Welcome!

Rainwater catchment — or “harvesting” — is an ancient practice now enjoying a revival as an alternate water supply. The practice involved collecting rainwater from a roof or other surface before it reaches the ground and storing it for future use.

ARCSA promotes rainwater catchment systems in the United States through educational opportunities and the exchange of information at our Web site and through our workshops. Our membership consists of professionals working in city, state, and federal government, academia, manufacturers and suppliers of rainwater harvesting equipment, consultants, and other interested individuals. Membership is not limited to the US, and we encourage all rainwater harvesting enthusiasts to join our organization. Learn more here.