Contact GPA

Main Phone Number (671) 648-3000 

Customer Service Call Center - 647-5787
Emergency / Trouble Call Reporting 475-1472 /3 /4
Emergency / Trouble Call Reporting Fax 475-5288

Automated Attendant 648-3000

Customer Services
Harmon Business Office 647-5787
Harmon Business Office Fax 648-3164
Hagatna Satellite Office 647-5787
Hagatna Satellite Office Fax 648-3189
Agat Satellite Office 647-5787
Agat Satellite Office Fax 565-2930

For Mailing Addresses, Business Hours and Locations Click Here.

Email Customer Service
CustomersFirst@guampowerauthority.com

Harmon Numbers
Accounts Payable 648-3072
Accounts Receivable 648-3075
Automated Attendant 648-3000
Budget 648-3068
Chief Financial Officer 648-3066
Communications and Public Information 648-3089
Computer Services 648-3060
Controller 648-3123
Customer Service 647-5787
Engineering 648-3205
Facilities 648-3083
General Manager 648-3225
Human Resources 648-3130
Internal Auditor 648-3090
Payroll 648-3127
Plant Accounting 648-3076
Planning and Regulatory 648-3209
Procurement 648-3054/5
Safety 648-3056

Harmon Fax Numbers
Accounting/Finance Fax 648-3168
Customer Services Fax 648-3164
Engineering/P&R/Safety 648-3167
General Manager/ Executive Fax 648-3290
Human Resources Fax 648-3160
Internal Audit Fax 648-3163
Communications and Public Information Fax 648-3166
Procurement Fax 648-3165

Generation Administration
Generation Administration Office 475-5213
Cabras #1 & #2 475-5249
Cabras #3 & #4 475-5272
Central Maintenance 475-5237
Combustion Turbine Administration 300-8306
Diesel Administration 300-8312
Water Systems Diesel 475-5243

Generation Administration Fax Numbers
Generation Administration Fax 475-5216
Cabras #1 - #4 Fax 475-5216
Combustion Turbine Administration Fax 637-7849
Diesel Administration Fax 565-8000
Water Systems Diesel Fax 475-5216

Transmission & Distribution
Office 635-2000/637-4100
Fax 637-6759
T&D Overhead 635-2000/637-4100
T&D Underground 635-2000/637-4100
T&D Substation 635-2000/637-4100
Supply Warehouse 635-2071~7

Transportation 300-8319/20

Customer Service Mailing Addresses, Business Hours and Locations

CUSTOMER SERVICE CENTER
P O Box 21868
Barrigada Guam 96921
Phone: 647-5787

Harmon Main Office
1911 Rte 16 Harmon
Monday-Friday 7am-6pm
Closed on Weekends & Holidays
Phone: 647-5787
Fax: 648-3164

Agat Satellite Office
Mayor’s Office Complex Agat
Monday-Friday 8am-1pm and 2pm-5pm
Closed on Weekends & Holidays
Phone: 647-5787
Fax: 565-2930

Hagatna Satellite Office
Julale Shopping Center Ste 103, 424 West O’Brien Drive
Monday-Friday 8am-5pm
Closed on Weekends & Holidays
Phone: 647-5787
Fax: 648-3189

Back to Phone Numbers Click Here

Email the WebMaster
webmaster@guampowerauthority.com