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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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  • EPA News Releases Header Graphic

    Official U.S. Environmental Protection Agency (EPA) news release header graphic, featuring the EPA seal and agency name on a dark green background. This is a standard EPA press release banner used for official agency announcements.
    TagsEnvironmental Protection Agency, EPA, FAA, News, Press ReleaseFolderEPA
  • 2026-01-28

    EPA Advances Cooperative Federalism to Improve Air Quality by Taking an Important Step to Reconsider Biden-era “Good Neighbor Plan”

    Agency Proposes to Approve State Implementation Plans for Eight States January 28, 2026 Contact Information EPA Press Office (press@epa.gov) WASHINGTON – On January 27, 2026, the U.S. Environmental Protection Agency (EPA) proposed phase 1 of its reconsideration of the deeply flawed Biden-era “Good Neighbor Plan.” Under phase 1, the agency is proposing to approve eight
    CategoriesFrom The Web TagsEPA, NAAQS
  • Powerplants Socialfeature 1
    2025-11-25

    EPA asks court to strike down fine particulate air pollution standard, threatening public health and undermining obligation under Clean Air Act

    WASHINGTON – The U.S. Environmental Protection Agency (EPA) filed a motion for vacatur in the Court of Appeals for the D.C. Circuit, asking the court to strike down the health-based fine particulate matter (PM2.5) standard the agency had strengthened last year. Kentucky V EPA Motion Vacatur “EPA’s motion is a blatant attempt to avoid legal
    CategoriesFrom The Web TagsClean Air Act, Clean Air Task Force, EPA, NAAQS
  • 2025-11-24

    Respondents’ motion for vacatur

    This is a legal filing in the U.S. Court of Appeals for the D.C. Circuit in which the U.S. Environmental Protection Agency asks the court to vacate its own previously issued air quality standard, arguing that EPA lacked the statutory authority to revise the standard without completing a full review process. The case centers on National Ambient Air Quality Standards (NAAQS) under the Clean Air Act, not airport noise policy. This document does not contain information relevant to Sea-Tac Airport noise policy.
    TagsCEQ, Clean Air Act, Environmental Impact Statement, EPA, FAA, NAAQSFolderEPA
  • 2025-07-29

    In a Game-Changing Climate Rollback, E.P.A. Aims to Kill a Bedrock Scientific Finding

    If upheld in court, the repeal would make it almost impossible for future administrations to rein in greenhouse gases. By Maxine Joselow and Lisa Friedman Reporting from Washington July 29, 2025Updated 3:19 p.m. ET Lee Zeldin, the administrator of the Environmental Protection Agency, said on Tuesday the Trump administration would revoke the scientific determination that
    CategoriesFrom The Web, News Stories TagsEPA, New York Times
  • 2025-05-17

    Guidance Leaflet: PFOA in Fire-Fighting Foams

    This guidance document from Ireland's Environmental Protection Agency explains the regulations around PFAS chemicals — particularly PFOA and PFOS — found in aqueous film-forming foam (AFFF) used in fire suppression systems and extinguishers. It outlines a phased timeline of restrictions, culminating in a full ban on AFFF containing PFOA by July 4, 2025, and details the steps organizations must take to check their systems, notify the EPA, and properly dispose of non-compliant foams. Businesses holding more than 50 kg of such foam at any location are required to report their stockpiles annually to the EPA via its EDEN portal.
    TagsEnvironment, EPA, FactSheet, Fire fighting, PFASFolderFire - PFAS
  • 2025-05-16

    EPA limits Its PFAS drinking water standard to PFOA and PFOS, delays compliance timeline to 2031

    On May 14, 2025, the U.S. Environmental Protection Agency announced via press release that it will reduce the scope of its April 10, 2024 National Primary Drinking Water Regulation to the two most prevalent per- and polyfluoroalkyl (PFAS) compounds, PFOA and PFOS, and extend the compliance timeline for public water systems by two years, from
    CategoriesFrom The Web, News Stories TagsEPA, Kaplan Kirsch Rockwell, PFAS
  • Lee Zeldin, EPA Administrator, Testifying at Congressional Hearing

    TagsEPA, FAAFolderEPA
  • 2025-03-11

    The Supreme Court Holds the Clean Water Act does not Authorize EPA to Include Receiving Water Limitations in San Francisco’s NPDES Permit

    In a decision issued last week, the Supreme Court of the United States held that the United States Environmental Protection Agency (EPA) exceeded its authority by including “receiving water limitations” in a National Pollutant Discharge Elimination System (NPDES) permit, siding with the City and County of San Francisco in City & County of San Francisco
    CategoriesFrom The Web TagsClean Water Act, EPA, Kaplan Kirsch Rockwell, Litigation
  • 2025-02-24

    Trump Administration Environmental-Justice-Related Executive Orders: Potential Implications for EPA Programs

    Download PDF (415KB) | PDF Version History IF12922.5 In January 2025, President Trump issued executive orders (E.O.s) that revoked prior E.O.s, including E.O.s related to environmental justice. Another Trump Administration E.O. directed federal agencies to close environmental justice offices and cease environmental-justice-related programs. These three E.O.s could affect environmental-justice-related programs and activities administered by the
    CategoriesFrom The Web TagsCEQ, Congress.gov, Environmental Justice, EPA, Executive Orders

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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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