The WASHCollab project strengthened the global data ecosystem for Water, Sanitation, and Hygiene (WASH) through a partnership between openwashdata at ETH Zurich and WASHWeb. We maintained existing open-source tools for critical WASH data, developed new tools for economic data analysis, and disseminated our work globally. We maintained the Joint Monitoring Programme (JMP) R data package through strategic guidance on architecture and documentation. We developed an R package for UN-Water GLAAS data: the production-ready glaas package (v0.1.3, Zenodo DOI 10.5281/zenodo.15497462) with 263,033 observations. WHO requested the updated package for dissemination alongside their 2026 GLAAS report. The R package follows FAIR principles with open licensing, comprehensive documentation, and permanent identifiers, making critical WASH data accessible to researchers, practitioners, and policymakers worldwide. We co-organized a hybrid session at Stockholm World Water Week (August 2024) with six speakers from government, research, NGOs, and UN sectors representing six countries. Approximately 100 participants engaged in cross-sectoral discussions. We hosted a webinar in March 2025 on WASH open data innovations.