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Guam NPDES Permits

EPA's Pacific Southwest (Region 9) issues all NPDES permits within the Pacific Island territory of Guam.

Draft and Final NPDES Permits

The table(s) below contain all final (i.e. active) and draft (i.e. proposed) NPDES permits issued by EPA's Pacific Southwest (Region 9) within Guam. It includes permits for individual facilities, general permits, and stormwater permits. Click on the facility/permit name to view the permit and supporting documents.

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Draft NPDES Permits in Guam

Facility / Discharger Location Permit Number Permit Status
There are no draft permits at this time.      

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Final NPDES Permits in Guam

Facility / Discharger Location Permit Number Permit Status Effective Date Expiration Date
Municipal Separate Storm Sewer System
Department of the Navy (DON)
Naval Base Guam GUS040000 Final 2019/02/01 2024/01/31
Municipal Separate Storm Sewer System
Guam Department of Public Works
Naval Base Guam GUS040001 Final 2019/02/01 2024/01/31
General Permit for Bulk Fuel Storage Facilities in Guam Guam GUG000001 Final 2019/04/01 2024/03/31
Agat-Santa Rita WWTP
Guam Waterworks Authority
Hagatna GU0020222 Final 2020/01/01 2024/12/31
Cabras Power Plant
Guam Power Authority
Piti GU0020001 Final 2020/01/01 2025/01/31
Agana/Hagatna Sewage Treatment Plant
Guam Waterworks Authority
Agana GU0020087 Final
301(h) Variance Request
2020/01/01 2024/12/31
Umatac-Merizo Sewage Treatment Plant
Guam Waterworks Authority
Merizo GU0020273 Final 2020/01/01 2024/12/31
Cabras Marine Corporation
Cabras Marine Corporation
Piti GU0020397 Final 2018/08/01 2023/07/30
Northern District Sewage Treatment Plant
Guam Waterworks Authority
Harmon Annex GU0020141 Final
301(h) Variance Request
2020/01/01 2024/12/31
Ugum Surface Water Treatment Plant
Guam Waterworks Authority
Talofofo GU0020371 Final 2016/09/01 2021/08/31
Fena Water Treatment Plant
U.S. Navy, Naval Base Guam
Santa Rita GU0020389 Final 2017/04/01 2022/03/31
Apra Harbor WWTP
U.S. Navy, Naval Base Guam
Santa Rita GU0110019 Final 2017/05/01 2022/04/30
Unitek Environmental Guam Waste Transfer Facility
Unitek Environmental Guam
Piti GU0020346 Final 2017/09/01 2022/08/31