More than 45 years of experience

Reduction of non-revenue water and optimisation of energy efficiency in systems operated by AyA in Costa Rica (RANC-EE Project)

Project details
Costa Rica
Associated enterprises: 
Architecture & Urban Development
Project volume: 
14,760,100 €
Value of services: 
6,642,045 €
Start of project: 
July, 2019
End of project: 
July, 2024
Project description: 

Non-revenue water (NRW) is an increasingly problem in Costa Rica. According to the Instituto Costarricense de Acueductos y Alcantarillados (AyA), the NRW index in its aqueducts is around 50% (estimates due to the fact that water consumption is not measured in its entirety). Although micromeasurement coverage is high (>90%), a good part of the installed micrometers need to be replaced, as they have already exceeded their useful life and a significant portion no longer records consumption adequately.

AyA repairs the visible leaks that are reported to it, but does not have a programme for the detection of non-visible leaks or detection of unregistered home connections, although the latter it´s done sporadically.

AyA has digital plans of the water supply aqueducts for the GAM, not updated in its entirety; and less than 50% of the commercial data are georeferenced. In the case of peripheral aqueducts, there are no digital plans or georeferencing of commercial data.


Service description: 

Services A: "Implementation Consulting" has as main objective to support the AyA in:

  • Development of the action plan (technical and operational);
  • Accompaniment in the processes of hiring/contracting;
  • Supervision of the investment measures of the project;
  • Theoretical-practical training to the personnel of the Execution Unit of the project inside AyA (hereinafter: UEP RANC-EE) and operative personnel of the AyA during the execution of their tasks; and
  • Elaboration, updating and optimisation of manuals, procedures, design, etc.

Services B: "Institutional Consulting" has as main objective:

  • To create the management, institutional, commercial and technical capacities for the AyA to implement the project in a sustainable and autonomous manner, and to achieve the institutionalization of the NRW reduction and optimization activities of the EE;
  • Change management;
  • Elaboration of the Baseline Study (technical, commercial, operational and institutional);
  • Action plan (commercial and institutional);
  • Institutional accompaniment of the project;
  • Training of AyA personnel in technical, commercial and institutional aspects of the reduction of NRW and optimisation of energy efficiency; and
  • Technical assistance for the development of user awareness campaigns.

Therefore, the main objective of this assignment is to contribute to an ecologically sustainable and economically efficient management of water resources through:

(a)   A reduction and continuous control of unbilled water, made up of authorised unbilled consumption and 'real' (physical) and 'apparent' (commercial) water losses; and

(b)  The optimisation of energy efficiency in aqueducts selected and operated by the AyA in the terms of the IWA definitions.

The project has a duration of 5 years and includes the following water supply systems: GAM Aqueduct (also known as San José Metropolitan Aqueduct) and 7 aqueducts of the so-called Peripheral Systems: Liberia, Limón, Guácimo, Pérez Zeledón, Puntarenas, Pasito de Alajuela and San Ramón.

Other objectives of this assignment are:

  1. Establishment of the RANC Management System;
  2. Reduction of real water losses;
  3. Reduction of apparent losses; and
  4. Reduction of energy consumption (kwh / m3).