Editor's Summary: On December 11, 1980, President Jimmy Carter signed into law CERCLA, commonly referred to as Superfund, creating a federal program to clean up our nation's most polluted hazardous waste sites. Today, every state and nearly every territory of the United States has at least one Superfund site within its borders. In this Article, John Quarles and Michael Steinberg examine the first 25 years of the Superfund program. In so doing, they provide insight as to where this program may lead in the future.