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 Nepal - Bees for biodiversity and the rural economy
24 May 2024

One of IRHA's project takes place in Kaski and Chitwan districts in Nepal. In partnership with three local partners Sapana Village Social Impact - SVSI, Local Initiatives for Biodiversity, Resarch ...

Image A Successful Knowledge-Sharing Workshop in Senegal !
13 May 2024

Rainwater was at the heart of a knowledge-sharing workshop organized by the International Rainwater Harvesting Alliance (IRHA) in partnership with the Senegalese Rainwater Harvesting Association (ASGEP). From April 15 to 16, 2024, in Djilor Djidiack, Senegal, this event brought together committed minds, including members from 14 Senegalese NGOs: Agrosol, ASPSP, Caritas Kaolack, Djigui Sembe, FADDO, Ferme des 4 Chemins, Gret, Fédération Kajoor Jankeen, Keur Yakaar, Kuu Tinaa, Océanium Dakar, UrbaSen, ASGEP, in collaboration with 6 organizations from the FGC: ASED, IRHA, JACO, SIT, Tereo, and Urbamonde, in the quest for sustainable solutions to climate challenges.

Through this initiative, IRHA aims to make rainwater not only an efficiently managed resource but also a catalyst for sustainable development. The workshop began with a reflection on the role of rainwater in the participants' respective projects, aligned with the Sustainable Development Goals.

Following a schedule rich in exchanges and discoveries, the participants explored different facets of rainwater harvesting. From theory to practice, including sharing inspiring experiences, each moment was an opportunity to enhance skills and promote a collaborative approach.

The water cycle was addressed in its complexity, highlighting the need for integrated watershed management. Technical solutions, such as vegetated stone cordons and blue schools, were presented and discussed, illustrating the diversity of possible approaches.

The field visit offered concrete perspectives, from calabashes to market garden plots, demonstrating the tangible benefits of sustainable rainwater harvesting. Interactions with local actors enriched the understanding of the issues and solutions adapted to each context.

In conclusion, this workshop marks the beginning of a journey, a collective quest for more responsible water harvesting. The recommendations made, derived from evaluations and exchanges, pave the way for future collaborations and initiatives. Rainwater, far from being a mere meteorological element, thus becomes the symbol of a common vision: that of a sustainable and resilient future for all.

Workshop Report

Image Tags de PluiË in Geneva !
29 April 2024

On Saturday, April 27th at 4 pm, the vernissage of Tags de PluiË took place on the Pont de la Machine in the heart of Geneva!

Tag Creation Process

We aimed to create the tag phrases in a participato...

Image Walking the trail in Nepal
25 April 2024

Following the 2-day Regional Rainwater Conference on 18 and 19th of March organized by the Nepal Rainwater Harvesting Alliance (see March newsletter), Florian Bielser, IRHA Programme Officer, an...

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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