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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.

TagAtmospheric Science(5)

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  • 2025-10-03

    UFP-Advisory-Group-Meeting-2025.10

    ★
    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, Meetings, Regular Events TagsAir Purifiers, Air Quality Monitors, Airport Communities Coalition, Atmospheric Science, Aviation Emissions
  • 2025-10-03

    Urban Ultrafine Particles – Advisory Group Meeting

    The University of Washington held an Advisory Group Meeting on October 3, 2025, focused on urban ultrafine particles (nano-particles) and their sources, including aviation-related emissions near areas like Sea-Tac Airport. The meeting aimed to foster dialogue, address knowledge gaps from the MOV-UP study, identify priority research questions, and guide scientific research on air quality monitoring. Advisors were asked to provide feedback on study design and methodology, with a time commitment including annual meetings and optional review of study outputs.
    CategoriesMeetings, Regular Events TagsAcademic Journals, Air Quality Monitors, Airport, Atmospheric Science, Aviation Emissions
  • 2025-09-15

    SMPS Particle Bin Counts and Geometric Mean at SeaTac North

    This contour plot displays Scanning Mobility Particle Sizer (SMPS) particle bin counts (log10 scale, 2.6–5.0) by particle size (5–382 nm) and local PST time (08:31–12:54) at the SeaTac North monitoring station on September 15, 2025. Brown diamond markers indicate the geometric mean particle diameter over time, generally ranging between approximately 15–30 nm. The chart was generated at 13:08:16 local time on 2025-09-15, with last UTC data at 19:54:26.
    TagsAir Quality Monitors, Airport, Atmospheric Science
  • 2023-05-08

    Long-term exposure to ultrafine particles and natural and cause-specific mortality

    This study examined whether long-term exposure to ultrafine air particles (UFP) is linked to higher death rates among 10.8 million Dutch adults followed from 2013 to 2019. Researchers found that higher UFP exposure was significantly associated with increased risk of natural cause, lung cancer, and respiratory disease mortality, even after accounting for other air pollutants like nitrogen dioxide and fine particles. The findings suggest UFP pose health risks independent of other regulated air pollutants, though this research is unrelated to airport noise policy.
    TagsAcademic Journals, Atmospheric Science, Environment, Health, UFP
  • 2014-09-03

    Estimates of HVAC filtration efficiency for fine and ultrafine particles of outdoor origin

    Department of Civil, Architectural and Environmental Engineering, Illinois Institute of Technology, Chicago, IL, USA Received 31 July 2014, Revised 26 August 2014, Accepted 3 September 2014, Available online 4 September 2014. Abstract This work uses 194 outdoor particle size distributions (PSDs) from the literature to estimate single-pass heating, ventilating, and air-conditioning (HVAC) filter removal efficiencies
    CategoriesFrom The Web TagsAtmospheric Science, HEPA Filters, indoor air quality, MERV, Science Direct, Ultrafine Particulates
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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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