WaterWorks Grant Program
King County’s WaterWorks Grant Program has $4.6 million in funding available for community-driven projects that protect water quality, control pollution, and build healthy communities. Projects must provide an improvement to water quality within the Wastewater Treatment Division service area, and non-profits, Tribes, cities, schools, and special purpose districts are eligible to apply.
Applications are open now and due September 30, 2025. The application process begins by filling out a short Letter of Intent form through the online grant portal. Selected applicants will be invited to submit full proposals in February 2026.