The PPC program provides important, up-to-date information about municipal fire-protection services throughout the country. ISO’s expert staff collects information about the quality of public fire protection in more than 44,000 fire districts across the United States. In each of those fire districts, ISO analyzes the relevant data and assigns a Public Protection Classification — a number from 1 to 10. Class 1 generally represents superior property fire protection, and Class 10 indicates that the area's fire-suppression program does not meet ISO’s minimum criteria.

Virtually all U.S. insurers of homes and business property use ISO’s Public Protection Classifications in calculating premiums. In general, the price of insurance in a community with a good PPC is substantially lower than in a community with a poor PPC, assuming all other factors are equal.

A community's PPC depends on:

• Fire alarm and communication systems, including telephone systems, telephone lines, staffing, and dispatching systems
• The fire department, including equipment, staffing, training, and geographic distribution of fire companies
• The water-supply system, including the condition and maintenance of hydrants, and a careful evaluation of the amount of available water compared with the amount needed to suppress fires

The PPC for the City of Granite Shoals and  the City of Highland Haven  is a 4  and the unincorporated areas have a split raiting of a  4/9.  For the areas with a split rating, the lower rating applies to those properties within 1000 ft of a fire hydrant or a creditable water source (Insurance company dependant) and 5 miles of a fire station.