Working for a safe, affordable, vibrant, innovative, and interconnected city.
Learn More Home Page This Department


Long-Term Control Plan

The Plan to Protect Seattle's Waterways

Seattle Public Utilities is preparing a long-range plan that will create a comprehensive strategy to protect Seattle’s waterways. The plan:

  • Identifies areas of Seattle where CSO reduction projects are required
  • Evaluates solutions for reducing CSOs in affected areas
  • Selects a preferred alternative
  • Recommends a schedule for designing and constructing projects (2016-2025)

Read the Plan:

The Consent Decree

The plan describes how SPU will meet the requirements of the consent decree agreed to with federal regulators. This will enable the City of Seattle to comply with the Clean Water Act and state regulations, protect our waterways, and sustain our quality of life.

Complete Consent Decree

Glossary of Terms (pdf)