who we are


The International Rainwater Management Alliance (IRHA) was created in Geneva in November 2002, following the recommendations of the World Summit on Sustainable Development in Johannesburg (South Africa).

IRHA’s mandate calls for the federation and unification of the disparate rainwater harvesting (RWH) movement around the world, to promote rainwater as a valuable water resource and to build on achievements in this field for the fulfilment of the Millennium Development Goals.

In partnership with International organizations and local partners, IRHA provides adapted solutions, a lobbying and advocacy platform for RWH. It supports the growth of RWH solutions to water supply problems. It also provides a forum for its members to work together or share experiences, benefiting those who live in water scarcity.


IRHA promotes a large use of rainwater to:

– support developing countries and alleviate poverty;
– ensure water supply to improve living conditions (agriculture, health and food security);

– rehabilitate catchments and maintain soil ;
– provide preventive disaster risk and mitigation measures;


We strongly believe that rainwater harvesting solutions should be replicable, owned by the community itself, using cheap and local materials in order to develop cost effective solutions. All IRHA’s projects are results based which means that they are developed based on an in-depth assessment, a clear strategy using analytical tool such as the logical framework. It helps us to monitor the achievements and the impact on the communities.


In 2010 IRHA granted ECOSOC status and was shortlisted for the “Prix de l’Ethique Suisse”.

ecosoc Logo+Prix+Suisse+Ethique_CMJN

where we work

Rainwater from the tap

Rainwater from the tap ©RTS 2016


Rain Projects

Implementing rainwater harvesting technologies and projects in urban or rural areas for water security, drinking water, groundwater recharge, infiltration or stormwater management

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Rain Awareness

Raising awareness, training the professionals and community on rainwater harvesting technologies, strengthening their resilience and capacity to cope with climate change.

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Rain Network

Building bridges between professionals, enhancing links and working as a Community of Practice, exchanging, learning and building knowledge on previous experiences and expertise.

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Rain Advocacy

Advocating and promoting rainwater as a sustainable solution for climate change adaptation, groundwater recharge, flood management and bringing the debate at policy development level.

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