International Rainwater Harvesting Alliance

The International Rainwater Harvesting Alliance (IRHA) is a Swiss non-governmental organisation based in Geneva since 2002. IRHA's mandate is to promote rainwater as a sustainable solution to water scarcity, natural disasters that undermine ecosystems and communities.


Our work is based on the implementation of rainwater management projects in developing countries where access to clean water and vulnerability to climate change are daily problems, directly and negatively impacting the lives of thousands of people.

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2 Billion

people still lack basic hygiene services




Programme 1

Rainwater for Water, Sanitation and Hygiene

Access to safe water and sanitation, as well as appropriate hygiene, is a human right and can prevent a significant proportion of water-related diseases.

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Programme 2

Rainfed Agriculture and Food Sovereignty

Rainfed agriculture represents more than 85% of family farming today. Ongoing climate change is impacting on the harvests and food sovereignty of farming communities.

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Programme 3

Disaster risk management and ecosystem restoration

The weakening of forest, mangrove and wetland ecosystems, which helps reduce exposure to major risks, increases the vulnerability of communities to the effects of climate change.

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Programme 4

Urban Rainwater

Storm rain, flooding, creating islands of coolness, rainwater management in the city has emerged in recent years as a nature-based solution (NbS) that cannot be ignored in managing a sustainable city.

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Programme 5


Alliance of partner organisations involved in the implementation of sustainable rainwater management solutions on all continents.

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Countries of Operations

IRHA develops projects in areas where the needs are felt, where the conditions for long-term work exist and where we have local partners, who are solidly anchored locally and capable of ensuring the sustainability of investments.

IRHA has developed strong relationships with a network of national rainwater organisations (Alliance) with whom we maintain close links, particularly for advocacy and policy making.




Image The porous irrigation jars are ready for use at the Moraines Garden !
22 July 2024

At the nature festival in late May, volunteers guided by artist Mathilde Chenin from Atelier Bermuda created porous irrigation jars at the Moraines Garden. After being shaped from clay, the jars ha...

Image Rainwater Harvesting: A Sustainable Solution to Global Water Crises
11 July 2024

In the context of escalating global extreme weather events and the increasing prevalence of heatwaves, the importance of sustainable water management practices such as rainwater harvesting has beco...

Image WASH (Water Sanitation and Hygiene) good practices in Nepal
11 July 2024

Good practices in hand washing are essentials to keep a global healthy community. In the scope of the Rain community project, Kanchan Nepal is conducting WASH training to rural community who have...

Image Resilient water management on a watershed scale
5 July 2024

One of the consequences of climate change is the intensification of extreme phenomena, and rainfall is no exception. More and more extreme rainfall events are bound to hit our territories, creating...

Your support is key


Name: IRHA
Account: 17-198970-3
IBAN: CH15 0900 0000 1719 8970 3

Recognised as a public utility, your donations to the IRHA are tax deductible.



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