We are specialists in the design, construction, operation & maintenance of all types of water and wastewater treatment plants, Cadagua is a pioneer and a leader in the national market of engineering and construction of water and wastewater treatment and RO desalination facilities.

Company details

Gran Vía nº 45, 7º - 8º piso , Bilbao , Vizcaya 48011 Spain

Locations Served

Business Type:
Engineering service provider
Industry Type:
Water and Wastewater
Market Focus:
Globally (various continents)
Year Founded:

With 440 employees and a turnover in 2012 of 125 million Euros, Cadagua is a clear reference in the development of water treatment and desalination plants. We have designed and built more than 200 plants (sewage, drinking and desalination), and we have reached a total treatment capacity of over 15,000,000 m3/d. regarding Operation & Maintenance, our contracts total approximately 21 million equivalent population.

These figures place Cadagua at the head of the Spanish companies in this field.


Make a valuable and lasting contribution to humanity.


Develop intelligent infrastructure to the customers’ full satisfaction, with respect for the environment, in order to maximize shareholders value, professionally foster all of our employees, and make a contribution to improve our society.

  • Solution: Anticipate, Improve and Solve.
  • Innovation: Progress, Create and Inspire.
  • Efficiency: Efficacy, Results and Reliability.
  • Integrity: Ethics and Openness.
  • Respect: Care and Protect.
  • Collaboration: Teamwork, Cooperate and Share.