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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.

TagAir Quality Monitors(111)

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  • Uwdeohs logo banner
    2026-09-26

    Des Moines Air Quality Monitoring Station (AQMS)

    The Des Moines Air Quality Monitoring Station (AQMS) will provide long-term, community-centered measurements of ultrafine particles and other air pollutants south of Sea-Tac Airport. Building on UW’s Mobile ObserVations of Ultrafine Particles (MOV-UP) study, the station will help distinguish local aircraft-related pollution from broader regional sources. The station at a glance < 100 nm Ultrafine
    CategoriesFrom The Web TagsAir Quality Monitors, City Of Des Moines, Ultrafine Particles, UWDEOHS
  • Stni zoom bg 18 podcast youtube 1920 1280 raw
    2026-09-26

    Ep #43 Air Quality Monitoring Update (Raw!)

    A 'raw' episode to show progress on one of our main goals: establishing the first true aviation-specific air quality monitoring network in the United States. We took a big step last week with the opening of a new station in Des Moines. Sea-Tac is the only airport in America with coverage at both ends of the flight path! <strong>Learn how we got here and why this matters so much for the future of research and improving the health of everyone under the flight path.</strong>
    CategoriesNews Stories, The Airport Communities Podcast TagsAir Quality Monitors, PSCAA, The Airport Communities Podcast!, UWDEOHS
  • Stcp chapter unk pg 2 air quality measurement sites near sea tac

    STCP Air Quality Measurement Sites Near Sea-Tac Airport

    A map from the Sea-Tac Communities Plan (document reference POS 690, page 5.1.0) showing seven air quality measurement sites near Seattle-Tacoma International Airport. Sites 1–4 are ESL sites and sites 5–7 are Puget Sound Air Pollution Control Agency sites; the plan was sponsored by the Port of Seattle and King County.
    TagsAir Quality Monitors, Puget Sound Air Pollution Control Agency, Sea-Tac Airport, Sea-Tac Communities Plan, STCPFoldermaps
  • 690630597 1320385723523119 4304153053708138093 n 6

    PSCAA AQI Index

    An Air Quality Index (AQI) reference table published by the Puget Sound Clean Air Agency, showing four levels of concern (Good 0-50, Moderate 51-100, Unhealthy for Sensitive Groups 101-150, and Unhealthy 151-200) with corresponding descriptions and public health recommendations. The agency's logo is visible in the lower right corner.
    TagsAir Quality Monitors, PSCAAFolderPSCAA
  • 2026-01-16

    Airport Advisory Committee 2026 Workplan

    The Des Moines Airport Advisory Committee's draft 2026 Workplan outlines key priorities including air quality monitoring, the SEA Airport Part 150 noise study, traffic impacts, and projected increases in airport operations. The plan addresses noise mitigation measures and public education related to Seattle-Tacoma International Airport's expansion, with 2032 DNL noise contours showing affected residential and commercial areas in Des Moines reaching up to 75 decibels. This workplan reflects the committee's efforts to protect community health and quality of life amid growing airport activity.
    TagsAir Quality Monitors, Des Moines Aviation Advisory Committee, EIS, Part 150, SAMPFolderAviation Committee 2025
  • 2026-01-16

    Des Moines Aviation Advisory Committee 2026 Workplan

    This workplan outlines a community committee's priorities for addressing the impacts of Sea-Tac Airport's expansion on Des Moines, Washington. Key goals include expanding air quality monitoring, hiring a toxicologist to evaluate the airport's environmental impact statement, researching noise mitigation alternatives beyond sound insulation, and pushing for a more thorough traffic analysis. The committee also plans to conduct a community survey in 2026 to gauge public awareness of the airport's Sustainable Airport Master Plan (SAMP) and guide future outreach efforts.
    TagsAir Quality Monitors, Des Moines Aviation Advisory Committee, Part 150, SAMP, SAMP Draft SEPA EISFolderAviation Committee 2025
  • 2025-12-01

    2025 Report: Overburdened Communities Highly Impacted by Air Pollution

    A report by the Washington State Department of Ecology’s Air Quality Program examining overburdened communities that are highly impacted by air pollution. The document includes publication information, contact details for regional offices, and ADA accessibility information.
    TagsAir Quality Monitors, Environment, Environmental Impact Statement, PSCAAFolderEcology
  • 2025-11-07

    Ultrafine particles and black carbon concentrations and determinants in aircraft cabins of a French airline: Paris-aircraft study

    A French study measured ultrafine particle (UFP) and black carbon (BC) air pollution inside aircraft cabins across 16 European commercial flights, finding average concentrations of 9,122 particles/cm³ for UFP and 207 ng/m³ for BC. Pollution levels were highest during ground phases such as boarding and taxiing, then dropped during flight, with outdoor airport air identified as the primary source of cabin air pollution. These findings suggest that airport ambient air quality plays a greater role in passenger exposure than in-flight sources.
    TagsAcademic Journals, Air Quality Monitors, aircraft, indoor air quality, Ultrafine ParticlesFolderStudies
  • 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, Atmospheric Science, Aviation EmissionsFolderUWDEOHS
  • 2025-10-03

    UFP-Advisory-Group-Meeting-2025.10

    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.
    CategoriesMeetings, Regular Events TagsAir Purifiers, Air Quality Monitors, Airport Communities Coalition, Airport Impacted Communities Act, Aviation EmissionsFolderUWDEOHS

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Upcoming Events

  • Part 150 NCP Workshop — Burien
    Add to CalendarMSaturday Oct 17: 10:00am

    Attend a Port of Seattle open house on the Part 150 Study Noise Compatibility Program (NCP). The Part 150 program determines the noise boundary around the airport and opportunities for noise mitigation such as sound insulation.

    [...]
  • Part 150 NCP Workshop — SeaTac
    Add to CalendarMMonday Oct 19: 6:00pm

    Attend a Port of Seattle open house on the Part 150 Study Noise Compatibility Program (NCP). The Part 150 program determines the noise boundary around the airport and opportunities for noise mitigation such as sound insulation.

    [...]
  • Part 150 NCP Workshop — Des Moines
    Add to CalendarMTuesday Oct 20: 6:00pm

    Attend a Port of Seattle open house on the Part 150 Study Noise Compatibility Program (NCP). The Part 150 program determines the noise boundary around the airport and opportunities for noise mitigation such as sound insulation.

    [...]

[See all...]


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.
read more...

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.
continue...

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