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The California Onsite Water Association promotes environmentally and economically sound onsite wastewater technology and management practices. Visit an archived version of our website to see more of what COWA has accomplished as we work to update our website.

Localizing California Waters Conference


Join COWA at the Localizing California Waters Conference, in beautiful Yosemite California.

The Localizing California Waters Confenence will convene on-site water organizations under one voice. At this intimate water reuse conference (focusing on rainwater, blackwater, greywater, and stormwater) professionals, designers, and policy advisers will work together to advance onsite water's technical and policy future.

COWA members receive discounted registration rates. Sign up for an updated membership and access to the event at CaliforniaWaterReuse.org

COMING SOON: All new professional resource and training catalog by the end of 2017

Sign up for the COWA email list to recive updates.