inc

EMCOR Group, Inc. is a prominent construction services company based in Norwalk, Connecticut, specializing in mechanical and electrical construction, industrial services, and energy infrastructure. Founded in 1994, the company operates through a network of over 100 subsidiaries across the United States, serving a diverse clientele that includes both businesses and government entities. EMCOR is committed to sustainability and innovation in its operations. Notably, EMCOR has made several strategic acquisitions that enhance its capabilities in infrastructure projects. For instance, the acquisition of Harry Pepper & Associates, a company focused on government infrastructure projects, suggests EMCOR's interest in expanding its footprint in sectors that may include sewage treatment. Additionally, their acquisition of RepconStrickland and Bahnson Holdings further demonstrates their capacity to handle large-scale construction projects, which could encompass sewage treatment facilities. With a strong emphasis on mechanical contracting and industrial services, EMCOR Group, Inc. is well-positioned to engage in sewage treatment plant construction projects.


8. Nv5

  • Website: nv5.com
  • Type: Corporate
  • Headquarters: Hollywood, Florida, United States (USA)
  • Founded year: 1947
  • Headcount: 1001-5000
  • Number of deals in 2024: 10
  • LinkedIn: nv5

NV5 is a consulting and engineering company based in Hollywood, Florida, founded in 1947. The firm provides technology, conformity assessment, and consulting solutions for infrastructure, utility, and building systems, serving both public and private sector clients. With over 100 offices, NV5 offers a wide range of services, including environmental consulting, geospatial solutions, and construction quality assurance. Notably, NV5 has made several strategic acquisitions to enhance its capabilities in relevant sectors. For instance, the acquisition of PES Environmental in May 2021 indicates a commitment to environmental services, which are crucial for sewage treatment projects. Additionally, the acquisition of CHW Professional Consultants in January 2024 aims to bolster their engineering capabilities in Florida, potentially expanding their involvement in sewage treatment plant construction. These transactions highlight NV5's strategic positioning in sectors that intersect with sewage treatment, making them a relevant player in this industry.


9. Tetra Tech

  • Website: tetratech.com
  • Type: Corporate
  • Headquarters: Pasadena, California, United States (USA)
  • Founded year: 1966
  • Headcount: 10001+
  • Number of deals in 2024: 2
  • LinkedIn: tetra-tech

Tetra Tech, Inc. is a leading consulting and engineering firm based in Pasadena, California, specializing in water management, environmental services, and sustainable infrastructure solutions. Founded in 1966, Tetra Tech serves both government and commercial clients, leveraging advanced technologies and local knowledge to deliver innovative solutions to complex challenges in resource management and compliance. The firm has been actively involved in various acquisitions that enhance its capabilities in environmental engineering, such as the acquisition of Cornerstone Environmental Group, which focuses on solid waste markets, and Piteau Associates Engineering, which may contribute to their water management expertise. These transactions indicate Tetra Tech's commitment to expanding its service offerings in areas that are relevant to sewage treatment plant construction, making them a significant player in this sector.


10. US Environmental Protection Agency (EPA)

  • Website: epa.gov
  • Type: Corporate
  • Headquarters: Washington, D.C., District Of Columbia, United States (USA)
  • Founded year: 1970
  • Headcount: 10001+
  • Number of deals in 2024: 54
  • LinkedIn: us-epa

The US Environmental Protection Agency (EPA) is a public entity established in 1970, focused on environmental protection and regulatory compliance. It serves state and local governments, businesses, and the public, ensuring adherence to environmental laws and promoting sustainable practices. In 2024, the EPA has been involved in several significant transactions, primarily in the form of grants aimed at enhancing environmental infrastructure. Notably, the EPA provided a grant of $1,800,000 to the Los Angeles County Sanitation Districts on July 7, 2023, and a $4,000,000 grant to Oldcastle Infrastructure on July 16, 2024. Other transactions include grants to LeapFrog Design, Onvector, and Aquagga, Inc., all of which contribute to projects that may involve sewage treatment and related environmental improvements. These activities demonstrate the EPA's commitment to supporting initiatives that align with sewage treatment plant construction and environmental sustainability.


