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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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  • 2021-01-01

    Washington State greenhouse gas emissions inventory: 1990-2018

    This January 2021 report from the Washington State Department of Ecology tracks greenhouse gas emissions across Washington State from 1990 to 2018. Published by the Air Quality Program, it provides a comprehensive inventory of the state's emissions data over nearly three decades. Note that this document focuses on statewide air quality and climate data and does not specifically address Sea-Tac Airport noise policy.
    TagsAir Quality Monitors, Climate, Ecology, Greenhouse gases, State of WashingtonFolderState
  • 2020-12-31

    Annual financial report: As of December 31, 2020 and 2019, and for the years ended December 31, 2020, 2019, and 2018

    The Port of Seattle's 2020 Annual Financial Report covers the financial position and activity of the Port as of December 31, 2020 and 2019, and for the fiscal years ending 2020, 2019, and 2018. Prepared by the Port's Accounting and Financial Reporting Department, the report includes audited financial statements, management's discussion and analysis, pension fund information, and ten-year statistical trends. It provides a comprehensive overview of the Port's enterprise operations, which include Seattle-Tacoma International Airport and maritime facilities.
    TagsCAFR, Port Of Seattle, State of WashingtonFolderFinance
  • 2020-12-01

    Washington 2021 State Energy Strategy: Transitioning to an equitable clean energy future

    The Washington 2021 State Energy Strategy, published by the Washington State Department of Commerce in December 2020, outlines a blueprint for transitioning the state to clean energy by 2050, with the goal of nearly eliminating fossil fuel use while sustaining economic growth. The strategy emphasizes affordable and reliable energy, meeting science-based greenhouse gas emission limits, and ensuring that Tribes, rural communities, and low-income households are included as partners in the transition. Note: this document addresses statewide energy and climate policy and does not contain content related to Sea-Tac Airport noise policy.
    TagsClimate, Department Of Commerce, Energy, Environmental Justice, State of WashingtonFolderState
  • 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
  • 2020-01-17

    House Bill 2688: Relating to transportation policy goals

    Washington House Bill 2688, introduced in the 2020 legislative session, proposes updating the state's transportation policy goals to prioritize accessibility, environmental justice, public health, and climate by replacing older goals focused primarily on economic vitality and mobility. The bill would require transportation projects to undergo a multi-agency evaluation—including input from vulnerable and impacted communities—before receiving budget authorization. Projects that do not meet a minimum score based on the new policy goals would generally be excluded from funding.
    TagsEnvironmental Justice, Legislation, non-aviation transportation, State of Washington, Washington State LegislatureFolderLegislation
  • 2019-09-30

    Combined Excise Tax Return: Seattle Tacoma Intl Airport, Port Of Seattle — September 2019

    This document is a Washington State Combined Excise Tax Return filed by the Port of Seattle for Seattle-Tacoma International Airport, covering the period ending September 30, 2019. It details Business & Occupation taxes, state and local sales and use taxes, and public utility taxes across multiple classifications, resulting in a total tax liability of $1,439,820.52. The return was prepared by Bonnie McArthur and submitted on October 14, 2019, with payment scheduled via ACH debit on October 25, 2019.
    TagsDepartment of Revenue, Port Of Seattle, Sea-Tac Airport, State of WashingtonFolderTaxes
  • 2019-09-23

    Environmental Justice Task Force information

    Washington State's Environmental Justice Task Force, convened by the Governor's Interagency Council on Health Disparities, was established to recommend strategies for reducing environmental health disparities across the state, with a final report due to the legislature and Governor by October 31, 2020. The Task Force focuses on improving health outcomes for communities most severely impacted by environmental hazards, including low-income populations and communities of color. Its work includes developing guidance on community engagement, measurable health disparity goals, and model policies prioritizing vulnerable populations.
    Tagscommunity engagement, Environmental Justice, Front And Centered, Health, State of WashingtonFolderSP #2
  • 2019-09-17

    RCW 36.70A.200: Siting of essential public facilities—Limitation on liability

    RCW 36.70A.200 requires counties and cities planning under Washington's Growth Management Act to include a process in their comprehensive plans for identifying and siting 'essential public facilities' — those typically difficult to site, such as airports, state education facilities, regional transportation facilities, correctional facilities, solid waste handling facilities, and inpatient care facilities. No local comprehensive plan or development regulation may outright prohibit the siting of these essential public facilities. The Office of Financial Management maintains a list of essential state public facilities likely to be built within the next six years.
    TagsLand Use, Legislation, RCW, State of Washington, Washington State LegislatureFolderSP #2
  • 2019-08-02

    WSDOT SR509 Phase 1 alignment noise barrier analysis summary

    This 2019 WSDOT report analyzes noise barriers along the SR509 Phase 1 highway alignment near the Sea-Tac area, evaluating whether proposed sound walls meet feasibility and cost-reasonableness standards. Wall 3 was rejected because it could not achieve the required 5 dB noise reduction for nearby residents. Wall 4 met the technical noise-reduction threshold but was ultimately rejected because its estimated cost of $111,478 exceeded the allowable budget of $72,254.
    TagsNoise Mitigation, SR509, State of Washington, WSDOTFolderSR-509
  • 2019-01-01

    Seattle Times 2019 Concept Map of Pacific Northwest High-Speed Rail Stations

    A 2019 concept map published by The Seattle Times (credit: Mark Nowlin) showing potential bullet train stations between Portland, Oregon and Vancouver, British Columbia, including stops at Seattle, Tacoma, Everett, Bellevue/Redmond, and other Northwest cities. The accompanying text notes Washington, in partnership with British Columbia and Oregon, proposed a study costing up to $348 million to plan high-speed rail infrastructure; sources cited are Esri, Washington State Department of Transportation, and WSP.
    TagsMap, non-aviation transportation, Seattle Times, State of WashingtonFolderFederal

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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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