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

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

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.

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

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

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.

Water supply and analysis, environment and ecology services.

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

Provides consulting water and wastewater residuals management, waste reduction, and environmental assessments.

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