TEDAGUA (Técnicas de Desalinización de Aguas, S.A.) began operations in 1983 in Las Palmas de Gran Canaria. In the beginning its activities were focussed on the Canary Islands and south-east Spain, with occasional projects also being executed internationally.

The company was taken over by the ACS Group in 2001, and was incorporated into the Cobra Group. Since then, Tedagua has become an international leader in the design, construction, operation, maintenance and engineering of desalination plants, systems for producing drinking water from brackish feedwater, and plants for recycling water from sewerage feedwater. The company is also a leader in the design and construction of plants for treating and reusing urban and industrial waste for electricity generation.

Tedagua's has grown considerably in recent years and, with water treatment contracts in all five continents, it is now justifiably considered a world leader in the water treatment sector.