The Bull Run Treatment Program is the largest continuing capital story in the City record. Federal and state requirements drive filtration, while Council controls budgets, bonds, rates, and public accountability for a multibillion-dollar project.
The Water Bureau is building filtration to remove Cryptosporidium and other contaminants and to improve seismic and emergency resilience. The City says filtered water is planned for 2029.
After adoption of the FY 2026-27 capital plan, the City reports a $2.58 billion total program, including $2.46 billion for filtration. Customer rates, federal loans, and water-revenue bonds finance the work.
In May 2026 Council authorized bonds producing up to $525 million in net proceeds. Those bonds are payable from water-system revenue, connecting project cost and debt service to future rates.