rainwater harvesting technologiesdrinking waterbest hygiene practicessanitation serviceswater for agricultureeducation and capacity buildinglocal knowledge & entreneurship

rainwater harvesting technologies

Facilitating access to water to communities...

drinking water

Ensuring water supply ...

best hygiene practices

Reducing risks of contamination and diseases...

sanitation services

Preventing health hazards and contamination...

water for agriculture

Fighting against hunger and poverty...

education and capacity building

Investing in young rainwater harvesters...

local knowledge & entreneurship

Supporting future actors of change...

Could Rainwater be a possible solution for climate change adaptation?

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What we do

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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About us




Project Implementation
Capacity building






The International Rainwater Harvesting Alliance (IRHA) was created in Geneva in November 2002, following recommendations of the World Summit for Sustainable Development in Johannesburg, South Africa. IRHA’s mandate call 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 in the field, the IRHA provides concrete 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, and thus benefiting those who live in water scarcity.


The IRHA promotes a large use of rainwater in every field of life, using Rainwater as a tool for climate change adaptation and as a precious water resource included in the Integrated Water Resources Management (IWRM) policy of each country and region.


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 a in-depth assessments, a clear strategy using analytical tool such as the logical framework. They help us to monitor the achievements and impact in the communities.


IRHA has gained since 2010 the ECOSOC status and was shortlisted for the “Prix de l’Ethique Suisse in 2010”

ecosoc Logo+Prix+Suisse+Ethique_CMJN

[Rain] Monitoring Tool

  • 8289000

    liters harvested
  • 592

    Sanitation facilities
  • 54

    Projects done
  • 21125

    beneficiaries reached

[Rain] projects


  • 100