TagWater Quality(475)

Chapter 9 of SeaTac's Envision SeaTac 2044 Comprehensive Plan outlines the city's environmental goals and policies covering water quality, air quality, greenhouse gas reduction, wetlands, wildlife habitat, and shoreline management. The element also addresses environmentally sensitive areas such as steep slopes, floodplains, and groundwater aquifers, and includes recommended implementation strategies. Note that while this chapter covers broad environmental planning for the City of SeaTac, it does not specifically address Sea-Tac Airport noise policy.

This document is Chapter 10 of the City of SeaTac's Comprehensive Plan (Envision SeaTac 2044), covering the Utilities Element. It outlines the city's vision and policies for ensuring reliable, equitable, and resilient utility services—including water, sewer, electricity, natural gas, telecommunications, and stormwater—to support future growth through 2044. The chapter details goals for coordinating with utility providers such as Puget Sound Energy, Seattle City Light, and various water and sewer districts that serve the SeaTac community.

The Sea-Tac Communities Plan, jointly developed by the Port of Seattle and King County beginning in 1973, outlines strategies to improve compatibility between Sea-Tac International Airport and surrounding neighborhoods, with a focus on aircraft noise remedies, water quality improvements, and land use conversion. The plan identifies specific areas for outright property acquisition, purchase guarantees, and noise insulation programs affecting thousands of homes north and south of the airport. It also establishes policies for drainage management, community development, and long-term airport facility improvements to accommodate projected air traffic growth through 1993.

The Sea-Tac Communities Plan outlines strategies to improve compatibility between Seattle-Tacoma International Airport and surrounding neighborhoods, focusing on water quality, drainage, and land use. Key programs include public acquisition of noise-impacted residential areas for open space and recreation, conversion of single-family zones to higher-density or commercial uses, and reinforcement of existing neighborhoods through noise remedy and infrastructure improvements. The plan also addresses environmental concerns such as stream protection, holding pond systems for stormwater management, and pollution control near Miller and Des Moines Creeks.

The Port of Seattle is proposing upgrades to Seattle-Tacoma International Airport's Industrial Wastewater Treatment Plant (IWTP) to better handle wastewater from aircraft deicing operations, with construction planned from 2026 to 2030. The project involves replacing aging treatment equipment at the existing facility and building a new aerated gravel bed (AGB) treatment system on a 10.6-acre site nearby to process high levels of biochemical oxygen demand (BOD) on-site. These upgrades are required to comply with tightening discharge limits set by King County and state environmental permits.