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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.
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  • 2022-09-12

    National Pollutant Discharge Elimination System waste discharge permit No. WA-002465-1

    This document is a draft National Pollutant Discharge Elimination System (NPDES) waste discharge permit issued by the Washington State Department of Ecology to the Port of Seattle for Sea-Tac International Airport. It governs the discharge of treated industrial wastewater into Puget Sound and stormwater runoff into nearby waterways including Des Moines Creek, Miller Creek, and Walker Creek. The permit sets effluent limits, monitoring requirements, and reporting obligations to protect water quality in the receiving waters.
    TagsClean Water Act, NPDES, Port Of Seattle, RCAA, Sea-Tac Airport, StormwaterFolderRCAA
  • 2022-09-12

    Fact sheet for NPDES permit WA-002465-1: SeaTac International Airport

    This NPDES permit fact sheet for Seattle-Tacoma International Airport details the locations and receiving waterways for all stormwater and industrial wastewater discharge outfalls at the facility. It covers three categories of discharge: industrial wastewater flowing to Puget Sound, stormwater from industrial activities flowing to local waterways such as Des Moines Creek, Miller Creek, and Northwest Pond, and stormwater from construction activities discharged to Des Moines Creek, Miller Creek, Walker Creek, and Gilliam Creek. The document lists both existing and future planned outfall locations with precise latitude and longitude coordinates for each discharge point.
    TagsDes Moines Creek, NPDES, RCAA, Sea-Tac Airport, Stormwater, Water QualityFolderRCAA
  • 2005-08-24

    Letter to Ed Abbasi regarding unified position on NPDES permit modification for Seattle-Tacoma International Airport

    In August 2005, the Port of Seattle and Citizens Against SeaTac Expansion (CASE) jointly wrote to the Washington Department of Ecology presenting a unified position on proposed changes to the NPDES wastewater permit for Seattle-Tacoma International Airport. The two parties collaborated to resolve disputed permit conditions — covering issues such as BOD discharge limits and pipeline compliance schedules — and categorized each comment as requiring a permit change, a response only, withdrawal, or unresolved. Both parties agreed not to appeal any permit modifications that fell within the mutually agreed categories, aiming to avoid litigation while achieving a workable final permit.
    TagsCASE, Ecology, NPDES, Port Of Seattle, RCAA, Sea-Tac AirportFolderRCAA
  • 2005-05-10

    Addendum to fact sheet: Port Of Seattle Sea-Tac International Airport NPDES Permit No. WA-002465-1

    The Washington State Department of Ecology issued this draft addendum to address shortcomings in the NPDES wastewater discharge permit for Seattle-Tacoma International Airport, following a ruling by the Pollution Control Hearings Board. The document outlines required changes to how the Port of Seattle manages contaminated wastewater from aircraft deicing operations, including stricter pollution limits, improved treatment standards, and enhanced water quality monitoring of nearby waterways such as Miller Creek. The revisions focus on reducing harmful biochemical oxygen demand (BOD) discharges into Puget Sound and ensuring the Port implements all available pollution control measures as quickly as possible.
    TagsDeicing, NPDES, Pollution Control Hearings Board, Port Of Seattle, RCAA, Water QualityFolderRCAA
  • 2003-09-04

    National Pollutant Discharge Elimination System waste discharge permit No. WA-002465-1

    This is a National Pollutant Discharge Elimination System (NPDES) water discharge permit issued by the Washington State Department of Ecology to the Port of Seattle for Seattle-Tacoma International Airport, effective October 1, 2003 through September 4, 2008. The permit governs how the airport is authorized to discharge industrial wastewater and stormwater runoff into surrounding water bodies, including Puget Sound, Des Moines Creek, Miller Creek, and Walker Creek. It sets out special conditions covering discharge limitations, monitoring requirements, toxicity testing, and operations and maintenance standards to protect water quality in the region.
    TagsClean Water Act, NPDES, Port Of Seattle, Puget Sound, RCAA, StormwaterFolderRCAA
  • 2003-09-04

    National Pollutant Discharge Elimination System waste discharge permit No. WA-002465-1

