Known as the “Energy Capital of the World,” Houston, Texas, is home to a wide range of environmental companies that deal with sustainability, energy innovation, and ecological issues. These businesses include significant oil and gas enterprises with expanding environmental portfolios, environmental consulting organisations, and pioneers in renewable energy.
Table of Contents
Environmental Companies in Houston
An extensive examination of 15 renowned Houston-based environmental firms is provided below, along with information on their offerings and contributions to energy transition and environmental management.
- RSB Environmental
- PEI (Process Environmental International)
- Environmental Performance, Inc. (EPI)
- Environmental Consultants International, LLC (ECI)
- Vertex
- NSSI
- Sage Geosystems
- Calpine Corporation
- Base Power
- Solrite Energy
- Sonnen Inc.
- Lagoon Development Company
- Engine No. 1
- ExxonMobil
- Chevron
1. RSB Environmental
With its headquarters located in Houston, RSB Environmental is a prominent environmental engineering and consulting organisation that specialises in regulatory compliance and turnkey environmental solutions. With more than ten years of experience, RSB provides services to the manufacturing, petrochemical, energy, and refining sectors.
Soil and groundwater remediation, construction management, Phase I and Phase II Environmental Site Assessments (ESAs), and Property Condition Assessments (PCAs) are among their offerings. By providing experience in Tier II reporting, air quality management, stormwater compliance, wastewater management, and hazardous waste permitting, they help support regulatory compliance.
With a focus on risk mitigation and operational effectiveness, RSB, which has been certified by the City of Houston as a Minority Business Enterprise (MBE) and Small Business Enterprise (SBE), assists clients in avoiding fines and legal problems while upholding environmental responsibility.
2. PEI (Process Environmental International)
Process Environmental International (PEI) is a Houston-based company that specialises in environmental engineering and process optimisation for industrial clients. PEI offers waste management, water treatment, and air pollution control solutions.
Their services include the design and installation of systems such as wastewater treatment plants, filtration units, and scrubbers that are intended to lower industrial emissions and guarantee adherence to environmental laws.
To help clients reduce their environmental impact and maximise operational performance, PEI also provides process efficiency advice. Their knowledge is especially useful in the manufacturing and energy industries, where they help close the gap between sustainability and productivity.
3. Environmental Performance, Inc. (EPI)
Environmental Performance, Inc. (EPI) is a real estate-related environmental consultancy organisation that was founded in 1995. EPI, a Houston-based company, provides a wide range of services, such as closure planning, site remediation, and Phase I and II ESAs.
They help customers—like lenders, investors, and real estate developers—identify and reduce environmental risks related to real estate transactions. The work of EPI guarantees that properties are safe for development or sale and satisfy regulatory requirements.
They are a reliable partner for environmental risk management and due diligence in real estate because of their extensive knowledge of Texas’s complicated regulatory environment.
4. Environmental Consultants International, LLC (ECI)
Specialised environmental consulting services with an emphasis on sustainability, remediation, and compliance are offered by Environmental Consultants International, LLC. (ECI). ECI is a Houston-based company that works with a range of clients in the construction, oil and gas, and municipal sectors.
They provide ecological assessments, hazardous waste management, environmental permitting, and spill response preparation. ECI also manages stormwater and monitors air quality, making sure its clients follow state and federal laws.
They are a major force in Houston’s environmental consulting market because of their customised strategy, which assists companies in navigating environmental issues while encouraging sustainable practices.
5. Vertex
Offering forensic consulting, engineering design, construction management, and environmental services, The Vertex Companies, LLC is a multinational company with a significant presence in Houston.
For both commercial and industrial clients, Vertex’s environmental section specialises in site evaluations, cleanup, and regulatory compliance. They offer solutions for environmental due diligence in real estate transactions, asbestos and lead abatement, and contaminated site cleaning.
With a dedication to sustainability and safety, Vertex’s multidisciplinary approach combines technical and environmental skills, enabling them to handle complicated projects ranging from environmental restoration to infrastructure development.
6. NSSI (Nuclear Sources & Services, Inc.)
NSSI, which has been headquartered in Houston since 1971, focuses on environmental services associated with hazardous and radioactive waste as well as radioactive tracer elements. They mainly serve customers in the energy, industrial, and research sectors with their key services, which include waste characterisation, disposal, and remediation.
Chemical tracers used in industrial operations and environmental monitoring are produced by NSSI. The NSSI assists clients in the responsible management of radioactive materials by providing expertise in waste transportation, decontamination, and decommissioning, with an emphasis on safety and regulatory compliance.
In Houston’s energy-driven economy, where radioactive materials are used in exploration and production, their specialised skills are essential.
7. Sage Geosystems
Geothermal energy solutions are being advanced by Sage Geosystems, a creative Houston-based business. Sage creates technology to capture geothermal energy from a wider variety of geological settings than typical geothermal companies that depend on volcanic regions.
They provide carbon sequestration assistance, improved geothermal systems, and subsurface energy storage. With the help of Houston’s subsurface engineering experience (from the oil and gas industry), Sage hopes to offer low-carbon, scalable energy options. By providing sustainable power generation and storage options to lessen dependency on fossil fuels, their work aids in the energy transition.
8. Calpine Corporation
One of the biggest producers of energy in America, Calpine Corporation, is based in Houston and uses geothermal and natural gas resources. Calpine generates around 26,000 MW of capacity from 76 power facilities spread across 22 states.
