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STNI

STNISea-Tac Noise.Info

  • Solve for Sea-Tac. Solve for every airport.
  • Since 2016, working to obtain justice for everyone living under the flight path.
  • Less Noise. Cleaner Air. Better Public Health. Compensation.
  • Everything you think you know about the airport is wrong.

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  • 2020-05-29

    Stantec Sea-Tac Airport Communities Impact Study: Section 12 – Public Health (Pages 285–307)

    This 2020 public health study examines the effects of Seattle-Tacoma International Airport operations on nearby communities, analyzing health indicators such as cancer, heart disease, and Alzheimer's disease death rates between 2012 and 2016. Study area cities like Burien, Des Moines, Federal Way, SeaTac, and Tukwila generally showed higher cancer and heart disease death rates than King County as a whole, though rates declined somewhat over the period. The report aims to identify whether airport operations contributed to adverse health outcomes and recommends strategies for ongoing investigation and mitigation.
    TagsCommerce Impacts Study 2018, King County, Sea-Tac Airport, StantecFolderStantec
  • 2020-05-29

    Section 11: Public Safety — Study of the Current and Ongoing Effects of the Operation of the Seattle-Tacoma International Airport

    A 2020 study examined how Seattle-Tacoma International Airport has affected quality of life in nearby communities over the past two decades, looking at public safety, health, and socioeconomic conditions across three time periods: 1997, 2009, and 2019. The study built on a 1997 report that found airport neighbors bore disproportionate burdens—including lower property values, higher social service demand, and increased noise and pollution—while regional benefits largely bypassed them. Key findings confirm that many of those predicted adverse effects, such as shifts from owner-occupied to rental housing and rising service costs, have continued to materialize in communities closest to the airport.
    TagsCommerce Impacts Study 2018, Public Safety, Sea-Tac Airport, Socioeconomic Impacts, StantecFolderStantec
  • 2020-05-29

    Study of the Current and Ongoing Effects of the Operation of the Seattle-Tacoma International Airport

    A comprehensive study examining the current and ongoing effects of Seattle-Tacoma International Airport operations. The study was prepared for the Washington State Department of Commerce as authorized by ESSB 6032 and conducted by Stantec consulting firm.
    TagsDepartment Of Commerce, Stantec, State of WashingtonFolderStantec
  • 2020-05-29

    Study of the Current and Ongoing Effects of the Operation of the Seattle-Tacoma International Airport: Appendix A, Section 10 – Light

    This section of a 2020 study examines how the operation of Seattle-Tacoma International Airport affects nighttime light conditions in surrounding communities, using satellite imagery data collected between 1998 and 2018. Researchers analyzed 'skyglow' — light pollution caused by electric fixtures and light reflected off surfaces like roads and parking lots — across the broader Central Puget Sound region. The study notes that nighttime light emission readings can vary by 15–20% due to factors such as weather, seasonal vegetation, and imaging conditions, and it identifies specific light fixture types that contribute most to sky glow.
    TagsCommerce Impacts Study 2018, Department Of Commerce, Sea-Tac Airport, Stantec, StudiesFolderStantec
  • 2020-05-29

    Study of the current and ongoing effects of the operation of the Seattle-Tacoma International Airport

    This May 2020 report, prepared by Stantec for the Washington State Department of Commerce under legislative authorization ESSB 6032, examines the current and ongoing effects of operating Seattle-Tacoma International Airport (Sea-Tac). It assesses a range of impacts on surrounding communities resulting from airport operations. The study serves as a key resource for policymakers evaluating noise and other environmental effects associated with Sea-Tac's continued operation.
    TagsCommerce Impacts Study 2018, Department Of Commerce, StantecFolderState
  • 2020-05-29

    Appendix A, Section 9: Groundwater and Soil Quality — Study of the Current and Ongoing Effects of the Operation of the Seattle-Tacoma International Airport

    This 2020 environmental study examines groundwater and soil quality at and around Seattle-Tacoma International Airport from 1997 to 2019, tracking changes in contamination levels and evaluating whether they stem from airport operations, other pollution sources, or stormwater runoff. The report draws on data from the Port of Seattle, surrounding cities, and state environmental agencies to assess the effectiveness of the airport's cleanup efforts and identify any contamination that may have spread beyond airport property. The underlying geology—dense glacial till soils—generally slows the movement of contaminants through the ground in the area.
    TagsPort Of Seattle, Sea-Tac Airport, soil, Stantec, Water QualityFolderStantec
  • 2020-05-29

    Surface water quality: Study of the current and ongoing effects of the operation of the Seattle-Tacoma International Airport

    This report examines how Seattle-Tacoma International Airport has affected nearby surface water quality from 1997 to 2019, focusing on streams, wetlands, and stormwater systems that receive runoff from airport property. Researchers analyzed water quality data from multiple airport drainage outfalls — measuring pollutants such as copper, zinc, glycols, and turbidity — using records submitted to Washington State environmental regulators. The study also tracks how major airport developments, including the construction of a third runway, have influenced local waterways like Miller Creek, Walker Creek, and Des Moines Creek.
    TagsStantecFolderStantec
  • 2020-05-29

