ISO and Mutual Aid

Insurance Service Office (ISO) Rating

​Public Protection Classification: 4
Effective Date: February 1, 2018

Feature                                                    Credit Assigned      Maximum Credit    
Receiving and Handling Fire Alarms                8.35%                      10.00%
Fire Department                                               27.21%                      50.00%
Water Supply                                                     27.16%                      40.00%                            
Divergence*                                                       -2.70%
Total Credit                                                       64.82%                    100.00%


* Divergence is a reduction in credit to reflect a difference in the relative credits for Fire Department 
   and Water Supply 

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Mutual Aid

The Grantsburg Volunteer Fire Department has a written mutual aid agreement with the following fire departments:

City of Pine City Fire Department
City of Rush City Fire Department
Cushing Volunteer Fire Department
Danbury Volunteer Fire Department
Frederic Rural Fire Association
Jackson Township Fire Department
Scott Township Volunteer Fire Department
Siren Volunteer Fire Department
St. Croix Tribal - Hertel Fire Department
Webb Lake Volunteer Fire Department / Rescue
Webster Volunteer Fire Department.  

Our mutual aid partners are willing to provide resources as needed when requested, dependent on their availability.