TagWater Quality(53)
-
2026-07-15Sea-Tac Communities Plan: Water quality, airport, and community development
The Sea-Tac Communities Plan outlines strategies to improve compatibility between Seattle-Tacoma International Airport and surrounding neighborhoods, focusing on water quality, drainage, and land use. Key programs include public acquisition of noise-impacted residential areas for open space and recreation, conversion of single-family zones to higher-density or commercial uses, and reinforcement of existing neighborhoods through noise remedy and infrastructure improvements. The plan also addresses environmental concerns such as stream protection, holding pond systems for stormwater management, and pollution control near Miller and Des Moines Creeks. -
2026-07-15Sea-Tac Communities Plan: Water quality, airport, and community development
The Sea-Tac Communities Plan outlines strategies to improve compatibility between Seattle-Tacoma International Airport and surrounding neighborhoods, focusing on water quality, drainage, and land use. Key programs include public acquisition of noise-impacted residential areas for open space and recreation, conversion of single-family zones to higher-density or commercial uses, and reinforcement of existing neighborhoods through noise remedy and infrastructure improvements. The plan also addresses environmental concerns such as stream protection, holding pond systems for stormwater management, and pollution control near Miller and Des Moines Creeks. -
2025-06-26Environmental checklist: Seattle-Tacoma International Airport (SEA) Industrial Wastewater Treatment Plant (IWTP) Enhancement Project
The Port of Seattle is proposing upgrades to Seattle-Tacoma International Airport's Industrial Wastewater Treatment Plant (IWTP) to better handle wastewater from aircraft deicing operations, with construction planned from 2026 to 2030. The project involves replacing aging treatment equipment at the existing facility and building a new aerated gravel bed (AGB) treatment system on a 10.6-acre site nearby to process high levels of biochemical oxygen demand (BOD) on-site. These upgrades are required to comply with tightening discharge limits set by King County and state environmental permits. -
2025-01-28SEPA Environmental Checklist: Sea-Tac Airport Water System Plan Limited Update (January 2025)
This is Port of Seattle SEPA File No. 2025-01, an Environmental Checklist dated January 28, 2025, for the Seattle-Tacoma International Airport (SEA) Water System Plan (Limited Update). The document covers WDOH approval and Port adoption of the plan, with an implementation period of 2025–2028, and is prepared by contact Steve Rybolt, Senior Environmental Program Manager. -
-
Des Moines Creek Water Quality Monitoring Program, King County – DNRP
The Des Moines Creek benthos sampling is part of a larger Des Moines Creek Water Quality Monitoring Program that began in 2012. This program is designed to monitor and assess water quality in Des Moines Creek and will follow three broad goals: • Understand the status and trends of water quality and ecological health of -
Our Transition to Fluorine-Free Foam
Randy Krause October 2023 The Port of Seattle Fire Department continues on a five-year journey to find the safest, most efficient aircraft firefighting foam (AFFF) replacement and make Seattle-Tacoma International (SEA) one of the first U.S. airports to complete the steps for the transition after federal approval. In 2018, it was obvious the FAA would -
Tribes call for national ban on salmon-killing chemical in car tires
by John Ryan Three Northwest tribes have petitioned the federal government to ban a salmon-killing chemical found in tires and urban streams worldwide. As car and truck tires wear and leave behind skid marks and tire dust, the rubber stabilizer known as 6PPD turns into 6PPD-quinone (also called 6PPD-q), one of the most toxic substances -
2023-03-01Seattle Public Utilities total coliform rule monthly report for Port Of Seattle/Seatac Airport – March 2023
This Seattle Public Utilities water quality report covers routine Total Coliform Rule monitoring at Seattle-Tacoma International Airport (Sea-Tac) for March 2023. A total of 52 water samples were collected from airport locations including the A Concourse, Rental Car Facility, Utility Tunnel, and satellite terminals, with all samples testing absent for total coliform and E. coli bacteria. The system met all regulatory standards, achieving 100% detectable chlorine levels and an average chlorine residual of 1.01 mg/L across the monitoring period. -
2022-09-12Corps aquatic resource functional assessment by project area
This document assesses the ecological functions of wetlands and aquatic resources in the Miller Creek and related basins near Sea-Tac Airport, evaluating their roles in water quality, flood storage, and wildlife habitat. Wetlands in the Runway Safety Area and Vacca Farm areas are rated across functions such as nutrient trapping, groundwater exchange, and habitat for fish, waterfowl, amphibians, and small mammals. The assessment finds that interconnected wetland complexes like Lake Reba provide high-value flood attenuation and baseflow support for Miller Creek, while farmed wetlands perform at lower functional levels due to sparse vegetation and agricultural runoff.