    Sea-Tac Airport Communities Impact Study: Appendix A, Section 7 – Mobility

    This 2020 report examines how Seattle-Tacoma International Airport has affected mobility in surrounding communities between 1997 and 2019, focusing on traffic congestion, residential parking, and pedestrian access. It documents major infrastructure changes such as the 2010 consolidation of rental car facilities to an off-site location 1.5 miles from the terminal and the expansion of the main parking garage from 10,000 to roughly 13,000 spaces. The analysis draws on data from government agencies including the Port of Seattle, WsDOT, Sound Transit, and King County Metro to identify transportation impacts and recommend future tracking measures.
    Tagsnon-aviation transportation, Parking, Port Of Seattle, Sea-Tac Airport, StantecFolderStantec
  • 2020-05-29

    Sea-Tac Airport Communities Impact Study: Air Quality Analysis (Section 6, Appendix A)

    This 2020 study examines how Seattle-Tacoma International Airport affects regional air quality, reviewing data from 1997 to 2018 collected across 13 monitoring stations within a 15-mile radius of the airport. It finds that King County consistently meets federal, state, and regional air quality standards for pollutants such as ozone, carbon monoxide, nitrogen dioxide, and particulate matter. In fact, pollution levels have generally decreased over time, leading authorities to shut down some monitoring stations near SeaTac due to consistently low readings.
    TagsKing County, NAAQS, PSCAA, StantecFolderStantec
  • 2020-05-19

    Burien Airport Committee meeting agenda, May 19, 2020

    The Burien Airport Committee held a virtual meeting on May 19, 2020, to discuss airport-related policy matters, including a proposed letter to Port Commissioners about a 'new normal' for airport operations, comments on a Department of Commerce report, and a possible invitation to an FAA Community Ombudsperson. Draft minutes from the April 21, 2020 meeting were also reviewed, covering Chair Tosta's Washington, D.C. visit to advocate for a comprehensive cumulative impact assessment of the Port of Seattle's Sustainable Airport Master Plan (SAMP). The meetings, held via Zoom due to COVID-19 restrictions, reflect ongoing community and city council efforts to address noise and environmental concerns related to Sea-Tac Airport.
    TagsBAC, Burien Airport Committee, FAA, Port Of Seattle, StantecFolderBurien Airport Committee

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Upcoming Events

  • Stay Grounded Event: Night trains, not night planes!
    Add to CalendarMSunday Sep 13: 12:00am
    Ntnnp social media3

    For the past two years, more than 220 initiatives from 15 countries have declared September 13th as the International day for the ban of night flights at airports. In parallel, activists across Europe have been gathering for pyjama parties for night trains – coordinated in 2024 and 2025 by Back on Track and Stay Grounded.

    [...]
  • Burien Airport Committee Meeting September 15, 2026
    Add to CalendarMTuesday Sep 15: 6:00pm
    400 SW 152nd St, Burien, WA 98166
    Burien airport committee 15 sep 2026 agenda pdf pdf

    a) Part 150 Noise Study (Emily Inlow-Hood) — 15 minutes
    b) SAMP Update and Next Steps (Brian Davis and Sarah Moore) — 15 minutes
    c) Legislative Updates — 10 minutes
       • SCA (Sarah Moore)
       • Work with Sen. Orwall (Brian Davis)
    d) StART Reorganization (Jeff Harbaugh and Karen Veloria) — 10 minutes

    [...]

[See all...]


Help study childhood asthma. Get free HEPA filter!

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Issues

Sea-Tac Airport is currently undergoing the largest and longest expansion in its history, collectively known as the Sustainable Airport Master Plan (SAMP). Some of it you can already hear, but you’re probably not aware of what it all means. Here’s what you need to know.
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Read This!

As the source for federal transportation grants, the Puget Sound Regional Council was charged with developing a system to meet the growing need for commercial aviation. When the search for a second airport failed, they authorized the Port of Seattle to build the Third Runway, with a mandate to develop a noise abatement and mitigation program. In their effort to stop the Third Runway, the ACC argued over every detail of the Port's efforts--including property buyouts and sound insulation. The dispute was meant to be settled by a three member Expert Arbitration Panel. This is their final report. It finds 2-1, that the Port's program was insufficient in several respects. Despite that, funding for the Third Runway was approved by the PSRC, and the 'Port Package' program, proceeded largely unchanged. Expert Arbitration Panel's final decision finding that the Port of Seattle had not shown sufficient reduction in real on-the-ground noise impacts to satisfy noise reduction conditions required for approval of a third runway at Sea-Tac International Airport. The majority decision concluded the Port's noise abatement programs were insufficient despite being impressive in scope.
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