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 Go out and search for our rain tags: pluiË !
2 April 2024

Go out and search for our rain tags pluiË in the area of Geneva !

Plan des tags

Once you found them, take a photo, post it on Instagram or Facebook and tag us! Enjoy!!!




Image Regional Conference on Rainwater Harvesting and Management: A Step Towards Sustainable Development
27 March 2024

The International Rainwater Harvesting Alliance (IRHA) is delighted to share insights from the recently concluded Regional Conference on Rainwater Harvesting and Management, held in Kathmandu, Nepa...

Image IRHA - New Partner Introduction
27 March 2024

We're very happy to welcome the Nepal Rainwater Harvesting Alliance to IRHA, formalized during the "Regional Conference on Rainwater Harvesting and Management” in Nepal, wich was held on March 18...

Image New Collaborative Project in Uganda Takes Shape: Fostering Sustainable Agriculture and Reforestation
27 March 2024

Exciting developments are underway in Uganda as plans for a collaborative project begin to take shape. For this project IRHA partners with the Bethany Land Institute (BLI), and Agroforestry Promoti...


Image Opening exhibition HORS SEC

Opening exhibition HORS SEC

Sat23 March 24  - SunMay 24 

Image Stage ART & NATURE : Rain and Rainwater Management

Stage ART & NATURE : Rain and Rainwater Management

Mon22 April 24  - Fri26 April 24 

Image Rain Tags Vernissage

Rain Tags Vernissage

Sat27 April 24 


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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International Environment House 2
Chemin de Balexert, 9
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