Independent consultant firm in the treatment and management of water, environmental and chemical Products.

South Australia government organization offers a wide range of water and environmental health analytical and research services relating to water and the environment.

Consulting engineers offering services in water, wastewater, and related civil engineering areas. Illinois and Wisconsin.

Provides full-service consulting to industry and the legal community in hydrogeology, water supplies, contaminant transport, and litigation support.

An environmental consulting company specializing in lake and watershed management, water quality monitoring, geographic information systems, and environmental web design services based in Saranac Lake, NY.

Providing oceanographic consulting services including: research/survey vessels, geophysical surveys, sampling, wetland restoration, risk assessment, bioassessment, and licensed vessel captains. WBE. MA and NY.

Evan Hansen offers technical analyses on water quality and water resources matters, for watershed groups, environmental organizations, consulting companies, and government agencies. Describes projects and provides publications for download. Based in West Virginia, USA.

Consulting and research bureau based in France offers wastewater evaluation and treatment-design services to industry. Includes description of services and publications.

Engineering consultants for fluid transients (steam or waterhammer), water and wastewater systems, forensic and expert witness services, river and coastal engineering, water treatment plant hydraulics, and related regulatory compliance. Ontario, Canada.

Financial consultant specializing in storm water utility development.

Fee based rainwater harvesting, stormwater reuse, and rain garden design and consulting.

Small consultancy providing expertise in hydrology to solve problems in water resources such as water allocation issues, climate change impacts, land use changes and environmental issues. Specialists in hydrological modelling. Worldwide experience.

A rainwater harvesting and graywater recovery system design and consulting firm located in Austin, Texas.

Offers information and consultancy advice on integrated catchment (watershed) management, river basin management and integrated water resources management. Based in Australia.

Environmental/ecological consulting firm emphasizing coastal and aquatic habitats. Wetlands delineations, environmental impact assessment, soils and groundwater assessment, monitoring. San Diego, California.

Montana firm offers environmental services in the areas of groundwater, surface water, soils, wetlands, environmental site assessments, vegetation, and water rights.

UK firm providing water consumption management services and sewer surveys.

Specializes in surface water, ground water, water quality assessments, water rights, expert testimony, and environmental studies.

Providing services to the municipal and private water utility market in the areas of water quality and water treatment. Located in Santa Monica, California.

An engineering firm located in Flagstaff, Arizona. Specializing in river and stream research, assessments and restoration.

Ecological designs for gravity feed water supply, rainwater harvesting, cisterns, graywater treatment and reuse, composting toilets, edible landscaping. Also offers a collection of common grey water mistakes and books on gray water systems.

Environmental consultants specializing in marine, coastal and estuarine science. Based in Perth, Western Australia.

UK based water and environmental consultant. Describes expertise, including hydrology, hydrogeology, river modeling, and water quality modeling; offers services in these technical areas, EIA, expert witness, and project management.

Consulting, modeling, and software for watershed management, analysis of transport in soil and groundwater systems, and water resources planning and management. Offices in Blacksburg, Virginia.

Residential rainwater tank consultancy in Australia.

UK based company offering green engineering, environmental and erosion control solutions for rivers and lakes using willow spiling.

Landscape architect offering consulting on sustainable drainage, an environmentally friendly way of dealing with surface water runoff which avoids problems of current drainage practice. Located in Gloucestershire, UK.

Offers professional water-resource and environmental consulting services, including groundwater contaminant studies, remediation, geochemistry, and surface-water hydrology. Offices in U.S. and Canada.

Water supply and analysis, environment and ecology services.

Small Nevada-based civil engineering firm which specializes in water and wastewater treatment, collection, distribution and disposal. Site includes information and links about a variety of water resources and wastewater topics.

Consultant providing NPDES discharge permitting and compliance services to industry and municipalities. Site includes information about U.S. stormwater management requirements and other water quality topics.

Multiparameter water quality analysers. Sensors include temperature, dissolved oxygen, depth, pH, conductivity, salinity and turbidity.

Provides consulting services and systems for the pre-treatment of waste water in both large council systems and domestic applications.

Consultant for international water and environment projects, based in Spain.

Consulting services on water environment aspects of international development, focusing especially on Asia (Bangladesh and Vietnam) and Africa. Describes staff and projects and provides related internet links.

Specialties include aquifer storage and recovery, injection well services, groundwater supply development, wellfield design and rehabilitation, and development of reverse osmosis feedwater systems. Florida, U.S.A.

Qualifications and contact information for water engineering consultant offering technical advice and expert witness services on water resources and water rights. Based in Washington State, U.S.

Provices water conservation and water management consulting and training. Also provides engineering HVAC engineering and systems. Site includes information on services and client data.

Environmental consulting firm specializing in biological aspects of water quality, including studies of macroinvertebrates, zooplankton, and algae.

Consultants in the areas of coastal engineering, oceanography, numerical modeling, data collection and analysis, fate and transport of chemically contaminated sediments.