Almost the entire portion of Quezon is classified as deep well area with a small portion of barangay Barucboc, having the lowest point of elevation in the entire municipality, belonging in the shallow area. Quezon s underlain with sedimentary rock formations the dominant being recent depositions of alluvium. This covers much of the municipality except in the Barucboc-Estrada area which is underlain with sandstone. The unconsolidated nature of the sandstone layers in these areas could account for the relatively shallow depth to the water data, since in general sandstones’ permeability allow good infiltration of water.