California Onsite Water Association unifies and integrates California’s onsite water resources using environmentally sound and resilient practices through education, partnership, and policy change.

COWA increases public awareness and information encouraging localized water solutions...

We promote best management practices for system installations, operations and maintenance...

We help to streamline and modernize regulatory standards for onsite water technologies...

…and we support legislation and policy that embrace localized water as part of a comprehensive, sustainable management plan. 

Join us in promoting safe, effective, and water-saving practices, site by site.

    Education

    COWA provides integrated water reuse trainings for designers, practitioners, and regulators throughout California. We offer CEUs for practitioners and regulators.

    View Course Curriculums

    Community

    Join the coalition of partnering NGOs who collaborate on up-to-date and new training resources to reach optimum onsite resilience for all California communities.

    Member Resources

    News

    Sign up for our FREE quarterly newsletter Onsite Insite. We’ll keep you up-to-date on changes to legislation, coding, and industry news in California and the Western US.

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    California Onsite Water Association (c) 2023