By February 1994, several regional landfills in Campania had become overfilled, and Prime Minister Carlo Azeglio Ciampi declared a state of emergency and created the Committee for the Waste Emergency in Campania (Commissariato di Governo per lemergenza rifiuti in Campania'). 
By December 1999, all regional landfills had reached capacity. Reports in 2008 stated that the crisis was caused at least in part by the Camorra, the powerful Campania-based mafia, which created a lucrative business in the municipal waste disposal sector, mostly in the triangle of death. With the complicity of industrial companies, the illegal dumpers frequently mix heavy metals, industrial waste, and chemicals and household waste together, and then dump them near roads and burn them to avoid detection, leading to severe soil and air pollution. 
According to Giacomo D'Alisa et al., "the situation worsened during this period as the Camorra diversified their illegal waste disposal strategy: 1) transporting and dumping hazardous waste in the countryside by truck; 2) dumping waste in illegal caves or holes; 3) mixing toxic waste with textiles to avoid explosions and then burning it; and 4) mixing toxic with urban waste for disposal in landfills and incinerators."
A Camorra member, Nunzio Perella was arrested in 1992, and began collaborating with authorities; he had stated "the rubbish is gold." The boss of the Casalesi clan, Gaetano Vassallo, admitted to systematically working for 20 years to bribe local politicians and officials to gain their acquiescence to dumping toxic waste. Giorgio Napolitano, then President of Italian Republic, said in June 2008: