Air Water Earth (AWE) Ltd.
An environmental engineering firm in Uganda that provides a unique blend of three core services: consulting, pollution control equipment, testing and monitoring for environmental problems.

Apex Companies, LLC
a national environmental, health & safety, and engineering firm offering a broad range of wastewater and potable-water solutions, including wastewater treatment management, design and construction, to comprehensive operations and maintenance services.

Aquachem Enviro Engineers Pvt. Ltd.
ISO 9001-2000 Indian company offering complete services in environmental field from air and water, quality monitoring to system design to execution and commissioning.

ARM Ltd.
One of the leading, natural, reed-bed wastewater treatment design and construction companies in the UK.

ART Engineering, LLC
Providing turnkey process design, plant engineering, construction and startup services for ground water or wastewater treatment systems.

Aureus Solutions Inc.
Focusing on management and operations training (water and wastewater optimization) to increase plant efficiency and capacity using current infrastructure, often averting costly water and wastewater plant upgrades.

Avanti Trading and Rental
Dutch firm specializing in engineering, manufacturing, trading and rental of all kinds of equipment that is used for industrial cleaning.

Bartlett & West Engineers, Inc.
A full service engineering company since 1951, serving the central US states.

Bene Terra, LLC
Specialists in the beneficial reuse of wastewater.  We provide wastewater managers with environmentally friendly, cost-effective alternatives to conventional wastewater treatment.

Biddle Consulting Ltd.
Specialists in process design and design management of water, wastewater and industrial effluent treatment plants - from feasibility to commissioning.  Services include HAZOP and DSEAR assessments for process and safety reviews.

BioChem Technology, Inc.
Providing process consulting to the biological wastewater industry.  We are experts at troubleshooting and optimizing industrial and municipal facilities.

Biocons
Biotreatment of complex effluents, containing persistent pollutants, waste gases and sludges. We offer innovative solutions with proven in plant-scale operation.

Boge & Boge
Since 1980, they have been providing consulting engineering services for the mining, agriculture, civil, structural and environmental fields.  Services include restoration engineering, forensic engineering, design and project management.

Boyle Engineering Corporation
Providing a full range of professional services to plan, design, and construct infrastructure projects.  Our expertise covers water resources, water treatment and distribution, sewerage and water reclamation, drainage and flood control.

Business Development Services
Market research & business consulting firm serving manufactures of chemical & equipment, suppliers of engineering services.  We specialize in water/waste water, air and hazardous waste markets. Also business to business research.

Chicago Chem Consultants Corporation
Providing process, environmental & safety services to the chemical & allied industries.  Services include: design, development & implementation of chemical & remediation projects, lab & pilot studies and other support activities.

Chubb Engineering
A consulting engineering firm providing inspection and design services for tanks, silos, filters and supporting structures.  Inspection services include underwater inspection, evaluation and ultrasonic testing.

Cook Prior Associates, Ltd.
Wastewater and water management consultants, including process development, optimization and commissioning.  We offer a full range of contract and regulatory compliance testing services.

Crowther Clayton Associates
Consultancy in water, wastewater and environmental protection technology, market research, problem solving, new technology evaluation and expert witness.

CSC Technology
Providing customized water and wastewater treatment programs, along with environmental engineering and plant operational services for the water and industrial wastewater market.

C. T. Male Associates
Offering architecture and building systems engineering, civil engineering, environmental services and survey and land information services.

Desludge LLC
Customized regulatory reports written from easily downloadable checklists for wastewater lagoon desludging and land application of biosolids: RFP, Sludge Management Plan, Preliminary and As-Applied 503 Reports.

DYK Prestressed Tanks
Designer and builder of prestressed concrete storage tanks.   Offering a wide selection of post-tension wall designs for varying storage and climatic conditions.  Cast-in-place, precast or shotcrete corewalls all built by DYK.

Earth-Water Technology International, Inc.
Exploration and development of deep, groundwater flow systems for private utilities and local governments that are embarking on privatization of their water supply sector.

Enhanced WAPP System (India) Private Ltd.
A leading environmental engineering company in water/wastewater treatment.  We have completed more than 100 projects with India's leading corporations.

Environ Strategy Consultants Inc.
Providing expertise in environmental engineering and remedial system construction, as well as wastewater and drinking water treatment construction.

EMA Services, Inc.
Specializing in IT and management consulting services for utilities for the past 25 years.

Environmental Leverage Inc.
Environmental water and wastewater treatment, municipal and industrial, consulting and engineering services.

Environmental Management Associates, LLC
Offering a complete range of environmental consulting services with specialization in assessments, site investigations and remediation.

