An official website of the United States government.

We've made some changes to EPA.gov. If the information you are looking for is not here, you may be able to find it on the EPA Web Archive or the January 19, 2017 Web Snapshot.

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.

Draft Permits
Facility / Discharger Location Permit Number Permit Status
General Permit (Proposed) for Bulk Fuel Storage Facilities in Guam Guam GUG000001 Draft
Municipal Seperate Storm Sewer System
Department of the Navy (DON)
Tamuning, GU GUS040000 Draft
Municipal Separate Storm Sewer System
Guam Department of Public Works
Tamuning, GU GUS040001 Draft

Final Permits
Facility / Discharger Location Permit Number Permit Status Effective Date Expiration Date
Agat-Santa Rita WWTP
Guam Waterworks Authority
Hagatna GU0020222 Final 1/1/2018 12/31/2022
Cabras Power Plant
Guam Power Authority
Piti GU0020001 Final 2/1/2013 1/30/2018
Mobil Cabras Terminal
Mobil Oil Guam, Inc.
Piti GU0020036 Final 11/1/2012 10/31/2017
South Pacific Petroleum Corporation
South Pacific Petroleum Corporation
Piti GU0020079 Final 7/1/2012 6/30/2017
Agana/Hagatna Sewage Treatment Plant
Guam Waterworks Authority
Agana GU0020087 Final
301(h) Variance Request
6/1/2013 5/31/2018
Umatac-Merizo Sewage Treatment Plant
Guam Waterworks Authority
Merizo GU0020273 Final 9/1/2015 8/31/2020
Cabras Marine Corporation
Cabras Marine Corporation
Piti GU0020397 Final 8/1/2018 7/30/2023
Piti Bulk Fuel Terminal
Guam Power Authority/Peterra, Inc.
Piti GU0020354 Final 3/1/2011 2/29/2016
Guam Shipyard
Guam Shipyard
Santa Rita GU0020362 Final 11/1/2010 10/31/2015
Northern District Sewage Treatment Plant
Guam Waterworks Authority
Harmon Annex GU0020141 Final
301(h) Variance Request
06/1/2013 5/31/2018
Baza Gardens Sewage Treatment Plant
Guam Waterworks Authority
Talofofo GU0020095 Final 9/1/2015 8/31/2018
Ugum Surface Water Treatment Plant
Guam Waterworks Authority
Talofofo GU0020371 Final 9/1/2016 8/31/2021
Tristar Guam Agat Terminal
Tristar Terminals Guam, Inc.
Agat GU0020150 Final 8/01/2015 7/31/2020
Tristar Guam F-1 Pier Terminal
Tristar Terminals Guam, Inc.
Piti GU0020338 Final 8/1/2015 7/31/2020
Fena Water Treatment Plant
U.S. Navy, Naval Base Guam
Santa Rita GU0020389 Final 4/1/2017 3/31/2022
Apra Harbor WWTP
U.S. Navy, Naval Base Guam
Santa Rita GU0110019 Final 5/1/2017 4/30/2022
Unitek Environmental Guam Waste Transfer Facility
Unitek Environmental Guam
Piti GU0020346 Final 9/1/2017 8/31/2022
University of Guam Marine Laboratory
University of Guam Marine Laboratory
Mangilao GU0020168 Final 5/1/2012 4/30/2017