International Water Services Association (IWSA)

Association internationale des services d'eau (AISE)

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1947, as International Water Supply Association (IWSA) -- Association internationale des distributions d'eau (AIDE) -- Asociación Internacional de Distribución del Agua -- Internationale Wassersversorgungs-Vereinigung. 1st General Assembly: Sep 1949, Amsterdam (Netherlands). Ceased to exist, 7 Sep 1999, when merged with International Association on Water Quality (IAWQ), to form International Water Association (IWA).


As an international body concerned with public supply of water through pipes for domestic, agricultural and industrial purposes: secure concerted action in improving technical, legal and administrative knowledge; secure a maximum exchange of information and education experience on research, water management, water treatment, methods of water supply, statistics and other matters of common interest; encourage better understanding among those engaged in public supply of water.

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Organizes: IWSA Water Supply Congress (every 2 years); special conferences on specific subjects. Set up 'Foundation for the Transfer of Knowledge'. Divisions: 1. Management - includes 4 committees: Organization, Training and Education; Statistics and Economics; Public Relations; Information Systems. 2. Distribution - includes 3 committees: Planning and Construction; Operation and Maintenance; Materials and Corrosion. 3. Water Quality and Treatment - includes 6 committees: Particle Removal; Dissolved Substances Removal; Disinfection; Advanced Treatment; Laboratory Methods and Standards; Appropriate Technologies. 4. Resources - includes 4 committees: Surface Water; Groundwater; Watershed and Reservoir Management; Environment.


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English, French.


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Consultative Status

United Nations Economic and Social Council (ECOSOC) (Ros C); World Health Organization (WHO) (Official Relations).

Relations with Inter-Governmental Organizations

Relations with 2 inter-governmental organizations.
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Relations with Non-Governmental Organizations

Relations with 9 non-governmental organizations.
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Members in 179 countries
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Type I Classification

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Type II Classification

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Subjects *

  • Hydrology
    • Water
  • Social Activity
    • Services
  • Commerce
    • Purchasing, Supplying
  • Industry
    • Pipework, Cables
  • Government
    • Public

UN Sustainable Development Goals **

GOAL 1: No PovertyGOAL 6: Clean Water and SanitationGOAL 8: Decent Work and Economic GrowthGOAL 9: Industry, Innovation and InfrastructureGOAL 12: Responsible Consumption and Production



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* Subject classification is derived from the organization names and aims.
** UN SDGs are linked to the subject classification.

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