{"id":158933,"date":"2026-09-27T01:02:00","date_gmt":"2026-09-26T19:32:00","guid":{"rendered":"https:\/\/aviationa2z.com\/?p=158933"},"modified":"2026-09-26T22:02:59","modified_gmt":"2026-09-26T16:32:59","slug":"seattle-residents-blame-delta-and-alaska-for-jet-pollution","status":"publish","type":"post","link":"https:\/\/aviationa2z.com\/index.php\/2026\/09\/27\/seattle-residents-blame-delta-and-alaska-for-jet-pollution\/","title":{"rendered":"Seattle Residents Blame Delta and Alaska for Jet Pollution, Lawsuit Gets Dismissed"},"content":{"rendered":"\n

SEATTLE-<\/strong> Alaska Airlines (AS)<\/a> and Delta Air Lines (DL)<\/a> operate major portions of traffic at Seattle-Tacoma International Airport (SEA)<\/strong>. Residents living beneath the airport\u2019s flight paths alleged that aircraft pollution was contaminating homes, soil, and surrounding communities.<\/p>\n\n\n\n

The Ninth Circuit ruled on September 23, 2026, that the residents\u2019 state-law claims are expressly preempted by Section 233 of the Clean Air Act. The decision reversed the district court\u2019s refusal to dismiss the claims and sent the case back for further proceedings.<\/p>\n\n\n\n

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Photo : 4300streetcar | Wikimedia Commons | https:\/\/commons.wikimedia.org\/wiki\/File:Alaska_Airlines_Boeing_737-900ER_N292AK_taxiing_at_Seattle-Tacoma_May_2026.jpg<\/figcaption><\/figure>\n\n\n\n

Ninth Circuit Rules on Seattle Airport Pollution Claims<\/h2>\n\n\n\n

The case, Codoni v. Port of Seattle<\/strong>, involved residents living within five miles of Seattle-Tacoma International Airport. The plaintiffs sued Alaska Air Group, Delta Air Lines, and the Port of Seattle, alleging that aircraft operations released pollutants that accumulated in nearby communities and affected people and property.<\/p>\n\n\n\n

The lawsuit was brought as a proposed class action. The complaint described a five-mile area around the airport as the \u201cContamination Zone\u201d and said the proposed resident and property classes included more than 300,000 people. Alaska and Delta were alleged to account for about 80% of flights at Sea-Tac.<\/p>\n\n\n\n

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Photo: By Eric Salard – N408AS LAX, CC BY-SA 2.0, https:\/\/commons.wikimedia.org\/w\/index.php?curid=43543100<\/figcaption><\/figure>\n\n\n\n

What Residents Alleged About Aircraft Pollution<\/h2>\n\n\n\n

The plaintiffs identified two principal sources of pollution: aircraft engine exhaust and particles from aircraft fuselages.<\/p>\n\n\n\n

According to the allegations summarized by the Ninth Circuit, engine exhaust can contain particulate matter, carbon monoxide, nitrogen dioxide, sulfur oxides, hazardous air pollutants, and certain heavy metals. The complaint also alleged that repeated expansion and contraction of aircraft fuselages during takeoff and landing can cause metal-containing particles to flake from aircraft bodies.<\/p>\n\n\n\n

The plaintiffs argued that pollution released at lower altitudes can accumulate in nearby neighborhoods before wind disperses it. They cited University of Washington research that, according to the court’s opinion, reported higher particulate pollution in communities directly beneath Sea-Tac flight paths and later found that pollution also entered classrooms in the affected area.<\/p>\n\n\n\n

These environmental allegations formed the factual basis of the residents\u2019 claims. The Ninth Circuit’s decision, however, did not determine that the alleged pollution caused the claimed health or property effects. Instead, the appeal turned on whether federal law preempted the state-law claims.<\/p>\n\n\n\n

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Photo: By Adam Moreira (AEMoreira042281) – Own work, CC BY-SA 4.0, https:\/\/commons.wikimedia.org\/w\/index.php?curid=81045963<\/figcaption><\/figure>\n\n\n\n

Claims Against Alaska Airlines, Delta and Port of Seattle<\/h2>\n\n\n\n

The amended complaint asserted several causes of action.<\/p>\n\n\n\n