The story of Los Angeles begins long before bright lights and movie stars. For thousands of years, the Tongva people lived along the Los Angeles River and the surrounding valleys, building thriving communities sustained by the region’s mild climate and natural resources. Spanish settlers arrived in 1781 and established El Pueblo de Nuestra Señora la Reina de los Ángeles, planting the seeds of what would become one of the world’s great cities. By the late 19th century, the arrival of the railroad and the promise of year-round sunshine helped transform Los Angeles into a booming center of opportunity and innovation.
It was in this rapidly growing city that IAPMO was born. In May 1926, a small group of Los Angeles plumbing inspectors gathered to confront the public health challenges that came with explosive urban expansion. Concerned about unsafe drainage, sewer gases, and inconsistent plumbing practices, they formed an association dedicated to developing uniform standards that would protect communities. From that modest beginning, IAPMO grew into a global organization — but Los Angeles has always remained part of its DNA. The same spirit of problem-solving and collaboration that defined the city a century ago continues to shape IAPMO’s mission today.
At the same time IAPMO was taking root, Los Angeles was entering the era that would define its global identity: Hollywood’s Golden Age. The 1920s and 1930s saw the rise of major film studios, grand movie palaces, and legendary stars. Neighborhoods like Hollywood, Beverly Hills (first to adopt the Uniform Plumbing Code, by the way), and Westwood became playgrounds for icons such as Charlie Chaplin, Greta Garbo, and Humphrey Bogart. Landmarks like the Hollywood Sign, Grauman’s Chinese Theatre, and the Sunset Strip emerged as symbols of glamour and creativity. The city’s warm weather and open spaces made it the perfect backdrop for the entertainment industry—and for the thousands of professionals who built the infrastructure to support it.
In the decades that followed, Los Angeles continued to reinvent itself. The postwar boom brought modern architecture, expanded freeways, and new industries, while cultural movements in music, art, and technology shaped the city into a global trendsetter. From Dodger Stadium to Griffith Observatory, from Olvera Street to the Santa Monica Pier, Los Angeles became a place where history, innovation, and imagination intersected every day. Just as IAPMO expanded from local roots to international influence, the city that nurtured it grew into a worldwide capital of ideas and opportunity.
As IAPMO returns to Los Angeles in 2026 to celebrate its 100th anniversary, the Annual Education and Business Conference will honor both the association’s origins and the city that helped shape them. With a theme inspired by Hollywood’s Golden Age, attendees will experience the energy, creativity, and heritage of the place where IAPMO began. From historic landmarks to vibrant neighborhoods, Los Angeles offers a living reminder that the greatest achievements can range from the glitz and glamour of Hollywood to the often unsung and sometimes unglamourous work of plumbers and other tradespeople who build things from the ground up.
