| Region | | Date | | Docket Number | | Case Name | | Statute - Section |
|---|
 R03 | | 09/29/2023 | | CERCLA-03-2023-0007DC | | North Penn Area 6 Superfund Site, Parker Hannifin Corporation | | CERCLA |
| R03 | | 08/25/2023 | | CERCLA-03-2023-0064DC | | Koppers Co., Inc. (Newport) Superfund Site, Beazer East, Inc. | | |
| R03 | | 07/24/2023 | | RCRA-03-2023-0112CA | | Mountain State Carbon, LLC, Mountain State Carbon Coke Plant | | RCRA |
| R03 | | 04/27/2023 | | CWA-03-2023-0025DN | | The Chemours Company FC, LLC, Washington Works | | CWA |
| R03 | | 04/18/2023 | | CWA-03-2023-0051DW | | Panhandle Homes of Berkeley County, Inc. | | CWA |
| R03 | | 03/28/2023 | | CERCLA-03-2023-0043DC | | North Penn Area 5 Superfund Site, Operable Unit 1, BAE Systems Informa... | | CERCLA - 106(a) - Imminent and Substantial Endangerment |
| R03 | | 03/21/2023 | | CWA-03-2023-0078CW | | CSX Transportation, Inc., Sandstone, WV Train Derailment Site | | CWA |
| R03 | | 02/09/2023 | | RCRA-03-2023-0046CA | | Transport Pool Corporation (former General Electric Railcar Repair Ser... | | RCRA |
| R03 | | 01/26/2023 | | III-2001-0007-DC | | City of Philadelphia, Enterprise Avenue Landfill/Philadelphia Internat... | | |
| R03 | | 12/07/2022 | | TSCA-03-2023-0034 | | Robert Lauter d/b/a Prime Cut Paint | | TSCA |
| R03 | | 10/04/2022 | | RCRA-03-2022-0138CA | | Excalibur Realty Company | | RCRA |
| R03 | | 10/04/2022 | | SDWA-03-2022-0143DS | | Logan County Public Service District, Greenville | | SDWA |
| R03 | | 10/04/2022 | | SDWA-03-2022-0142DS | | Logan County Public Service District, Northern Regional | | SDWA |
| R03 | | 10/04/2022 | | CERCLA-03-2022-0008DC | | Teleflex Incorporated, North Penn Area 7 Superfund Site | | CERCLA |
| R03 | | 10/03/2022 | | CERCLA-03-2022-0140LL | | West Virginia Tire Disposal, Inc. Superfund Site | | |
| R03 | | 09/27/2022 | | CWA-03-2022-0031DN | | Superior Concrete Materials, Inc. | | CWA |
| R03 | | 08/24/2022 | | SDWA-03-2022-0081DS | | National Railroad Passenger Corporation d/b/a Amtrak | | SDWA |
| R03 | | 08/23/2022 | | CERCLA-03-2022-0129LL | | Lefevre Street Container Superfund Site | | |
| R03 | | 08/22/2022 | | SDWA-03-2022-0094DS | | Potomac Farms LLC | | SDWA |
| R03 | | 06/01/2022 | | CWA-03-2022-0018DN | | Red Hill Utility, LLC | | CWA |
| R03 | | 05/25/2022 | | III-94-26-DC | | Occidental Chemical Corp. Superfund Site | | |
| R03 | | 05/13/2022 | | CERCLA-03-2022-0073DC | | West Virginia Tire Disposal, Inc. | | CERCLA |
| R03 | | 03/31/2022 | | RCRA-03-2022-0061CA | | Pennzoil-Quaker State Company dba SOPUS Products | | RCRA |
| R03 | | 03/23/2022 | | CWA-03-2022-0042DN | | Town of Selbyville | | CWA |
| R03 | | 03/11/2022 | | CERCLA-03-2022-0043DC | | Desha Road Superfund Site, FDP Virginia, Inc. | | CERCLA |
| R03 | | 03/11/2022 | | CWA-03-2022-0055DN | | ZQRIC, LLC | | CWA |
| R03 | | 03/07/2022 | | CERCLA-03-2022-0066AC | | West Virginia Tire Disposal, Inc. Site, West Virginia Tire Disposal, I... | | CERCLA |
| R03 | | 02/02/2022 | | TSCA-03-2021-0057 | | Omar B. Construction LLC | | TSCA |
| R03 | | 02/02/2022 | | TSCA-03-2021-0055 | | Prominent Painters, LLC d/b/a Fresh Coat Painters of Charleston | | TSCA |
| R03 | | 02/01/2022 | | SDWA-03-2022-0038DU | | Resources Preservation, Inc., f/k/a ARG Resources, Inc. | | |
| R03 | | 01/05/2022 | | CWA-03-2022-0039DW | | Paul Goodwin | | CWA |
| R03 | | 01/05/2022 | | CWA-03-2022-0021DN | | Hanover Foods Corporation | | CWA |
| R03 | | 12/22/2021 | | CWA-03-2022-0026DN | | City of Carbondale | | CWA |
| R03 | | 12/08/2021 | | CWA-03-2022-0019DN | | Amsted Graphite Materials, LLC | | |
| R03 | | 11/30/2021 | | CWA-03-2022-0022DW | | Gary Lane and Chameleon LLC | | |
| R03 | | 10/14/2021 | | CAA-CWA-RCRA-03-2021-0024 | | Alliant Techsystems Operations, LLC, Allegany Ballistics Laboratory | | CAA |
| R03 | | 09/30/2021 | | CWA-03-2021-0044DN | | York City Sewer Authority and City of York | | |
| R03 | | 08/23/2021 | | CERCLA-03-2021-0031LL | | Erie Coke | | |
| R03 | | 08/05/2021 | | CWA-03-2021-0053DN | | City of Martinsburg, WWTP | | |
| R03 | | 07/29/2021 | | CWA-03-2021-0104FF | | John F. Kennedy Center for the Performing Arts | | |
| R03 | | 07/15/2021 | | CWA-03-2021-0110DS | | Clarksburg Water Board | | SDWA |
| R03 | | 05/14/2021 | | CWA-03-2021-0060DN | | Lehigh Cement Company | | |
| R03 | | 04/30/2021 | | CERCLA-RCRA-03-2021-0050PP
CERCLA-RCRA-03-2021-0051PP | | U.S. Steel Corp. MVW Fairless Works, NP Falls Township Industrial, LLC... | | CERCLA - Prospective Purchaser Agreement |
| R03 | | 04/13/2021 | | CWA-03-2021-0078DN | | Concrete Pipe and Precast, LLC | | |
| R03 | | 04/06/2021 | | CWA-03-2021-0035DN | | Overhead Door Corporation | | |
| R03 | | 03/02/2021 | | CWA-03-2021-0028DW | | Gary Powers | | |
| R03 | | 01/13/2021 | | RCRA-03-2021-0022TH | | National Aeronautics and Space Administration - Wallops FUDS Program, ... | | |
| R03 | | 12/10/2020 | | CWA-03-2021-0006DN | | Blessing Greenhouses and Compost Facility, Inc. | | |
| R03 | | 10/08/2020 | | RCRA-03-2013-0105CA | | ALCATEL-LUCENT USA INC., Richmond Works Facility | | |
| R03 | | 10/01/2020 | | CWA-03-2020-0067DN | | Shenandoah Municipal Sewer Authority | | |
| R03 | | 10/01/2020 | | CAA-03-2020-0118FF | | National Aeronautics and Space Administration - Wallops Flight Facilit... | | |
| R03 | | 09/23/2020 | | CWA-03-2020-0138DN | | Lehigh White Cement Company | | |
| R03 | | 09/11/2020 | | CERCLA-03-2020-0080CR | | J.H. & C.K. Eagle Mill Site, PAD Kulpmont, LLC | | |
| R03 | | 05/06/2020 | | CAA-03-2020-0095 | | AirFish Automotive, LLC | | CAA |
| R03 | | 05/05/2020 | | CERCLA-03-2020-0082DC | | AIW Frank/Mid-County Mustang Superfund Site, B&J Excavating, Inc. | | |
| R03 | | 04/09/2020 | | CWA-03-2020-0061CW | | Tangier Oil Company, Inc. | | |
| R03 | | 04/02/2020 | | SDWA-03-2020-0009DU | | Resources Preservation, Inc. f/k/a ARG Resources, Inc. | | |
| R03 | | 10/31/2019 | | RCRA-03-2020-0037TH | | Budd Site, PA Opportunity Park QOF 5 | | |
| R03 | | 10/31/2019 | | RCRA-03-2020-0036TH | | Budd Site, PA Opportunity Park QOF 4 | | |
| R03 | | 10/31/2019 | | RCRA-03-2020-0035TH | | Budd Site, PA Opportunity Park QOF 1 | | |
| R03 | | 10/08/2019 | | RCRA-03-2020-0016TH | | Budd Site, PA Opportunity Park QOF 3 | | |
| R03 | | 09/17/2019 | | CERCLA-03-2019-0111LL | | Chem Fab Superfund Site, Turog Properties, Limited | | |
| R03 | | 09/12/2019 | | CERCLA-03-2019-0120LL | | Magnate, LLC Site | | |
| R03 | | 04/18/2019 | | CERC-03-2007-0033DC | | The Folcroft Landfill and The Folcroft Landfill Annex - Lower Darby Cr... | | CERCLA - 122A/104A - Agreement for RI and/or FS |
| R03 | | 02/21/2019 | | SDWA-03-2019-0025DS | | United States Department of the Navy, Joint Base Anacostia-Bolling | | |
| R03 | | 10/25/2018 | | RCRA-03-2018-0042 | | The Former Hercules Facility | | |
| R03 | | 09/28/2018 | | RCRA-03-2018-0144CA | | Mingo Junction Steel Works, LLC, Weirton Steel facilty | | |
| R03 | | 09/28/2018 | | RCRA-03-2018-0143CA | | ArcelorMittal Weirton LLC, Weirton Steel facility | | |
| R03 | | 08/31/2018 | | CWA-03-2018-0038DN | | Pennsylvania Department of Transportation | | |
| R03 | | 08/31/2018 | | CERCLA-03-2018-0136LL | | Clearview Landfill, Lower Darby Creek Area Superfund Site | | |
| R03 | | 07/24/2018 | | RCRA-03-2018-0131 | | Silky Associates, LLC | | RCRA |
| R03 | | 07/18/2018 | | FIFRA-03-2018-0117SS | | Alex C. Ferguson, LLC | | FIFRA |
| R03 | | 06/14/2018 | | CWA-03-2018-0019DN | | Government of the District of Columbia | | |
| R03 | | 05/25/2018 | | CERCLA-03-2018-0116DC | | Delaware Sand and Gravel Landfill | | CERCLA |
| R03 | | 04/18/2018 | | SDWA-03-2018-0068DU | | ARG Resources, Inc. | | |
| R03 | | 06/14/2017 | | RCRA-03-2017-0122 | | Indmar Coatings Corporation | | RCRA |
| R03 | | 09/26/2016 | | RCRA-03-2016-0225 | | CITGO Norview Gas Station | | RCRA |
| R03 | | 09/30/2015 | | TSCA-03-2015-0258 | | Boston Design & Construction Co., Inc. | | TSCA |
| R03 | | 03/26/2015 | | TSCA-03-2015-0042 | | Robert W. Heh, Jr. Construction Company d/b/a Window Depot USA | | TSCA |
| R03 | | 06/04/2009 | | CAA-03-2009-0189 | | School District of Upper Dublin, One Source Safety and Health, Inc., S... | | CAA |
| R03 | | 09/12/2006 | | RCRA-03-2006-0059 | | Kessel Lumber Supply, Inc. | | RCRA |
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