The CEOS Chair and SIT Chair are co-hosting a Water Quality Workshop at SIT-41 (April 13th, 2026) and CEOS-TW 2026, focused on strengthening the use of Earth observation data for water quality management across interconnected freshwater and coastal ecosystems, addressing critical challenges, identifying key opportunities, and defining a shared vision for CEOS to enable scalable and impactful Earth observation research and applications.