**5.2 Volcano hazards**

Given the state of the Alban Hills volcanic system and the presence of volcanic materials in Aprilia (the volcanic soils of Aprilia are remodeled, but some in-place material remains), there is clear evidence that an explosive eruption such as those produced by the Alban Hills could easily reach the city of Aprilia. The presence of products associated with the occurrence of peripheral volcanic activity in numerous perforations (pyroclastic rocks and travertines arranged on numerous horizons) causes us to hypothesize the regional existence of evolved volcanism capable of influencing the geochemical characteristics of the waters of the Pontine slopes.
