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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 King Conservation District (KCD) offers a Soil Nutrient Testing Program for landowners in King County, Washington, providing up to five free soil tests per address to help residents manage fertilizer use, protect water quality, and optimize plant growth. Samples are sent to a certified lab to analyze key nutrients, pH, and organic matter, with results typically returned within three weeks. Additional tests beyond the free allotment are available for $30 each.

This C.A.S.E. (Communities Against Sea-Tac Expansion) campaign poster calls for a ban on night flights over residential neighborhoods between 12am and 6am. Under the slogan 'Time Out,' it argues that eliminating overnight aircraft noise is essential for community health, emphasizing that better sleep leads to better health. The image uses a standard prohibition symbol over a nighttime airplane silhouette to visually reinforce the demand for a quiet curfew period.

The 'Flight Pattern Kids' group, a non-profit based near Seattle-Tacoma International Airport, claims that residents living within a 3-mile radius of the airport experience significantly elevated rates of cancer, birth defects, and auto-immune diseases compared to the general population. Their self-reported study of 330+ families suggests these health issues stem from toxic environmental exposure linked to airport operations, which they argue causes gene mutations passed across generations. The group is calling for further environmental testing of air, water, and soil in the surrounding area.

This campaign mailer from the Washington Alliance of Taxpayers and Travelers (WATT) opposes the Port of Seattle's plan to build a third runway at Sea-Tac Airport, calling it a billion-dollar 'boondoggle' that would take four years to construct and burden the region with overwhelming truck traffic. The group warns that the project would require moving 26 million cubic yards of dirt via 2,000 trucks per day through neighborhoods across the Puget Sound region, and that taxpayers could face property tax increases of over 60% if airline fees fall short of covering costs. Residents are urged to contact the Port of Seattle and mail in an attached postcard to oppose the runway expansion.

A DESCRIPTION OF THE PORT OF SEATTLE'S RELOCATION ASSISTANCE PROGRAM

The Port of Seattle's Fall 2022 Air Mail newsletter highlights major updates at Seattle-Tacoma International Airport (SEA), including the opening of the new International Arrivals Facility, ongoing terminal modernization projects, and accessibility improvements. It also details noise mitigation efforts for neighboring communities, including a $40 million expansion of the Sound Insulation Program to cover more than 215 apartment units, with all work scheduled for completion by 2026. Additional topics include the Flight Corridor Safety Program, which removes tall trees near the airport that pose safety risks while planting native lower-height trees as replacements.

The Sea-Tac Communities Plan was a joint initiative launched in 1973 by the Port of Seattle and King County, funded in part by the FAA, to address conflicts between Sea-Tac International Airport operations and surrounding neighborhoods—particularly concerns about aircraft noise, property values, and land use. The plan found that while no major airport expansion was needed, noise remained a significant problem requiring a comprehensive remedy program including property acquisition, noise insulation, and purchase guarantees. Key recommendations called for coordinated action by the Port, County, and federal agencies to improve airport-community compatibility over a 20-year planning horizon.