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STNI
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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.

TagAviation Emissions(19)

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  • Cd9464C39116769B1F1C213A3A63Bc935C5B889E

    D.C. Circuit Court of Appeals Cracks Down on FAA Compliance with NEPA

    Article discusses a D.C. Circuit Court of Appeals decision that addresses FAA compliance with the National Environmental Policy Act (NEPA). The court appears to have made rulings that strengthen environmental review requirements for aviation projects.
    CategoriesLitigation, News Stories TagsAirport Expansion, Airport Law, Airport Noise Law, ANCA, Aviation Committees, Aviation Emissions
  • 2025-10-29

    SAF Pathway Comparison Chart

    A comparison chart showing different Sustainable Aviation Fuel (SAF) pathways including HEFA-SPK, FT-SPK, Alcohol-to-Jet, and Power-to-Liquid/e-fuels. The chart compares feedstock sources, emissions reduction potential, scalability, and implementation notes for each pathway.
    CategoriesExplainers TagsAlternative Fuels, Aviation Emissions, Aviation Fuel
  • 2025-10-03

    Urban Ultrafine Particles Advisory Group Meeting

    Meeting minutes from the UFP Advisory Group discussing research priorities for ultrafine particle health effects, mitigation strategies, and exposure reduction in aviation-impacted communities. Participants included University of Washington researchers, public health officials, school district representatives, and community leaders focusing on air quality and health impacts near Sea-Tac Airport.
    CategoriesKey Documents, Regular Events TagsAir Purifiers, Air Quality Monitors, Airport Communities Coalition, Airport Impacted Communities Act, Aviation Emissions
  • 2025-10-03

    Urban Ultrafine Particles – Advisory Group Meeting

    Meeting agenda for University of Washington advisory group focused on urban ultrafine particles research. The 3-hour meeting covers partner updates, UW research highlights, policy landscape review, regional monitoring enhancements, and open forum discussion to address knowledge gaps from the MOV-UP study.
    CategoriesRegular Events TagsAcademic Journals, Air Quality Monitors, Airport, Atmospheric Science, Aviation Emissions
  • 2025-10-03

    Urban Ultrafine Particles – Advisory Group Meeting

    Advisory group meeting presentation focused on urban ultrafine particles, likely related to aviation emissions and air quality impacts on airport communities. The meeting appears to be part of ongoing research or policy discussions regarding particulate matter from aircraft operations.
    CategoriesKey Documents, Regular Events TagsAir Purifiers, Air Quality Monitors, Airport Communities Coalition, Atmospheric Science, Aviation Emissions
  • 2025-10-01

    Impacts of Aviation Emissions on Air Quality Near Hanscom Field, Bedford, Massachusetts – Results of a Two-Season Monitoring Campaign

    A comprehensive study measuring ultrafine particles, lead, and other air pollutants from aviation emissions at Hanscom Field across four surrounding Massachusetts towns. The study found that UFP concentrations were up to two-fold higher at downwind sites and often exceeded WHO guidelines, with the highest impacts in Bedford and Lexington.
    TagsAcademic Journals, Air Quality Monitors, Airport, Aviation Emissions, MassPort, Neelakshi Hudda, StudyStudy TopicsAir Quality, Ultrafine Particles
  • 2025-09-15

    SMPS Particle Bin Counts and Geometric Mean at 10th&Weller

    A scientific chart showing SMPS (Scanning Mobility Particle Sizer) particle bin count measurements and geometric mean data collected at the 10th & Weller monitoring location over a 24-hour period. The contour plot displays particle size distribution data from 5nm to 382nm, with logarithmic color scaling showing particle concentrations from September 15, 2025.
    CategoriesResources TagsAir Quality Monitors, Airport, Aviation Emissions
  • 2025-08-16

    Aircraft Flying Over Seattle Metropolitan Area

    Aerial view showing commercial aircraft flying over the Seattle metropolitan area with Mount Rainier visible in the background. The image depicts multiple aircraft including what appears to be commercial jets flying over the city’s urban landscape and waterways.
    Tagsaircraft, Airline Industry, Airport, Aviation Emissions
  • 2025-02-14

    Washington State Air Pollution Map – Airport Communities

    Map of Washington State showing cumulative levels of criteria air pollution with numbered markers indicating 16 airport-impacted communities. The map uses green shading to represent pollution levels from highest to lowest, with communities like Ellensburg, Everett, South King County, and others marked with red numbered circles.
    CategoriesExplainers, Resources TagsAir Quality Monitors, Airport Communities Coalition, Airport Impacted Communities Act, airport issues, Airports, Aviation Emissions
  • 2024-05-18

    2025 Federal Aviation Reauthorization Wins for Washington – Alternative Aviation Fuel Investments

    Announcement of provisions in the 2025 Federal Aviation Reauthorization bill focused on advancing aviation technology and sustainability through the Airport Improvement Program. The bill includes studying electric and hydrogen-powered aircraft integration, expanding alternative fuels research, and developing coordinated strategies for new aviation fuel systems to protect airport communities.
    CategoriesLegislation, Press Release TagsAdam Smith, AIP, Airport Improvement Program, Alternative Fuels, Aviation Emissions, Aviation Fuel

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Upcoming Events

  • Port of Seattle Commission Meeting – Resolution No. 3848
    Add to CalendarMTuesday Apr 28: 12:00am
    Port of Seattle

    Agenda Item 10b Resolution No. 3848: Port of Seattle Participation in City of Bellevue Tax Increment Area Approval of the Port’s participation in the city of Bellevue’s tax increment area, as authorized under RCW 39.114.020. Key Points: Authorization for City of Bellevue to enact increment area up to $500,000,000 in combined assessed valuation if connected

    [...]
  • Port of Seattle Regular Commission Meeting April 28, 2026
    Add to CalendarMTuesday Apr 28: 12:00pm
    17801 International Blvd, Seattle, WA 98158
    2026 04 28 RM Packet Pdf 1

    # New Business Items
    **Order No. 2026-04:** Directs Executive Director to explore a program facilitating secure area access for union business requirements at Seattle-Tacoma International Airport.

    **Resolution No. 3848:** Approves Port's participation in City of Bellevue's Tax Increment Area.

    **Fishermen's Terminal C-15 Building Improvements:** Authorization for Executive Director to approve funding to advertise and execute a major public works construction contract for project completion.

    [...]
  • StART (SEA Stakeholder Advisory Round Table) Meeting
    Add to CalendarMWednesday Apr 29, 5:00pm - 7:00pm
    Zoom Webinar
    Start Meetingagenda 2026429 Pdf 1

    - **SAMP Environmental Review**: Detailed comparison between SEPA Environmental Impact Statement and NEPA Environmental Assessment processes for Near-Term Projects
    - **Community Roundtable Updates**: Progress report on airport stakeholder engagement initiatives
    - **Next Steps**: Implementation timeline for environmental review findings

    **Notable Action Item:**
    Public comment period opened for stakeholder input on airport development plans.

    [...]

[See all...]


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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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This is the first study to combine a one-year mobile monitoring campaign with PMF (Positive Matrix Factorization) analysis to simultaneously estimate source-specific air pollution exposures and emission factors of different vehicle types. This methodology can be extended to other metropolitan areas.
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