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Municipal Technical Advisory Service (MTAS)

ISO Ratings of TN Fire Departments

Reference Number: MTAS-413
Reviewed Date: 08/25/2023

Graph depicting ISO PPC ratings in Tennessee.

Of the 838 ISO-classified communities in Tennessee, 78, or 9.31 percent, are grade 9, as they meet only minimum standards.

The Tennessee ISO ratings are consistent with national ratings, as more than 13 percent of the fire districts in the United States have a Class 9 rating, which indicates the minimum recognized standard of fire protection.