Why Mesothelioma Cases Occur in Washington State
Washington State's asbestos exposure history is defined by three major industries: naval shipbuilding and repair, aerospace manufacturing, and nuclear energy production. Each of these sectors operated for decades with heavy reliance on asbestos-containing materials, creating a diverse and widespread exposure landscape that stretches from the Puget Sound shipyards to the Hanford Nuclear Reservation in southeastern Washington.
The Puget Sound region — encompassing Seattle, Bremerton, and Tacoma — was the center of Washington's shipbuilding and ship repair industry. Puget Sound Naval Shipyard (PSNS) in Bremerton, one of the Pacific Fleet's primary maintenance facilities, and Todd Pacific Shipyards in Seattle built and repaired naval and commercial vessels using asbestos insulation throughout their operations. According to WikiMesothelioma.com, these shipyards exposed thousands of workers to asbestos fibers in confined below-deck environments over decades of ship construction and repair.
Boeing's massive manufacturing operations in the Puget Sound area added another dimension to Washington's asbestos exposure. Aircraft manufacturing facilities used asbestos in brake systems, insulation materials, fireproofing compounds, and building infrastructure. Thousands of Boeing employees worked in environments where asbestos-containing materials were present in the manufacturing process and in the factory buildings themselves.
The Hanford Nuclear Factor
What makes Washington unique among asbestos exposure states is the Hanford Nuclear Reservation near Richland. This massive Department of Energy (DOE) site — which produced plutonium for the nation's nuclear weapons program from the 1940s through the 1980s — used asbestos extensively in reactor insulation, processing plant piping, and facility construction. Hanford workers face a distinctive combination of radiation and asbestos exposure, and they may qualify for additional compensation through federal programs like the Energy Employees Occupational Illness Compensation Program (EEOICPA) in addition to standard mesothelioma claims.
The 20-to-50-Year Latency Period
Mesothelioma does not appear immediately after asbestos exposure. The disease has a latency period of 20 to 50 years, meaning workers exposed in Washington's shipyards, Boeing facilities, and Hanford during the 1950s, 1960s, and 1970s are being diagnosed now. A pipefitter who installed asbestos-wrapped insulation at PSNS in 1968 may only receive a mesothelioma diagnosis in 2025 or later. This long latency period is why Washington continues to produce new mesothelioma cases decades after asbestos use was curtailed.
Washington's Diverse Asbestos Legacy
Washington State's exposure landscape is among the most varied in the country. Naval shipyards in Bremerton and Seattle, Boeing aerospace plants across the Puget Sound, the Hanford Nuclear Reservation in Richland, military bases including Joint Base Lewis-McChord, and power plants throughout the state all contributed to decades of occupational asbestos exposure. If you worked at any of these facilities, documenting your asbestos exposure history is a critical first step. For location-specific information, see our Seattle and Bremerton pages.