AQUA TERRA was established in 1985 as a multi-disciplined environmental consulting and water resources engineering firm. Our founder, Anthony Donigian, is one of the original developers of the Hydrologic Simulation Program – Fortran (HSPF), a premier watershed modeling code. AQUA TERRA has established a reputation, through national-level competition, as a leader in the areas of environmental modeling applications, software development, and applied research for analysis of pollution and water resource management problems. As a successful small business for over 25 years, we offer our clients in business, industry, and government a flexible array of contract vehicles. AQUA TERRA Consultants joined RESPEC as of September 28, 2015.