Environmental Resource Center
Offering environmental consulting, training, software and products.  We also do EPA, OSHA and Dot audits and assessments.

EnviroSim Associates Ltd.
An environmental engineering company specializing in modeling and simulation of biological nutrient removal systems.  Developers of BioWin and PetWin simulation software for municipal and petrochem wastewater treatment systems.

Expertise Limited
Offering chemical and environmental engineering consulting specializing in water treatment.

GEA Engineering
Design and construction of water reuse facilities using membrane technologies including reverse osmosis, ultrafiltration and energy recovery.

Geotec Associates
Pioneered the use of geotextile tubes for dewatering fine grained dredged materials, sewage sludge, animal waste, alum sludge, fly ash and industrial waste.

Grupo FCH
Design and construction of water and wastewater treatment plants, hazardous and non-hazardous landfills, environmental/civil engineering, consulting and management.

H2O'C Engineering, LLC
Professional engineering firm specializing in municipal water and wastewater treatment. We conduct pilot plant evaluations, perform chemical and microbiological analyses, design facilities, and provide operator training.

Haling & Associates
Offering a comprehensive range of integrated services to assist clients in dealing with potential problems of waste treatment, remediation, and site closure..

Hall & Company
Listing jobs nationwide for engineering, architecture and environmental consulting firms.  We also provide an extensive job board, employment advertising and recruiting services.

Harris Group Inc.
A multidiscipline consulting engineering firm serving the water/wastewater, pulp and paper, energy, transportation, pharmaceuticals & biopharmaceuticals, and alternate fuels industries.

Hazen & Sawyer, PC
Providing consulting services in environmental engineering and science to the public and private sectors.  Specialized consulting in water treatment, water resources, water pollution control and environmental evaluations.

Heath Consultants Ltd.
Field engineering, product, service and training company specializing in gas leak, water leak, water flow, sewer flow and water sampling services.

HERWIT Engineering
Our design expertise includes pump stations, complete wastewater treatment systems, solids handling systems including digestion, dewatering, and drying, aeration system design, cogeneration system design and energy optimization analysis.

HDR Engineering
Offering environmental management systems, permitting and compliance auditing, environmental impact statements, industrial and municipal construction.

Highlander Environmental Corp.
Providing consulting services and regulatory assistance to the petroleum industry since 1968.

Hill County Aerobic Design Works
On-site sewage facility design, site and soil evaluations and fresh water biology consultations.

Hitech International Ltd.
Consultants in water and wastewater technology. Services range from start-up commissioning and trouble shooting to complete design and supply.

Hydromantis Inc.
Developer of GPS-X software for the modeling and simulation of wastewater treatment plants, both industrial and municipal.  Over 500 process models included or add your own models.  Our program is dynamic and interactive.

Hydro Science Engineers, Inc.
A civil engineering firm specializing in water, wastewater and recycled water facilities, design, planning and construction.

iConsult Group
Providing engineering services for problems involving water hammer in sewer & waterworks, transient analysis, protection recommendation, simulation and modeling of systems.

Industrial Services Company
Providing the food processing, manufacturing and municipal markets with quality environmental construction services on a national basis.  Wastewater and water treatment plant installation and upgrades.  Environmental design-build services.

Infraburo (Pty) Ltd.
A consulting engineering firm specializing in the planning, design and construction of infrastructure services such as roads, storm water, water and sewers for both rural and urban environments.

Innovas GbR
An engineering company engaged in the field of anaerobic and biogas systems for industrial or municipal organic waste, wastewater, production residues from distillers, breweries and dairies.

Integrated Engineers, Inc.
Wastewater experts providing consulting, equipment, and chemicals to the industrial market. Manufacturer of Floccin products used to remove oil & grease, BOD, TSS and heavy metals.

International Microbial Associates
Independent microbiological consulting for the pulp & paper industry.  Offering problem solving, review of new engineering projects, program assessment, new product development, training and microscopy.

Kam Biotechnology Ontario
A world leader in bioremediation technology.  We offer site assessments, biological treatment of solid wastes and biological sludge reduction, as well as microbial wastewater treatment.

Klein and Hoffman
Since 1953, we have been providing wastewater management, structural, civil and restoration engineering services.

Life Source Engineering, Inc.
Providing water purification and waste water treatment equipment and systems.  Our systems are sized from house hold to small municipality.  Offering complete package design, installation, management, training and service.

Linnhoff March
Offering consultancy services and software to help our clients minimize fresh water and wastewater treatment costs by identifying optimal reuse, regeneration and treatment schemes.  Savings from 10% to 60%.

