An aquifer protection area is categorized as either a preliminary (level B) or final (level A) aquifer protection area, depending on the quality of mapping. Preliminary mapping provides a general estimate of the area contributing ground water to the well field. Final mapping is based on extensive, site-specific, detailed modeling of the ground water flow system at the well field. For a given aquifer protection area, this information includes either the preliminary or more detailed final mapping. Aquifer protection areas are represented as polygon areas and mapped for use at 1:24,000 scale (1 inch = 2,000 feet).