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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(121)

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  • Electrical conduit installation at metal building exterior

    Exterior electrical installation showing EMT conduit runs supported by green conduit supports on gravel, connecting to a junction box and terminating at a service panel labeled 'Main Service Shut Off, 100A 120/240V 1-Phase.' A bare copper grounding conductor runs along the building's corrugated metal wall.
    TagsAir Quality Monitors, King County, North Sea-Tac Park, NSTP, PSCAA, Sunset Park
  • PSCAA Sunset Park Air Quality Monitoring Site — April 11, 2025 (8:33 PM)

    TagsAir Quality Monitors, King County, North Sea-Tac Park, NSTP, PSCAA, Sunset Park
  • 2025-04-01

    PSCAA Ultra Fine Particulate (UFP), SMPS Monitoring web page

    Under Construction! Notes: – Particles are counted at 1 or 2.5 minutes per scan of the full size bin range – To select an earlier date, select a time button – SeaTac North monitoring began early April 2025 Other notes: – Data have been smoothed in both dimensions, with a gaussian filter. – There are
    CategoriesFrom The Web TagsAir Quality Monitors, PSCAA, Ultrafine Particulates
  • 2025-03-21

    Window Condensation and Moisture Issues

    Three images showing window condensation and moisture problems, including water droplets on glass surfaces and what appears to be mold or moisture damage on window frames and glass panels.
    Tagsair filtration, Air Quality Monitors, Port Packages
  • 2025-03-21

    Window Types – Sliding and Double-Hung Window Features

    Annotated comparison photo showing two residential window types: a sliding window (top) with gray plugs at top and bottom of the frame meet point, and a double-hung window (bottom) with gray plugs on both sides, with green circles highlighting the plug locations. This appears to be a technical reference document, possibly related to window sound insulation or weatherproofing assessment.
    CategoriesResources Tagsair filtration, Air Purifiers, Air Quality Monitors, Port Packages
  • 2025-02-21

    Seattle Port Container Terminal with City Skyline

    Aerial view of the Port of Seattle's container terminal yard packed with intermodal shipping containers bearing visible logos including Maersk, Maersk Sealand, CMA CGM, Hamburg Süd, Hapag-Lloyd, MSC, and UASC. The Seattle skyline, including the Space Needle and a Ferris wheel (Seattle Great Wheel area), is visible in the background along Elliott Bay.
    TagsAir Quality Monitors, Airport, Atmosphere, Port Of Seattle
  • 2025-02-14

    Washington State Air Pollution Map – Airport Communities

    A map of Washington State identifying 16 communities with elevated cumulative criteria air pollution levels, including locations such as Spokane, Tacoma, Seattle, Yakima Valley, and Vancouver. The map uses a shading gradient to indicate highest to lowest pollution levels, with numbered red markers pinpointing each named community.
    CategoriesExplainers, Resources TagsAir Quality Monitors, Airport Communities Coalition, Airport Impacted Communities Act, airport issues, Airports, Aviation Emissions
  • Gettyimages 1259132714
    2025-01-22

    The Air Quality Index and how to use it, explained

    by Rebecca Leber Updated Jan 22, 2025, 10:49 PM UTC Worsening wildfires mean everyone should have a basic understanding of how to read and respond to the Air Quality Index. It’s a good idea to reduce outdoor exercise on hazardous air days to cut down on exposure.Kamil Krzaczynski/AFP via Getty Images Rebecca Leber was a
    CategoriesFrom The Web TagsAir Quality Monitors, Climate, Policy, Vox
  • 2025-01-21

    Senate Bill 5380 – Environmental Justice Act

    Senate Bill 5380, introduced in the Washington State 69th Legislature's 2025 Regular Session by Senators Lovelett, Trudeau, Hasegawa, Nobles, Saldaña, Stanford, and Valdez, aims to increase environmental justice by improving government decisions. The bill directs the Department of Ecology to add environmental justice as an element of the environment within state environmental review rules (WAC 197-11-444 and WAC 197-11-960), amending RCW 70A.15.2210 and adding new sections to chapter 43.21C RCW.
    CategoriesLegislation Tags2026 legislative session, Air Quality Monitors, Airport Impacted Communities Act
  • 2025-01-21

    Senate Bill 5380 – Environmental Justice in Government Decisions

    Senate Bill 5380, introduced in Washington State's 69th Legislature during the 2025 Regular Session by Senators Lovelett, Trudeau, Hasegawa, Nobles, Saldaña, Stanford, and Valdez, aims to increase environmental justice by improving government decisions. The bill amends RCW 70A.15.2210 and adds new sections to chapter 43.21C RCW, requiring the Department of Ecology to add environmental justice as an element within SEPA environmental review rules (WAC 197-11-444 and WAC 197-11-960).
    CategoriesLegislation Tags2026 legislative session, Air Quality Monitors

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Upcoming Events

  • StART SEA Stakeholder Advisory Round Table
    Add to CalendarMWednesday Aug 26, 5:00pm - 7:00pm
    Zoom (Virtual Meeting)
    START meetingagenda 2026826 final 0 pdf

    Meeting Objectives Introduce the primary feedback themes identified by StART members regarding StART’s Operating Procedures and determine areas that may warrant future discussion. 5:00 PM – Welcome Meeting Management Welcome Lead: Andrés Mantilla, Facilitator, Uncommon Bridges; Wendy Reiter, Airport Managing Director, POS 5:15 PM – Dinner: All participants eat. 5:30 PM – StART Operating Procedures

    [...]
  • Commercial Aviation Work Group
    Add to CalendarMThursday Sep 3, 10:00am - 1:30pm
    Virtual Meeting (Zoom)
    Cawg agenda sep 3 26 virtual pdf

    Meeting Agenda 10:00 a.m. – 10:15 a.m. | Welcome – Evan Nordby, Chair a. Introductions and Agenda Reviewb. Status of appointments and non-voting member invitationsc. Other updates as necessary 10:15 a.m. – 11:00 a.m. | Is it practical and legal to operate the western Washington [Puget Sound] airports as a single airport system? – Consultant

    [...]

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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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