Based on the study, Quezon is classified into two categories namely: deep and shallow well areas. Shallow well areas generally consist of recent formations with slopes ranging from zero to three percent. Most of these areas are located at elevations within 50 meters above mean sea level, like alluvial and coastal plains and river valleys. Shallow wells may also have deep-water aquifer and are less susceptible to salt water intrusion. Deep well areas generally consist of sedimentary formations, 90 percent of which are water carriers, These are usually located in slopes reaching up to 10%, usually at elevations of more than 50 meters above sea level. The waters from deep wells are in general, of good quality.