11. MassVentures

  • Website: mass-ventures.com
  • Type: Venture Capital
  • Headquarters: Waltham, Massachusetts, United States (USA)
  • Founded year: 1978
  • Headcount: 1-10
  • Number of deals in 2024: 28
  • LinkedIn: massventures

MassVentures is a venture studio based in Waltham, Massachusetts, founded in 1978, that supports early-stage companies focusing on deep tech innovation. The firm offers a range of funding options, including venture capital and grants, alongside business guidance and accelerator programs. Notably, MassVentures has participated in funding rounds for companies like Aclarity, which has developed a sustainable solution for eradicating PFAS contaminants, a significant issue in water treatment. In addition to Aclarity, MassVentures has provided grants to Cambrian Innovation and ZwitterCo, both of which are involved in innovative water treatment solutions. This involvement highlights MassVentures' commitment to advancing technologies that can impact sewage treatment and water quality management.


12. Morgan Stanley

  • Website: morganstanley.com
  • Type: Venture Capital
  • Headquarters: New York, New York, United States (USA)
  • Founded year: 1986
  • Headcount: 10001+
  • Number of deals in 2024: 79
  • LinkedIn: morgan-stanley

Morgan Stanley is a prominent investment bank and financial services firm founded in 1986, headquartered in New York, New York. With a workforce exceeding 10,000, the firm provides a wide range of services including wealth management, investment banking, and capital markets. Morgan Stanley has a global presence and leverages its expertise to offer tailored financial solutions to individuals, families, corporations, and governments. Notably, Morgan Stanley Capital Partners acquired Apex Companies, a provider of environmental consulting and engineering solutions, indicating their interest in environmental sectors. Furthermore, Morgan Stanley Infrastructure Partners acquired Seven Seas Water Group, a leader in Water-as-a-Service solutions, showcasing their commitment to water infrastructure, which is integral to sewage treatment. Their investment in XRI Holdings, a water supply and pipeline transportation company, further emphasizes their engagement in water-related projects. These transactions highlight Morgan Stanley's active role in sectors that are relevant to sewage treatment plant construction.


13. DXP Enterprises, Inc.

  • Website: dxpe.com
  • Type: Corporate
  • Headquarters: Houston, Texas, United States (USA)
  • Founded year: 1908
  • Headcount: 1001-5000
  • Number of deals in 2024: 6
  • LinkedIn: dxp-enterprises-inc-

DXP Enterprises, Inc. is a corporate investor based in Houston, Texas, founded in 1908. The company operates as an industrial distributor, providing a wide range of products and services across various sectors, including manufacturing, oil and gas, and renewable energy. Recently, DXP has been actively expanding its footprint in the water treatment market through strategic acquisitions. Notably, they acquired Hartwell Environmental Corporation, a manufacturer’s representative focused on the water and wastewater industry, and Sullivan Environmental Technologies Inc., which also specializes in water and wastewater solutions. These acquisitions, along with others like Riordan Materials Corporation and Kappe Associates, demonstrate DXP's commitment to enhancing its capabilities in the water treatment sector, making it a relevant player in sewage treatment plant construction.


14. Elemental Impact


Elemental Impact is a not-for-profit organization based in Honolulu, Hawaii, founded in 2012. Their primary focus is on scaling climate technologies that have a significant community impact. They provide funding opportunities, community engagement strategies, and educational resources to support climate technology companies and local governments in deploying sustainable solutions. In recent transactions, Elemental Impact has been involved in funding rounds for companies like Cambrian Innovation and Microvi Biotechnologies, which are engaged in innovative wastewater treatment solutions. Notably, they led a seed round for DigitalPaani, a company that plans to use its funds to expand its technology to more wastewater treatment plants across India, highlighting Elemental Impact's commitment to enhancing sewage treatment capabilities.


15. Oaktree Capital Management, L.P.


Oaktree Capital Management, L.P. is a prominent private equity firm based in Los Angeles, California, specializing in alternative investment strategies. Founded in 1995, the firm manages a diverse range of investment products, including credit, private equity, real estate, and listed equities, primarily serving institutional investors and high-net-worth individuals. Oaktree is known for its commitment to delivering superior investment results while managing risk through in-depth research. Notably, Oaktree has made significant investments in the water treatment sector, including the acquisition of Aqseptence Group, which specializes in water treatment and liquid/solid separation technologies. This acquisition highlights Oaktree's strategic interest in the water treatment industry, which is integral to sewage treatment plant construction. Additionally, their acquisition of MWH Constructors, a company focused on construction and engineering services, further emphasizes their involvement in infrastructure projects relevant to sewage treatment. These transactions illustrate Oaktree's active role in sectors that intersect with sewage treatment plant construction, reinforcing their relevance in this category.


