DHAN Vayalagam (Tank) Foundation, is a professional grassroots action oriented development organization with sub sectoral focus on water initiated on October 2, 2006. It has been incorporated as a Trust under the Indian Trusts Act (1882). The Trust has been promoted as the second thematic organization by DHAN Foundation to ensure that the benefits of its Vayalagam Tankfed Agriculture Development Programme reach a large number of poor with quality.

• Direct actions for upscaling the Vayalagam Programme to conserve as well as develop traditional small scale water resources in ‘resource poor’ areas of the Country in different context through direct action, and through appropriately oriented and concerned NGOs in other parts of the nation as Vayalagam Affiliates.
• Extensive policy advocacy initiative through effective and vibrant net working with practitioners and other stake holders.
• Intensifying and strengthening the programme by establishing a resource centre.