Our missions is to provide resources and information on rainwater collection, promote the advancement of rainwater conservation and work with state, county and other local governmental units in promoting rainwater catchment.

ARCSA (www.arcsa.org) is a 501(c)(6) nonprofit with close to 1000 members in 14 nations, including large businesses, individuals, regulators, water purveyors, elected officials, manufacturers, designers, utility officials, installers, sustainability advocates, system maintainers, architects, plumbers and other enthusiasts. ARCSA offers resources, documents, presentations, webinars and discussion forums on its website and offers a workshop for rainwater harvesters.

The most enlightened rainwater harvesting practices involve a recognition and exploitation of the relationships among ARCSA’s mission components. For example, sustainable harvesting of rainwater for gravity-fed nonpotable drip irrigation diminishes the stormwater impact of rain events, decreases the water-energy footprint and displaces the need for an equal amount of highly treated potable utility water.

ARCSA joined the International Rainwater Harvesting Alliance (IRHA), the International Rainwater Catchment Systems Association (IRCSA) and 30 other groups from around the world in endorsing the use of rainwater as a tool to address water-related problems and to provide a regular supply of safe, accessible and affordable drinking water in sufficient quantity to the world’s population, as called for by the UN Human Rights Council.
While ARCSA’s membership is predominantly in the United States and Canada, the organization has members in 12 other nations and regional representatives in Australia, Ireland and England.

The ARCSA website menu includes a robust member search engine, Find a Pro in the ARCSA Resource Guide which effectively identifies members within a selected radius of a zip code.