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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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  • SEPA iwtp project checklist august 6, 2025 signed pdf
    2025-06-26

    Environmental checklist: Seattle-Tacoma International Airport (SEA) Industrial Wastewater Treatment Plant (IWTP) Enhancement Project

    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.
    TagsDeicing, NEPA, Port Of Seattle, Sea-Tac Airport, SEPA
  • 2025-06-24

    2025 state legislative session review: briefing to Port Of Seattle Commission

    This June 2025 briefing presented to the Port of Seattle Commission reviews the outcomes of the 2025 Washington State Legislative Session, covering the state budget, major revenue legislation, and Port of Seattle policy priorities. It highlights legislative successes and ongoing work, as well as planning for the 2026 interim period. Note: this document focuses on statewide budget and Port priorities broadly and does not specifically address Sea-Tac Airport noise policy.
    TagsBudget, legislative priorities, Port Of Seattle, Port Of Seattle Commission, state legislature
  • 2025-06-24

    2025 state legislative session review: briefing to Port Of Seattle Commission

    A briefing presented to the Port of Seattle Commission on June 24, 2025, reviewing the 2025 state legislative session. The presentation covers the state budget overview, revenue package and major legislation, Port priorities including successes and work in progress, and planning for the 2026 interim. The briefing was delivered by Port staff and contract lobbyists.
    TagsBudget, legislative priorities, Port Of Seattle, Port Of Seattle Commission, state legislature
  • 2025-06-24

    2025 State Legislative Session Review

    The Port of Seattle's 2025 State Legislative Session Review summarizes key outcomes from Washington's 105-day legislative session, which addressed a $10–$15 billion budget deficit through new revenue measures. For Sea-Tac Airport, notable developments include funding for sustainable aviation fuel research and infrastructure, a $134k allocation for aircraft noise repair and replacement program operations, and a $1 million sweep of noise-related repair and replacement grants to the general fund. Several environmental and emissions-related bills affecting airport and maritime operations did not pass but are expected to be reintroduced in 2026.
    Tags2026 legislative session, Port Of Seattle, SAF, Sustainable Aviation Fuels, Washington State Legislature
  • 2025-06-24

    2025 State Legislative Session Review

    This Commission Agenda Memorandum from the Port of Seattle’s Senior State Government Relations Manager provides a summary of the 2025 Washington State Legislative Session, including the Port’s priority budget and policy agenda items. The session ended April 27, 2025, with 1,949 bills introduced and 431 passed, amid a $10-15 billion state deficit. The memo covers
    Tags2026 legislative session, Port Of Seattle, SAF, Sustainable Aviation Fuels, Washington State Legislature
  • 2025-06-24

    Port Of Seattle regular commission meeting agenda, June 24, 2025

    The Port of Seattle Commission held its regular meeting on June 24, 2025, covering a range of business items including airport infrastructure projects at Seattle-Tacoma International Airport. Of particular relevance to noise policy, the Commission considered authorizing a $250,000 contract with Maritime Blue for the Quiet Sound Program, a noise-reduction initiative that had been postponed from a May 2025 meeting. The agenda also included approval of capital improvement projects and routine financial obligations for the port.
    TagsPort Of Seattle, Port Of Seattle Commission, pos_rm_2025_01_14, Quiet Skies Puget Sound, Sea-Tac Airport
  • 2025-06-24

    Port Of Seattle regular commission meeting agenda, June 24, 2025

    Agenda for the Port of Seattle Regular Commission Meeting held on June 24, 2025, conducted both virtually via MS Teams and in person at Seattle-Tacoma International Airport. The agenda includes special orders recognizing Pride Month, consent agenda items covering meeting minutes, claims and obligations, and capital improvement project authorizations, as well as unfinished business regarding
    TagsPort Of Seattle, Port Of Seattle Commission, pos_rm_2025_01_14, Quiet Skies Puget Sound, Sea-Tac Airport
  • 2025-06-20

    Port of Seattle’s Precipitous 30 Percent Cargo Decline

    By Mike Merritt -The Port of Seattle and its maritime partner, the Port of Tacoma, could be forgiven for thinking the Trump Administration has singled them out for punishment. The ports are both suffering from a combination of Trump Administration tariffs on foreign goods, crackdown on DEI programs, and get-tough immigration policies. The Northwest Seaport
    CategoriesFrom The Web TagsPort Of Seattle, Post Alley
  • 2025-06-09

    Sea-Tac Airport Part 150 DNL Noise Contour Maps: 2022 vs. 2032 Projected Conditions

    A Port of Seattle presentation slide comparing DNL noise contour maps for Seattle-Tacoma International Airport (SEA) for 2022 and projected 2032 conditions, showing 65 dB, 70 dB, and 75 dB contours overlaid on aerial maps of surrounding communities including Burien, SeaTac, Normandy Park, Tukwila, and Renton. The 2032 map shows expanded noise contours relative to 2022, with reference to the Current Noise Remedy Boundary and SEA Property and Port Authority land.
    TagsDNL65, Noise Countour, Part 150, Port Of Seattle, Sea-Tac Airport
  • 2025-05-28

    Port Of Seattle City Partnerships Program Background Presentation – May 28, 2025

    A Microsoft Teams hybrid meeting displays a PowerPoint slide titled 'Background' describing the Port of Seattle's non-competitive city funding program, which began in 2016 to support local and regional economic development. Key program parameters include per capita funding formula with a minimum of $10,000 and maximum of $60,000, a requirement for cities to develop economic development projects tied to Port business interests, and a 50 percent match requirement for Port funding.
    TagsEconomic Development Partnership Program, Highline Forum, local government funding, Port Of Seattle, Presentation

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Upcoming Events

  • KCIA 2026 FOD Walk
    Add to CalendarMSaturday Aug 15, 7:30am - 10:00am
    9404 East Marginal Way South, Seattle, WA 98108
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    Museum of FlightSeattle, WA Saturday, August 15  •  7:30 AM – 10 AM Overview Join us for the KCIA 2026 FOD Walk—let’s keep the runway clean and have some fun together! Join Us for the KCIA 2026 FOD Walk! Get ready to step out and enjoy an awesome in-person event all about keeping our spaces

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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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