Public Protection Classification (PPC) is the countrywide classification system used by the Insurance Services Office (ISO) to grade a community's local fire protection. This grade is then used to set property insurance rates. The public fire protection of a community is graded using ISO's Fire Suppression Rating Schedule to develop the community's classification. The PPC rating is based on:
Emergency communications systems, including facilities for the public to report fires, staffing, training, certification of telecommunicators, and facilities for dispatching fire departments
The fire department, including equipment, staffing, training, and geographic deployment of fire companies
The water supply system, including the inspection and flow testing of hydrants and a careful evaluation of the amount of available water compared with the amount needed to suppress fires
Community efforts to reduce the risk of fire, including fire prevention codes and enforcement, public fire safety education, and fire investigation programs
The City of Decatur has been assigned a PPC rating of 3/8B. The first number of this split classification is the PPC for structures within 1,000 feet of a fire hydrant and five road miles of a fire station. The second number is for structures more than 1,000 feet from a fire hydrant but within five road miles of a fire station.