EX-21 13 c81504exv21.htm EXHIBIT 21 Filed by Bowne Pure Compliance
Exhibit 21
UniSource Energy Corporation Subsidiaries
         
    State or Other Jurisdiction of  
Subsidiary   Incorporation or Organization  
 
        
Tucson Electric Power Company (TEP)
   Arizona
TEP Subsidiaries:
        
San Carlos Resources Inc.
   Arizona
 
        
UniSource Energy Services, Inc. (UES)
   Arizona
UES Subsidiaries:
        
UNS Electric, Inc.
   Arizona
UNS Gas, Inc.
   Arizona