Through the 30-year concession contract (divided into 6 five-year periods), ECAPAG entrusted Interagua for the management and development of water and sanitation services. The tariff structure must allow the company to generate sufficient income to cover its operation costs, investment costs and further deploy appropriate solutions for underprivileged city dwellers, while taking into account its own commercial risks.

As a consequence, according to the 6th clause of the public-private partnership agreement, Interagua has the right to receive as an income, all service and tariff collections corresponding to Drinking Water and Sanitary Sewer systems.

Revenues from invoice payments are re-invested as follows:

• 34% - purchases and installation of new equipment / installations
• 18% - operation and maintenance of the infrastructures in place
• 32% - electricity bills, chemicals and financial costs, taxes
• 16% - wages.

Under the concession contract, the consortium forecasted to invest 520 million USD in upgrading, and extending the water supply system.

During the 6th year of the concession, Interagua has strengthened its organizational structure and control and availability of financial information, in order to improve the decision-making process – both in terms of preventive and corrective actions.