DRIVING A SEA CHANGE Item No. 11b_supp Meeting Date: June 23, 2026 Environment & Sustainability Annual Report 2025 June 2026 Sandra Kilroy, Sr. Director, E&S Sarah Cox, Director, Aviation E&S Sarah Ogier, Director, Maritime E&S Mallory Hauser, Program Manager, E&S Communications and Reporting 1 Environment & Sustainability BOLD LEADERSHIP PARTNERSHIPS DATA DRIVEN EQUITY STEWARDSHIP OPPORTUNITY 2 Building a Sustainable and Resilient Port 1. Reduce emissions, waste, and other environmental effects from Port operations 2. Continue leading edge programs to steward our land and water resources, remediate contaminated properties and manage stormwater to protect water quality 3. Deliver permitting and regulatory compliance to ensure sustainable and resilient port operations and infrastructure 4. Build Port's influence in state, national and international environmental policy 5. Establish Port as a premier regional agency to attract clean fuels for maritime and aviation 6. Engage communities and increase partnerships with stakeholders 3 2025 Accomplishments REMOVED PFAS SHORE POWER FAST CHARGERS 6,800 TREES INSTALLED AT SEA RECORD UTILIZATION SALMON HABITAT CREATED PNW2AK GREEN CORRIDOR GREEN METHANOL STUDY PROGRAMMATIC PERMITS ADAPTSEA CRUISE BIOFUEL DEMONSTRATION PROJECT & SHRUBS PLANTED QUIET SOUND SEATTLE WATERFRONT CLEAN ENERGY STRATEGY 68,000 TONS CONSTRUCTION WASTE DIVERTED SOUND INSULATION REPAIR & REPLACE PILOT PROGRAM REDUCTION IN PORT CONTROLLED EMISSIONS $3M IN FEDERAL CLEAN PORTS FUNDING 4 Reporting Categories 1. Healthy Lands and Habitat 2. Cleaning Up Contaminated Sites 3. Protecting Water Quality 4. Reducing Waste 5. Charting the Course to Zero 6. Building Resilient and Sustainable Infrastructure 7. Environmental Permitting and Planning 8. Lessening the Impact of Aircraft Noise 9. Practicing Equity, Diversity, and Inclusion 10. Engaging the Community 5 HEALTHY LANDS AND HABITATS Construction completed along Miller Creek • 450 feet of Salmon habitat • 1.4 acres of floodplain create • Fish barrier replaced Protecting wildlife • Monitoring underwater noise for our Southern Resident killer whales 6,800 trees and shrubs planted Habitat and kelp research 6 CLEANING UP CONTAMINATED LANDS $23M in cost recovery East Waterway Enters Final Design • A significant regulatory milestone was reached in 2025 Leading on PFAS Elimination • 11,800 gallons in 2025 Clean up work active at multiple sites: Investigation Design Clean Up Monitoring 8 2 1 7 7 PROTECTING WATER QUALITY Met maritime stormwater permit requirements Met over 99% of airport stormwater permit conditions 31 derelict vessels removed or resolved Upgraded Remotely Operated Vehicle now enables high-resolution 3D mapping Maritime stormwater system rehabilitation progress 73% 75% goal by 2035 8 REDUCING WASTE Municipal Solid Waste Diversion (60% goal) 47% (4,481 tons) of waste from SEA terminals 59.7% (1,792 tons) of waste from maritime facilities Construction Waste Diversion (90% goal) 99% from SEA Airport capital projects 93.7% Maritime capital projects Expanded Reuse/Recycle/Donation • 25,000 meals and 3,000 lbs. of personal care products donated • 1,590 tons of waste collected for composting; 14% increase from 2023 • 177 tons (46,028 gallons!) of cooking oil recycled into renewable diesel and SAF 9 RESILIENT AND SUSTAINABLE INFRASTRUCTURE Low-carbon infrastructure in action • SEA C Concourse expansion • South Concourse Evolution, in design • Maritime Innovation Center - Constructed to Living Building standard 6 major projects, 738,000 square feet, are pursuing prestigious third-party certifications 10 CHARTING THE COURSE TO ZERO | SCOPE 1 & 2 Scope 1 & 2 GHG • 44% reduction from the 2005 baseline Port-wide Scope 