Living Machines Inc.
Providing "natural-systems" approach to wastewater and sewage treatment using principles of ecological design.  Offering innovative WWT facilities for communities, resorts, and industrial users.

Management and Operational Resources, LLC
Operator diagnostic evaluation and training, consulting and troubleshooting.

Masar Technologies, Inc.
Innovative RO/NF/UF/MF membrane fouling and performance monitoring software and services.  We also provide consulting services for membrane system design, operation, trouble shooting and operator training.

Michael Richard Wastewater Microbiology
A wastewater laboratory for the microscopic examination of activated sludge and other treatment processes for filamentous organism identification.

Miller Environmental, Inc.
Specializing in the operations and maintenance of water and wastewater treatment plants.

MVS Solutions
International consulting firm providing technical and chemistry assistance to business and government in the chemical, biotech, environmental and related industries.

National Environmental Services Agency
Established in 1989, NESA is a leading provider of high quality environmental consultancy services, delivering a comprehensive range of environmental services to clients on a confidential basis.

Patrick H. Kinghorn
Industrial, high-purity water treatment consulting services.

PRP Engineering, Inc.
Water and wastewater engineers for the design of pump stations, reservoirs, pipelines, sewers and related water-engineering projects.

PTI Consulting Engineers
Providing engineering services to industry for plant design and control systems design.  We also provide start-up and commissioning of plant mechanical and electrical systems.

Puckorius & Associates, Inc.
An independent industrial water treatment consulting firm.  Areas served include heating systems, cooling systems, co-generation, HVAC, water recycling, water reuse, bacteria prevention, and failure analysis.

Quality Environmental Technologies, Inc.
Handling all types of hazardous and non-hazardous waste water on a nation-wide basis. We also provides installations of all types of waste water and pre-treatment units.

Richard P. Arber Associates
Specializes in water, wastewater, and water reuse system design.

Richmond Engineering Works
Leaders in control systems engineering.  We are designers, engineers, consultants and systems integrators.  Offering custom-engineered control solutions for water and wastewater treatment applications around the world.

RS Hydro
Flow measurement consultants - ultrasonic flowmeter, open channel flow measurement for streams, rivers, sewers and partially full pipes from RS Hydro. Telemetry, datalogging, sales, hire and calibration.

SBR Technologies, Inc.
Global leader in environmental engineering consulting, specializing in providing biological wastewater treatment solutions.  We combine a university research background with proven experience.

Sheaffer International, LLC
An environmental consulting and engineering firm specializing in water and wastewater treatment systems and wastewater reuse systems.

Solids Handling Technologies
Consultants with 25 years of experience in solving bulk solids handling problems.  Providing material flow testing, evaluation of solids flow properties and bin/feeder designs.  Serving the chemical, food, plastics and pharmaceutical industries.

SSOE, Inc.
Engineers-Architects in the business of helping our customers achieve their business objectives through planning, design and construction with related services.   Our personnel offer innovative technology within a TQM environment.

Steger & Bizzell Engineering, Inc.
For more than thirty years, we have been a leader in the Central Texas consulting, engineering, and surveying community.

Tetra Tech, Inc.
A primary provider of management consulting and technical services for resource and infrastructure management.  We provide these services to a diverse base of private and public sector clients.

Thielsch Engineering
Offering engineering and laboratory services for the water and wastewater industries.  We specialize in corrosion and failure analysis.

Towerite Ltd.
Offering air and water environmental services including Legionella risk assessments, air quality monitoring, cooling tower, boiler and closed system chemical analysis and maintenance.

Trinity Engineering Testing Corp.
Providing inspection services for potable water storage tanks throughout Texas.

Wallace Group
A multi-discipline firm that provides civil engineering, construction management, mechanical engineering, planning, public works administration and water resources services.

Waterpro Environmental Ltd.
Scottish water management consultancy.

Water Works Global, Inc.
Manufacture of water treatment systems based on glow discharge.

Wock-Oliver Inc.
Offering package treatment plant engineering for effluent and sewage.

Woodruff & Howe Environmental Engineering
A full service environmental engineering consulting firm that specializes in planning, design and implementing effective solutions to your environmental and regulatory concerns.

Work Smart, Inc.
Providing ground-penetrating radar mapping services and hydro-vac excavation services.

Zach Integrated Solutions
A premier water and wastewater project solution provider.  We uniquely integrate engineering, operations and commissioning to deliver an optimum project outcome.

Zolal Iran Company
Design, procurement, construction, commissioning and operation of municipal/industrial, oil & gas, petrochemical & produced water & wastewater treatment plants.

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