16. American Water

  • Website: amwater.com
  • Type: Corporate
  • Headquarters: Camden, New Jersey, United States (USA)
  • Founded year: 1886
  • Headcount: 5001-10000
  • Number of deals in 2024: 34
  • LinkedIn: american-water

American Water, founded in 1886 and headquartered in Camden, New Jersey, is the largest investor-owned water and wastewater utility company in the United States, serving approximately 3.4 million customers. The company focuses on providing clean and safe water supply while managing wastewater treatment services for residential, commercial, and governmental clients. In recent years, American Water has made several strategic acquisitions to enhance its wastewater management capabilities. Notably, in November 2024, Illinois American Water acquired the wastewater system of the Metro East Sanitary District for $8.4 million, adding approximately 5,600 customers to its service area. Additionally, the acquisition of Environmental Management Corporation in 2009 further solidified their position in the wastewater sector. These transactions demonstrate American Water's commitment to expanding its infrastructure and services in the sewage treatment domain, emphasizing their role in community support and environmental stewardship.


17. Sun Capital Partners, Inc.

  • Website: suncappart.com
  • Type: Private Equity
  • Headquarters: Boca Raton, Florida, United States (USA)
  • Founded year: 1995
  • Headcount: 51-200
  • Number of deals in 2024: 1
  • LinkedIn: sun-capital-partners

Sun Capital Partners, Inc. is a private equity firm based in Boca Raton, Florida, founded in 1995. The firm specializes in operationally driven investments, focusing on enhancing the efficiency and growth of businesses across various sectors, including food, consumer, and industrials. Notably, Sun Capital has made strategic acquisitions in the environmental and infrastructure sectors, such as the acquisition of Environmental Infrastructure Solutions, which provides environmental and infrastructure services. This acquisition aligns with the sewage treatment plant construction industry, as it involves environmental infrastructure. Additionally, their acquisition of Andersen Commercial Plumbing indicates a focus on plumbing services, which are integral to sewage treatment systems. Sun Capital's approach involves partnering with management teams to optimize operations and drive sustainable growth, which could be beneficial in the context of sewage treatment projects.


18. Bernhard Capital Partners


Bernhard Capital Partners is a private equity management firm based in Baton Rouge, Louisiana, founded in 2013. The firm specializes in investment management and private equity services, focusing on acquiring, operating, and growing businesses in the services and infrastructure sectors. Notably, they acquired Ascension Wastewater Treatment, a private sewer utility operator in Louisiana, in April 2020, aiming to enhance sewer infrastructure and service delivery. Additionally, they have made other acquisitions, such as Brown & Root Industrial Services and United Utility, which further solidify their presence in the infrastructure domain. Their strategic investments reflect a commitment to improving operational capabilities and service delivery in essential sectors, including sewage treatment.



Sewage Treatment Plant Construction Insights: Key Investors in the US


InvestorHeadquarterSizeFoundedDeals 2024
U.S. Department of Energy (DOE)Washington, D.C., District Of Columbia, United States (USA)10001+1977597
KkrNew York, New York, United States (USA)1001-5000197674
IFC - International Finance CorporationWashington, D.C., District Of Columbia, United States (USA)1001-50001956107
Bowman ConsultingReston, Virginia, United States (USA)1001-500019958
BlackstoneNew York, New York, United States (USA)1001-5000198557
Y CombinatorSan Francisco, California, United States (USA)51-2002005802
EMCOR Group, Inc.Norwalk, Connecticut, United States (USA)10001+19940
Nv5Hollywood, Florida, United States (USA)1001-5000194710
Tetra TechPasadena, California, United States (USA)10001+19662
US Environmental Protection Agency (EPA)Washington, D.C., District Of Columbia, United States (USA)10001+197054
MassVenturesWaltham, Massachusetts, United States (USA)1-10197828
Morgan StanleyNew York, New York, United States (USA)10001+198679
DXP Enterprises, Inc.Houston, Texas, United States (USA)1001-500019086
Elemental ImpactHonolulu, Hawaii, United States (USA)51-200201219
Oaktree Capital Management, L.P.Los Angeles, California, United States (USA)1001-5000199520
American WaterCamden, New Jersey, United States (USA)5001-10000188634
Sun Capital Partners, Inc.Boca Raton, Florida, United States (USA)51-20019951
Bernhard Capital PartnersBaton Rouge, Louisiana, United States (USA)11-5020135


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