Conveyance System Improvement Program
The CSI program looks at ways to improve the conveyance system and address public health concerns, while ensuring that the system has sufficient capacity to respond to regional growth.
The county's regional wastewater conveyance system consists of more than 350 miles of pipes and 42 pump stations that moves wastewater from local communities to the county's three regional secondary treatment plants. View service area maps.
Since 1999 the Conveyance System Improvement (CSI) program has focused on upgrades and improvements to King County-owned regional wastewater facilities in three important areas:
- Providing a consistent approach to conveyance planning throughout the service area.
- Incorporating population growth and current operational and environmental considerations in the planning process
- Providing opportunities to address common issues, leverage resources, and minimize customer disruption.
King County's Wastewater Treatment Division completed the planning process for the initial phase (five-year program) in 2003 and issued a program update in June 2007.
This website is where you will find completed planning studies and information about conveyance system planning focused on upgrading the existing regional conveyance system level of service provided to the 34 local sewer agencies in King and Snohomish Counties.
One of the highlights of this program is its integration with other system programs, as outlined in the Regional Wastewater Services Plan, including: