| Title | Type | Year | State | Status |
| FINAL Environmental Assessment and Finding of No Significant Impact for Maritime Environmental Data Sampling System, Strait of Georgia and Semiahmoo Bay, WA | Environmental Assessment | 2024 | WA | Final |
| FINAL Environmental Assessment and Finding of No Significant Impact for the Department of Homeland Security Science and Technology Directorate’s Undersea Cable Installation, Plum Island, NY | Environmental Assessment | 2024 | NY | Final |
| FINAL Environmental Assessment and Finding of No Significant Impact for FLETC Land Acquisition and Transfer, and Construction and Operation of New Driving Track and Solar Array at the Federal Law Enforcement Training Centers in Artesia, NM | Environmental Assessment | 2024 | NM | Final |
| FINAL Supplemental Environmental Assessment and Finding of No Significant Impact for the Acquisition of land, construction, operation, and maintenance of a New Joint Processing Center in Laredo, Webb County, Texas | Environmental Assessment | 2024 | TX | Final |
| FINAL Programmatic Environmental Assessment and Finding of No Significant Impact for the Nationwide Operation of Small Unmanned Aircraft Systems | Environmental Assessment | 2024 | Nationwide | Final |
| FINAL Environmental Assessment and Finding of No Significant Impact for Detection Sciences Testing and Applied Research and Facility for Energetic Material Research Projects Transportation Security Lab Federal Aviation Administration, William J. Hughes Technical Center Egg Harbor Township, Atlantic County, NJ | Environmental Assessment | 2024 | NJ | Final |
| Final Notice and Public Explanation of a Proposed Activity in a 100-Year Floodplain- Dormitory Construction at Immigration and Customs Enforcement Krome Service Processing Center - Miami, FL | Notice of Public Explanation | 2024 | FL | Final |
| Final Notice and Public Explanation of a Proposed Activity in a 100-Year Floodplain- Lease of Office and Related Space and Installation of an Electronic Security System in Forty-Fort, PA | Notice of Public Explanation | 2024 | PA | Final |
| FINAL Environmental Assessment and Finding of No Significant Impact for the Proposed Land Purchase, and Construction, Operation, and Maintenance of a Joint Processing Center in Yuma, Yuma County, AZ | Environmental Assessment | 2023 | AZ | Final |
| FINAL Supplemental Environmental Assessment and Finding of No Significant Impact for the Construction, Operation, and Maintenance of a New Joint Processing Center in El Paso, El Paso County, Texas | Environmental Assessment | 2023 | TX | Final |
| FINAL Environmental Assessment and Finding of No Significant Impact for Joint Processing Center, Eagle Pass, TX | Environmental Assessment | 2023 | TX | Final |
| FINAL Environmental Assessment and Finding of No Significant Impact for Closure Activities at the Plum Island Animal Disease Center on Plum Island, NY | Environmental Assessment | 2023 | NY | Final |
| FINAL Supplemental Environmental Assessment and Finding of No Significant Impact for the United States Secret Service James J. Rowley Training Center 2023 Master Plan | Environmental Assessment | 2023 | MD | Final |
| FINAL Environmental Assessment and Finding of No Significant Impact for Proposed NYC Simulant Particle Releases for the Viral Phenomenology Program (January 2021) | Environmental Assessment | 2022 | NY | Final |
| Record of Decision of the Department of Homeland Security to Continue Headquarters Consolidation at the St. Elizabeths West Campus, Washington, DC | Environmental Impact Statement | 2022 | DC | Final |
| FINAL Environmental Assessment and Finding of No Significant Impact for Counter-Unmanned Aircraft Systems Testing at Multiple Sites | Environmental Assessment | 2022 | NY, PA, WV, NCR, DC, VA | Final |
| FINAL Environmental Assessment and Finding of No Significant Impact for Service Processing Center, El Paso, TX | Environmental Assessment | 2021 | TX | Final |
| FINAL Environmental Assessment and Finding of No Significant Impact for Proposed Tracer Particle and Gas Releases, New York City, NY | Environmental Assessment | 2021 | NY | Final |
| DHS Project JUSTICE Final Environmental Assessment | Environmental Assessment | 2021 | MS | Final |
| Environmental Assessment | 2020 | MD | Final |
| FINAL Environmental Assessment and Finding of No Significant Impact (FONSI) for Service Processing Center at Port Isabel, TX | Environmental Assessment | 2019 | TX | Final |
| FINAL Environmental Assessment for the Proposed 2017 Rowley Training Center Master Plan Update | Environmental Assessment | 2019 | MD | Final |
| DHS Adoption of GSA Environmental Impact Statements and Issuance of a Record of Decision to Unify and Consolidate DHS Headquarters facilities at the St. Elizabeths Campus, Washington D.C (March 2016) | Environmental Impact Statement | 2016 | DC | Final |
| FINAL Environmental Assessment and Finding of No Significant Impact for ICE Contract Detention Facility, Houston Area of Operations, Houston, TX (Dec 2016) | Environmental Assessment | 2016 | TX | Final |
| FINAL Environmental Impact Statement for Fort Hamer Bridge Across the Manatee River, Manatee County, FL | Environmental Impact Statement | 2016 | FL | Final |
| FINAL Programmatic Environmental Impact Statement and Record of Decisions for Northern Border, Multiple Sites (April 2013) | Environmental Impact Statement | 2014 | Multiple U.S. Border States | Final |
| FINAL Environmental Impact Statement and Record of Decision for the National Bio and Agro-Defense Facility (NBAF), Multiple Sites | Environmental Impact Statement | 2008 | GA, KS, MS, NY, NC, TX | Final |