High-efficiency gas-fired facilities and huge investments in geothermal energy, particularly at the Geysers in California—the largest geothermal facility in the world—are examples of their environmental concern. Calpine supports the Paris Agreement and carbon price as examples of decarbonization activities. Their offerings combine a dedication to cleaner, more sustainable power generating with conventional energy production.
9. Base Power
Based in Houston, Base Power is an energy company that specialises in distributed energy solutions for businesses and industries. In order to improve energy resilience and lower carbon emissions, they develop and implement modular power solutions, such as microgrids, solar, and battery storage.
Installation, upkeep, and optimisation of energy systems are among Base Electricity’s services, which provide customers with dependable electricity that is not dependent on conventional grids. Their creative strategy supports Houston’s drive for sustainable and decentralised energy and serves companies looking for affordable, environmentally friendly options.
10. Solrite Energy
Houston-based Solrite Energy is an expert in providing solar energy solutions to both residential and commercial customers. To lower electricity prices and encourage the use of renewable energy, they offer services including solar panel installation, energy storage systems, and maintenance.
Solrite places a strong emphasis on creating unique solar designs to satisfy particular customer demands and optimise efficiency. Solrite helps consumers achieve energy independence while reducing their environmental effect by making solar power accessible and cheap, which is part of Houston’s expanding renewable energy sector and aids in the city’s energy transition.
11. Sonnen Inc.
A pioneer in energy storage and intelligent energy management solutions, Sonnen Inc. is based in Houston. Sonnen, a German firm at first, specialises in combining solar energy with battery storage to provide environmentally friendly home energy solutions in the United States.
Designing, setting up, and maintaining energy storage systems that maximise the usage of renewable energy sources and offer backup power are among their services. By lowering dependency on fossil fuels and promoting grid stability, Sonnen’s technology establishes itself as a major participant in Houston’s sustainable energy ecosystem.
12. Lagoon Development Company
Lagoon Development Company integrates environmental factors into large-scale projects and specialises in sustainable real estate development in Houston. They are mostly a developer, but they also offer environmental services like green infrastructure design, wetland protection, and stormwater management.
With elements like energy-efficient buildings and renewable energy systems, they try to reduce ecological disturbance in developments like master-planned communities. Lagoon’s strategy is in line with Houston’s emerging trend of combining environmental conservation with urban growth.
13. Engine No. 1
An investment company based in Houston, Engine No. 1 is well-known for emphasising environmentally conscious and sustainable energy investing. In contrast to conventional environmental enterprises, Engine No. 1 uses shareholder activism to influence corporate behaviour and encourage businesses, especially those in the energy sector, to implement greener practices.
Among its offerings are investments in clean technology and renewable energy projects, as well as strategic advising. They use Houston’s energy know-how to propel decarbonization initiatives, particularly persuading big corporations like ExxonMobil to put sustainability first.
14. ExxonMobil
With a market valuation of more than $474 billion as of early 2025, ExxonMobil, a Houston-based oil and gas behemoth, is among the biggest energy corporations in the world. ExxonMobil has diversified into environmental projects, such as carbon capture and storage (CCS), hydrogen production, and biofuels, despite its historical reliance on fossil fuels.
With an increasing focus on emission reduction, their services cover exploration, production, refining, and chemical manufacturing. ExxonMobil’s commitment to greener energy solutions, which balances legacy operations with sustainability goals, is demonstrated by its participation in Houston’s CCS consortium, which aims to collect 100 million metric tons of CO2 by 2040.
15. Chevron
Chevron, another energy behemoth with its headquarters in Houston, works in the upstream and downstream oil and gas industries while developing environmentally friendly technologies. Chevron’s services include the production of natural gas and crude oil, refining, and chemical manufacturing. As of 2025, the company’s market capitalisation was $278 billion.
With a goal of 300,000 barrels of oil equivalent per day in the Gulf of Mexico by 2026, its environmental initiatives concentrate on CCS, renewable fuels, and increased oil recovery by water injection. Together with investments in low-carbon solutions, Chevron’s Permian Basin output reached 900,000 barrels per day in 2024, demonstrating its dual commitment to environmental responsibility and energy supply.
Conclusion
Houston’s diverse natural landscape is exemplified by these 15 companies. In order to ensure that industries follow regulatory standards, consulting organisations such as RSB, PEI, EPI, ECI, and Vertex offer vital compliance, remediation, and risk management services.
While renewable energy companies like Solrite, Sonnen, and Base Power are propelling the transition to cleaner power, specialised businesses like NSSI and Sage Geosystems tackle particular issues like radioactive waste and geothermal energy, respectively.
Developers like Lagoon include environmental design in urban development, and Calpine connects conventional and renewable energy. While ExxonMobil and Chevron, despite their origins in fossil fuels, make significant investments in decarbonization technology like CCS, Engine No. 1 has an impact on corporate sustainability.
Collectively, these businesses demonstrate Houston’s transformation from an oil-focused centre to a pioneer in the worldwide energy revolution, striking a balance between environmental innovation and economic vitality.
Houston is a key actor in creating a low-carbon world because of its services, which range from site inspections to the implementation of renewable energy. These services address both legacy challenges and future sustainability aspirations.
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A passion-driven environmentalist by heart. Lead content writer at EnvironmentGo.
I strive to educate the public about the environment and its problems.
It has always been about nature, we ought to protect not destroy.