Wastewater Management Is Essential For Your Success. Read This To Find Out Why.

Recent projects in the South End Wastewater Treatment Plant include:

Connecting the plant to the SeaPort Wastewater Pipeline

As part of the SeaPort Extension Project, the SeaPort pipeline connects the South End Wastewater Treatment Plant to the SeaPort Connector – the only wastewater transmission system in the Seattle area providing a direct connection between the West Seattle Wastewater Treatment Plant and the Rainier Beach Wastewater Treatment Plant. The combined systems operate as a single, combined sewer facility, collecting and transporting wastewater between the facilities. This allows a single management system to manage both wastewater streams. Currently, the combined system (with 8 pumps) produces a combined 23 million gallons per day of wastewater and wastewater conveyance to a system of 3 pump stations at the SeaPort Connector. When complete, the SeaPort Connector will connect to the North End Wastewater Treatment Plant (NWTS), a combined wastewater treatment facility, and serve West Seattle residents with treatment capacity of 12 million gallons per day.

Meeting Wastewater Sustainable and environmental impact

To meet the requirements of the Clean Water Act, the SWTS Water Treatment Plant must comply with its performance requirements. These requirements include the following:

Select an environmentally and sustainably acceptable design.

Establish an adequate capital and operating cost to prevent facility deterioration.

Consider the current design in terms of upgrading or replacing features to reduce potential impacts to nearby properties.

To meet this requirement, the SWTS has established a final design which uses a self-supporting building with a concrete floor. This design ensures an adequate structural foundation (under a drainage layer). This solid foundation will help prevent flooding in the future and reduce water loss in flood events. Water is stored in an underground tank to provide an appropriate amount of water supply for treatment. The wastewater pipeline has an external coat that is intended to contain the flow of wastewater for a sufficient amount of time before entering a storm water retention facility. This allows the rainwater to drain into a storm water system that will be beneficial to future storm water management projects in the area. The SWTS Water Treatment Plant is designed to comply with the limits set forth in the WASTEWATER Act, and it will continue to provide improved quality water to municipal clients in the district for many years to come.



The Southwestern Towers are comprised of 79 single-family homes (only two properties have land for development purposes) and represent approximately 2.5 acres of open space within the flood hazard area, with sufficient room to develop a planned community (when land is eventually acquired). In addition, the site is located within an area that has been identified by the Southwest Water Treatment Plant to be suitable for development of a new wastewater facility. These properties are comprised of 5 acres of land currently used for open space and will be removed to accommodate the SWTS Water Treatment Plant. There will be up to 58 additional single family homes built on approximately 1.2 acres of land currently designated for residential and commercial development.

The SWTS continues to explore all possible strategies to acquire these properties to ensure a development plan that will maintain property values in the Southwestern Water District. The SWTS recognizes the value of having appropriate land, which is critical in providing storm water management capacity for Southwestern San Diego. This type of development activity will provide better flood protection and provide opportunities for future growth while providing affordable housing and clean water to residents of Southwestern San Diego.

2018 Projects

As of December 31, 2017, there were 77 active projects within the SWTS. These projects are classified into several categories:

Projects that were approved for the first time in 2017. The San Diego City Council has approved 21 of these projects, and projects are currently in planning phase.

The San Diego City Council has approved 21 of these projects, and projects are currently in the planning phase. Projects that have been approved by the SWTS in previous years. These projects are currently in the planning phase, and the SWTS expects to move forward with developing plans for these projects in the next six months.

Projects that were completed in 2017. This includes rehabilitation projects on the existing treatment plant, new investments to improve the wastewater management system and the life of the WASTEWATER Act to achieve full compliance with the limits set forth by the WASTEWATER Act.

The San Diego City Council has approved 17 of these projects, and projects are currently in the planning phase.

Projects that are approved in previous years. This includes improvements to storm water management and life of the WASTEWATER Act to achieve full compliance with the limits set forth by the WASTEWATER Act.

Since the WASTEWATER Act passed, the SWTS has completed 23 projects to meet the limits set by the WASTEWATER Act in one of the primary environmental preservation districts in the City of San Diego.

The SWTS’ dedication to ensuring that projects are complete in a timely manner is critical to the organization’s ability to implement policies and procedures for future projects. The SWTS will continue to move forward with appropriate actions to meet current regulations and enhance our commitment to environmental protection in a manner that enhances the SWTS’ growth strategy.