CERTIFICATIONS
Training and Certification to Start a Business
RAINWATER HARVESTING
The Forgotten Resource
OUR MISSION
To provide resources and information on rainwater and stormwater collection, making rainwater conservation accessible to all and to work with government at every level to promote the advancement of rainwater management.
EDUCATION
Learn More About Rainwater Harvesting
ARCSA MEMBERSHIP
Become a Part of Our Organization
ARCSA is a grass-roots, membership-based organization with access to leading news and advancements in rainwater catchment technology. This site establishes a forum for members to share and gain knowledge about this growing industry. Members range from government officials, academia professionals, consultants, and manufacturers/suppliers of rainwater harvesting equipment, to backyard amateurs and passionate conservationists. ARCSA aims to provide expertise and information on the importance of rainwater collection environmentally, economically, and socially in a way that is accessible to all. Here you will find everything you need to know about rainwater harvesting for both potable and nonpotable purposes. You can also take training courses to earn a certification to become an accredited rainwater harvesting professional in the industry.
SAVE THE DATE
UPCOMING IN-PERSON WORKSHOPS
Each workshop will meet the educational requirement for the corresponding ASSE 21000 Series Certification
DESIGNER WORKSHOP
July 28-29, 2025
Azusa, CA
INSTALLER WORKSHOP
July 30-31, 2025
Azusa, CA
INSPECTOR WORKSHOP
August 1, 2025
Azusa, CA
DESIGNER WORKSHOP
September 13-14, 2025
Thousand Palms, CA
Latest Achievements
ARTICLES & GUIDES
Greenhouses and Rainwater Harvesting: Cultivating Sustainability Year-Round
Rainwater harvesting in greenhouses is a sustainable way to reduce water use, lower costs, and improve plant health. By capturing rain instead of relying on treated water, growers support soil health and cut environmental impact. From large farms to backyard gardens, successful systems around the world show how this simple method can provide year-round irrigation, even in dry regions. With proper setup, it's a practical step toward more resilient and eco-friendly food production.
The Role and Importance of Rainwater Tank Liners
Water tank liners play a vital role in ensuring effective and sustainable water storage, particularly in regions with unpredictable rainfall. ARCSA member Bartlett Tank Liners, a manufacturer of tank liners, presents an article on the importance of these products. These durable membranes line the interior of tanks, protecting against corrosion, leaks, and contamination while maintaining water quality. Tank liners are essential for rainwater harvesting systems, enabling the safe storage of water and extending the lifespan of tanks.” And the cover photo for the article will be the one attached.
The Role of Rainwater Harvesting in Zoos
Zoos are ideal venues for demonstrating the importance of sustainable water management due to their unique role in conservation, education, and community engagement. Rainwater harvesting involves capturing and storing rainwater from roofs, pathways, and other surfaces for reuse in irrigation, animal care, and cleaning.
LATEST NEWS
ARCSA INTERNATIONAL UPDATES
ARCSA Rainwater Harvesting Classes Approved for Continuing Education in Ohio
ARCSA International is proud to announce that its Professional Rainwater Harvesting Classes for Designers, Installers, and Inspectors have been officially approved by the Ohio Department of Health for continuing education (CE) credits for registered private water systems contractors.
Rainwater and Stormwater Standards Consensus Body Members Sought for Development of ARCSA/ASPE/IAPMO Standards 63 and 78
Ontario, Calif. — IAPMO®, the American Society of Plumbing Engineers (ASPE) and ARCSA International are seeking technical experts to participate in the following consensus bodies: Rainwater Standards Committee and Stormwater Standards Committee.
U.S. GSA’s P100 Document Now Requires ARCSA International Standard Compliance
ARCSA International is pleased to announce the United States General Services Administration (GSA) has accepted its proposed change for the Facilities Standards for the Public Buildings Service (P100), requiring major capital projects of more than 5,000 square feet employing rooftop rainwater catchment and harvesting systems to comply with relevant ARCSA/ASPE/ANSI standards.
