Rainwater Harvesting Links

Disclaimer: Links to and information about Web sites outside the TWDB are provided solely for the convenience of the user and do not constitute an official endorsement of the information, products, or services contained therein.

Government Agencies


  • American Rainwater Catchment Systems Association (ARCSA)
    Founded in Austin, Texas, in 1994, ARCSA promotes rainwater catchment systems in the United States.
  • Center for Science and Environment: Rainwater Harvesting, India
    Comprehensive Web site of the Center for Science & Environment, India, dedicated to all aspects of rainwater harvesting with emphasis on India.
  • International Rainwater Catchment Systems Association (IRCSA)
    IRCSA promotes and advances rainwater catchment systems technology with respect to planning, development, management, science, technology, research, and education worldwide.
  • International Rainwater Harvesting Alliance, Switzerland
    The Alliance promotes rainwater harvesting within the context of Integrated Water Resources Management (IWRM) linking local social and economic development with the protection of vital ecosystems.
  • Lanka Rainwater Harvesting Forum, Sri Lanka
    Among other goals, the Forum aims to identify existing rainwater harvesting practices in Sri Lanka, and promote the application of rainwater for domestic purposes and aquifer recharge.
  • Rainwater Harvesting Implementation Network (RAIN), Netherlands
    RAIN is an international network that aims to increase access to water for vulnerable sections of society in developing countries - women and children in particular - by collecting and storing rainwater in water tanks and wells.
  • Texas Rainwater Catchment Association (TRCA), Austin, Texas
    The Texas Rainwater Catchment Association was created to provide the citizens of Texas with credible information and resources on rainwater collection, to promote the advancement of rainwater conservation and to work with state, county and other local governmental units in promoting rainwater catchment.
  • UK Rainwater Harvesting Association (UK-RHA), United Kingdom.
    UK-RHA is a company limited by guarantee formed to serve as a focal point for organizations with business interests in the rainwater harvesting industry.

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Academic Institutions

Useful Reference Manuals

  • The Texas Manual on Rainwater Harvesting, 3rd Edition, Texas Water Development Board, 2005 (2.42 MB)

    The manual serves as a primer in the basics of residential and small-scale commercial rainwater harvesting systems design. It is intended to serve as a first step in thinking about options for implementing rainwater harvesting systems, as well as advantages and constraints of the technology.

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