Over the past 20 years, the perception of groundwater resources in the Northern Apennines has shifted significantly. Once considered a region of "poor hydrogeology" compared to the Alps and Central-Southern Apennines, now some of their main aquifer units are recognized as a high-quality, climate-resilient strategic resource. This renewed interest has been driven by scientific research along with the support from public water companies (Gruppo Hera, Montagna 2000) and direct hydrogeological observations from railway and highway tunnel excavations, providing new insights into groundwater flow systems active within the main fractured aquifers: shallow marine Miocenic arenites, foredeep silico-clastic or calcareous Paleogenic and Neogenic turbidites and Jurassic ophiolites (peridotites and basalts). This communication presents a synthesis of quantitative aquifer parametrization, covering both intrinsic properties (hydraulic transmissivity and conductivity, specific yield, spring recession behaviour, effective groundwater velocity and kinematic porosity derived from tracer tests) and climate-related parameters including direct recharge and discharge per unit area. It’s relevant, for example, the higher value of specific discharge (per unit outcropping area of the aquifer) of Pantano calcarenitic formation, in the range 5-7 L/s on km2, around twice respect to turbiditic deposits, in the range 2-4 L/s on km2. These parameters serve as critical inputs for hydrological modeling to determine sustainable withdrawal rates during droughts. Furthermore, the findings and associated conceptual models will contribute to the development of new guidelines for quantitative hydrogeological mapping, coordinated and financed by ISPRA and applied to “Hydrogeological Sheet n°218 Castelnovo ne’Monti” which is being carried out under the scientific supervision of the Hydrogeology group at the University of Bologna in collaboration with the Geological Survey of Emilia-Romagna region.