1 & 2 Emissions (2024) 30,000 28,000 26,000 Renewable Natural Gas • Bridge strategy, leveraging technology while building electric infrastructure for tomorrow's zero-emission operations 22,000 20,000 18,000 Metric Tons CO2 Feasibility study completed • Evaluation of SEA's central mechanical plant and decarbonization alternatives 24,000 16,000 14,000 2030 Target 12,000 10,000 82 electric fleet vehicles (13% AV fleet, 14% Maritime fleet) & progress on EV charging infrastructure 8,000 6,000 4,000 2,000 0 2005 2015 2016 2017 2018 2019 2020 2021 2022 2023 44% reduction from baseline 11 2024 CHARTING THE COURSE TO ZERO | SCOPE 3 SEA Airport GHG Emissions (2024) 1000K 950K 900K 850K 800K Highest-ever PCA connection rates • 63% of aircraft operations connected • Alaska increased connections 10% and Delta increased by 6% compared to 2024 750K 700K • 10 fast chargers installed for TNC's at SEA • 22% of TNC activity at SEA is now electric, up from <1% in 2020 Metric Tons CO2 650K 600K 550K 500K 450K 400K 350K 300K 250K 200K 150K 100K 50K 0K 2015 2016 2017 2018 2019 2020 2021 2022 15% increase from baseline 2023 2024 Policy Wins for Sustainable Aviation Fuel • State funding for SAF research and development • Federal extension to Section 45Z Clean Fuel Production Credit through 2031 12 CHARTING THE COURSE TO ZERO | SCOPE 3 140K Seaport and Economic Development GHG Emissions (2024) 130K 120K 110K 100K Metric Tons CO2 90K 80K 70K 60K 50K 40K 30K 20K 10K 0K 2005 2007 2011 2015 2016 2017 2018 2019 *2020 2021 2022 Updated Puget Sound Emissions Inventory (PSEI) data 31% increase from baseline 2023 Advancing electrification and sustainable maritime fuels • Secured EPA Planning Grant • Launched Sustainable Fuel Collaborative • Final Seattle Waterfront Clean Energy Strategy • Green Corridor - Feasibility Study progress 2024 *No cruise, only grain ships included in Ocean Going Vessel emissions (2021 PSEI used as proxy) 13 CHARTING THE COURSE TO ZERO | SCOPE 3 Cruise At Berth GHG Reduction ~54% reduction with shore power Avg. At-Berth GHG Per Ship Without Shore Power First full year with all three cruise berths equipped with shore power • A record 68% of all cruise calls plugged in • 44% connections increase from 2024 • 70% of homeport calls connected • 203 connections avoided 6,400 MT CO2e and 1.74 MT of diesel particulate matter Avg. At-Berth GHG Per Ship With Shore Power 14 ENVIRONMENTAL PLANNING AND PERMITTING Sustainable Airport Master Plan • FAA published the Final NEPA Environmental Assessment Comprehensive Repair and Maintenance Permit for Maritime • 10-year permit secured! AdaptSea Waterfront Resilience Partnership & Duwamish River Sea Level Rise Recommendations Report completed 15 LESSENING THE IMPACT OF AIRCRAFT NOISE Sound Insulation Repair and Replace Pilot Program • 471 homes received outreach • 117 homes acoustic tested • 5 homes tested eligible Part 150 Sound Insulation • 200 apartment units completed sound insulation • 2 places of worship underway • Technical Noise Exposure Maps for 2024 Part 150 Study completed Fly Quiet Awards 2025: Air Canada, Frontier Airlines and Icelandair 16 PRACTICING EQUITY, DIVERSITY, AND INCLUSION Investing in Diverse Businesses • Port Wide $151M (15%) in spend went to 354 WMBEs Duwamish Valley Career Navigation Program launched Environmental justice • Application of Port Equity Index to programs and projects 17 ENGAGING THE COMMUNITY Over 90 community events, including 13 boat tours $500,000 in grants from the South King and Port Communities Fund Environmental Improvements Program Strengthening tribal relationships Ongoing work with PCAT, StART and other community groups 18 THANK YOU Commissioners, Port leadership, employees, and all our partners.