    This is a National Pollutant Discharge Elimination System (NPDES) waste discharge permit issued by the Washington State Department of Ecology to the Port of Seattle for SeaTac International Airport, originally effective October 1, 2003. The permit regulates the discharge of industrial wastewater and stormwater into receiving waters including Puget Sound, Des Moines Creek, Miller Creek, Walker Creek, and other local waterways. It sets effluent limits, monitoring requirements, and operational standards for the airport's Industrial Wastewater System to protect water quality in the surrounding region.
    TagsNPDES, Port Of Seattle, Puget Sound, RCAA, Stormwater, Water QualityFolderRCAA
  • 2003-09-04

    Notice of appeal and request for stay pending appeal

    The Port of Seattle filed a Notice of Appeal against the Washington State Department of Ecology challenging the terms of a 2003 water discharge permit issued for Seattle-Tacoma International Airport (Sea-Tac). The permit, which governs industrial wastewater and stormwater runoff from airport operations and construction activities, was contested by the Port as imposing undue burdens without corresponding environmental benefits. Over the following six years, the Port faced more than $150 million in projected costs to implement water quality and stormwater control measures under the permit's requirements.
    TagsNPDES, Pollution Control Hearings Board, Port Of Seattle, RCAA, Sea-Tac Airport, StormwaterFolderRCAA
  • 2003-07-03

    Documents catalogued as published in 2003

    This is a library catalog page listing five legal and regulatory documents from 2003 related to environmental permitting and litigation. The documents include an NPDES water discharge permit (No. WA-002465-1) issued by the Department of Energy, and three entries related to a legal case (ACC v. Colonel Graves) involving a Section 404 appeal and motions for summary judgement filed through the Army Corps of Engineers. A comment letter on the NPDES Draft Permit is also catalogued.
    TagsACC, Airport Communities Coalition, Army Corp of Engineers, Clean Water Act, NPDES, RCAAFolderRCAA
  • 2003-03-31

    Workshop and public hearing: Port Of Seattle, Seattle-Tacoma International Airport water quality permit reissuance

    The Washington State Department of Ecology held a public workshop and hearing on March 31, 2003, to discuss the proposed reissuance of a water quality permit for Seattle-Tacoma International Airport. The permit covers industrial wastewater discharges to Puget Sound and stormwater runoff to nearby creeks from airport activities such as aircraft maintenance, fueling, washing, and deicing. Written public comments were accepted through April 15, 2003.
    TagsEcology, NPDES, RCAA, Sea-Tac Airport, Stormwater, Water QualityFolderRCAA
  • 2003-03-31

    Response to comments: NPDES proposed waste discharge permit no. WA-002465-1, Port Of Seattle, Seattle-Tacoma International Airport

    This document is a public responsiveness summary from Washington State's Department of Ecology regarding an NPDES wastewater discharge permit issued to the Port of Seattle for Seattle-Tacoma International Airport. It compiles and responds to comments received during a March 2003 public meeting and hearing, covering concerns about the airport's treated industrial wastewater, stormwater runoff, and construction runoff discharges. The summary addresses feedback from a range of stakeholders, including the Port of Seattle, local legislators, advocacy groups, and individual residents.
    TagsNPDES, Port Of Seattle, RCAA, Sea-Tac Airport, Stormwater, Water QualityFolderRCAA

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Upcoming Events

  • Stay Grounded Event: Night trains, not night planes!
    Add to CalendarMSunday Sep 13: 12:00am
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    For the past two years, more than 220 initiatives from 15 countries have declared September 13th as the International day for the ban of night flights at airports. In parallel, activists across Europe have been gathering for pyjama parties for night trains – coordinated in 2024 and 2025 by Back on Track and Stay Grounded.

    [...]
  • Burien Airport Committee Meeting September 15, 2026
    Add to CalendarMTuesday Sep 15: 6:00pm
    400 SW 152nd St, Burien, WA 98166
    Burien airport committee 15 sep 2026 agenda pdf pdf

    a) Part 150 Noise Study (Emily Inlow-Hood) — 15 minutes
    b) SAMP Update and Next Steps (Brian Davis and Sarah Moore) — 15 minutes
    c) Legislative Updates — 10 minutes
       • SCA (Sarah Moore)
       • Work with Sen. Orwall (Brian Davis)
    d) StART Reorganization (Jeff Harbaugh and Karen Veloria) — 10 minutes

    [...]

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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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