🌬️EPA Approves Guam Air Plan
The Environmental Protection Agency (EPA) is finalizing an approval of a revision to the Guam state implementation plan (SIP). This revision governs the Guam Environmental Protection Agency's (GEPA) issuance of permits for stationary sources and focuses on the preconstruction review and permitting of major sources and major modifications under the Clean Air Act (CAA or "the Act").
Learn More🌬️Final Rule on Clean Data Determination for Sulfur Dioxide in Guam
The Environmental Protection Agency (EPA) is taking final action on a clean data determination (CDD) for the Piti-Cabras, Guam sulfur dioxide (SO<INF>2</INF>) nonattainment area ("Piti-Cabras area") based on our determination that the area has attained the 2010 1-hour SO<INF>2</INF> National Ambient Air Quality Standard (NAAQS, "standard," or "2010 SO<INF>2</INF> NAAQS"). In designated nonattainment areas where air quality data demonstrate that a NAAQS has been attained, the EPA interprets certain requirements of the Clean Air Act (CAA) as no longer applicable for so long as air quality continues to meet the standard. Under this Clean Data Policy, the EPA may issue a determination of attainment, known as a CDD, that a nonattainment area is attaining the relevant NAAQS. This CDD suspends the obligation to submit certain attainment planning requirements for the Piti-Cabras area for as long as the area continues to attain the 2010 SO<INF>2</INF> NAAQS or until the area is formally redesignated. This CDD does not constitute redesignation of the area to attainment. This action is being taken under the CAA.
Learn More⛵Temporary Safety Zone Established for Naval Salvage Operation in Guam
The Coast Guard is establishing a temporary safety zone for certain navigable waters of Apra Harbor, Guam and adjacent Philippine Sea. The moving safety zone will include all navigable waters within 100 yards of the USNS SALVOR and M/V VOYAGER during Dead Ship Tow operations. This action is necessary to protect personnel, vessels, and the marine environment from potential hazards associated with the salvage, towing, and disposal of an abandoned, derelict vessel. Entry of vessels or persons into this zone is prohibited unless specifically authorized by the Captain of the Port, Guam.
Learn More✈️Record of Decision for Enhanced Air and Missile Defense System on Guam
The MDA, as the lead agency, and the United States Army (USA), as a cooperating agency, are issuing this joint Record of Decision (ROD) to implement the construction, deployment, and operations and maintenance of the Enhanced Integrated Air and Missile Defense (EIAMD) system on Guam, a territory of the U.S. This action will enable MDA and USA to meet their congressional mandate for a persistent 360-degree layered Integrated Air and Missile Defense capability on Guam to address the rapid evolution of missile threats from regional adversaries. Specifically, this ROD documents the decision made, alternatives considered, and discussions of all related and anticipated impacts. In addition to the USA, the United States Air Force (USAF), United States Navy (USN), and Federal Aviation Administration (FAA) are participating as cooperating agencies due to their jurisdiction or special expertise as it pertains to certain components of the selected alternative or for potentially affected operations and resources. The ROD details significant environmental impacts, outlines mitigation measures, and identifies the environmentally preferred alternative.
Learn More✈️F-15 Beddown Infrastructure Upgrades at Andersen AFB Decision
On July 16, 2025, the Department of the Air Force (DAF) signed the Record of Decision (ROD) for the F-15 Beddown and Infrastructure Upgrades at Andersen Air Force Base (AFB), Guam Environmental Impact Statement.
Learn More🛡️Final EIS Available for Enhanced Missile Defense System on Guam
The MDA, as the lead agency, has prepared a Final Environmental Impact Statement (EIS) for the Enhanced Integrated Air and Missile Defense (EIAMD) System on Guam. The United States (U.S.) Army (USA), U.S. Navy (USN), U.S. Air Force (USAF), and the Federal Aviation Administration (FAA) are cooperating agencies in the development of the Final EIS. The Final EIS includes an analysis of the potential environmental impacts that may result from the Proposed Action to construct, deploy, and operate and maintain the EIAMD system to defend Guam against advanced missile threats. The Final EIS was prepared in compliance with the National Environmental Policy Act and in accordance with MDA, USA, USN, USAF, and FAA's implementing procedures. The procedures followed in the development of the Final EIS also supports compliance with the National Historic Preservation Act of 1966 and its implementing regulations.
Learn More🌍EPA Approves Guam Sulfur Dioxide Emissions Inventory Plan
The Environmental Protection Agency (EPA) is taking direct final action to approve a revision to Guam's State Implementation Plan (SIP) under section 110(k)(3) of the Clean Air Act (CAA or "the Act"). This revision concerns the base year emissions inventory for the Piti-Cabras, Guam sulfur dioxide (SO<INF>2</INF>) nonattainment area ("Piti-Cabras area" or NAA) for the 2010 1-hour SO<INF>2</INF> National Ambient Air Quality Standard (NAAQS, "standard," or "2010 SO<INF>2</INF> NAAQS").
Learn More🌫️EPA Proposes Approval of Guam's Sulfur Dioxide Emissions Plan
The Environmental Protection Agency (EPA) is proposing to approve a revision to Guam's State Implementation Plan (SIP) under section 110(k)(3) of the Clean Air Act (CAA or "the Act"). This revision concerns the base year emissions inventory for the Piti- Cabras, Guam sulfur dioxide (SO<INF>2</INF>) nonattainment area ("Piti-Cabras area" or NAA) for the 2010 1-hour SO<INF>2</INF> National Ambient Air Quality Standard (NAAQS, "standard," or "2010 SO<INF>2</INF> NAAQS"). We are taking comments on a proposed approval of this revision and are simultaneously publishing a final action approving this revision in a direct final rule.
Learn More🌍Proposed Clean Data Determination for Guam's Piti-Cabras Area
The Environmental Protection Agency (EPA) is proposing a clean data determination (CDD) for the Piti-Cabras, Guam sulfur dioxide (SO<INF>2</INF>) nonattainment area ("Piti-Cabras area") based on our determination that the area has attained the 2010 1-hour SO<INF>2</INF> National Ambient Air Quality Standard (NAAQS, "standard," or "2010 SO<INF>2</INF> NAAQS"). In designated nonattainment areas where air quality data demonstrate that a NAAQS has been attained, the EPA interprets certain requirements of the Clean Air Act (CAA) as no longer applicable for so long as air quality continues to meet the standard. Under this Clean Data Policy, the EPA may issue a determination of attainment, known as a CDD, that a nonattainment area is attaining the relevant NAAQS. If finalized, this proposed CDD would suspend the obligation to submit certain attainment planning requirements for the Piti-Cabras area for as long as the area continues to attain the 2010 SO<INF>2</INF> NAAQS or until the area is formally redesignated.
Learn More🌬️Guam Air Quality Regulation Proposal
The Environmental Protection Agency (EPA) is proposing approval of a revision to the Guam State Implementation Plan (SIP). This revision governs the Guam Environmental Protection Agency's (GEPA's) issuance of permits for stationary sources and focuses on the preconstruction review and permitting of major sources and major modifications under part D of title I of the Clean Air Act (CAA or "the Act"). We are taking comments on this proposal and plan to follow with a final action.
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