For 60+ years, CASA has been connecting California's clean water agencies through advocacy, leadership and education. Membership in CASA places your organization in an elite group of leaders dedicated to the advancement of clean water. CASA connects your voice and input to elected officials and keeps you current with what's happening at the state and national levels. CASA connects you to on-demand resources. Our staff of subject matter experts stand ready to answer your complex questions and connect you with the right people to address your agency's issues.