| Region | | Complaint Date | | Status | | Docket |
|---|
 Region 03 | | | | Closed | | RCRA-03-2022-0001 Harless Pit Stop, Inc. d/b/a Pit Stop #2 |
| Region 03 | | | | Closed | | RCRA-03-2022-0002 TNEMEC Company, Inc. |
| Region 03 | | | | Closed | | RCRA-03-2022-0005 U-SAVE Food Store, Inc. |
| Region 03 | | | | Closed | | RCRA-03-2022-0006 ANRO, Inc. |
| Region 03 | | | | Closed | | RCRA-03-2022-0009 Empire Petroleum Partners, LLC |
| Region 03 | | | | Closed | | RCRA-03-2022-0023 GVD Coating Specialists, Inc. |
| Region 03 | | | | Closed | | RCRA-03-2022-0028 Morgan Oil Corporation |
| Region 03 | | | | Closed | | RCRA-03-2022-0030 SNEH Enterprises LLC and VIRU Enterprises LLC, Summit Fuels UST Gas Station Mini Mart |
| Region 03 | | | | Closed | | RCRA-03-2022-0033 Cleveland Brothers Equipment Co., Inc. |
| Region 03 | | | | Closed | | RCRA-03-2022-0034 Voith Hydro, Inc. |
| Region 03 | | | | Closed | | RCRA-03-2022-0035 The Sherwin Williams Company |
| Region 03 | | | | Closed | | RCRA-03-2022-0036 Mars, Roshni and Raj, Inc., Chubby's BP |
| Region 03 | | | | Closed | | RCRA-03-2022-0037 United States Department of the Army, United States Army Corps of Engineers, Washington Aqueduct |
| Region 03 | | | | Closed | | RCRA-03-2022-0044 York Fuel Stop, Inc. |
| Region 03 | | | | Closed | | RCRA-03-2022-0045 Hanover 76, Inc. |
| Region 03 | | | | Closed | | RCRA-03-2022-0048 Johnstown Tube Laser, LLC d/b/a Environmental Tank & Container |
| Region 03 | | | | Closed | | RCRA-03-2022-0049 KVK Tech, Inc. |
| Region 03 | | | | Closed | | RCRA-03-2022-0050 Empire Petroleum Partners, LLC, aka EPP – Leasing I, LLC, Richmond Highway BP |
| Region 03 | | | | Closed | | RCRA-03-2022-0051 Gilbert Distributing Company, Inc. d/b/a Pit Stop #1 |
| Region 03 | | | | Closed | | RCRA-03-2022-0052 4th Elite Corporation, Thurmont Liberty |
| Region 03 | | | | Closed | | RCRA-03-2022-0053 Piramal Critical Care, Inc. |
| Region 03 | | | | Closed | | RCRA-03-2022-0060 Hillock Anodizing, Inc. |
| Region 03 | | | | Active | | RCRA-03-2022-0061CA Pennzoil-Quaker State Company dba SOPUS Products |
| Region 03 | | | | Closed | | RCRA-03-2022-0072 Nucor Insulated Panels Group, LLC |
| Region 03 | | | | Closed | | RCRA-03-2022-0074 Baltimore County, Maryland |
| Region 03 | | | | Closed | | RCRA-03-2022-0083 Kao USA Inc. |
| Region 03 | | | | Closed | | RCRA-03-2022-0102 District of Columbia Water and Sewer Authority, Blue Plains Advanced Wastewater Treatment Plant |
| Region 03 | | | | Closed | | RCRA-03-2022-0113 Yogkala Management Inc. |
| Region 03 | | | | Active | | RCRA-03-2022-0138CA Excalibur Realty Company |
| Region 03 | | | | Closed | | RCRA-03-2023-0008 Theranostix, Inc. |
| Region 03 | | | | Closed | | RCRA-03-2023-0012 Harrisburg Area Community College |
| Region 03 | | | | Closed | | RCRA-03-2023-0021 L & M Fabrication and Machine, Inc. |
| Region 03 | | | | Active | | RCRA-03-2023-0024 Wheeler & Wheeler, Inc. d/b/a West End Motors |
| Region 03 | | | | Closed | | RCRA-03-2023-0026 Gallaudet University |
| Region 03 | | | | Closed | | RCRA-03-2023-0027 Heritage Training and Shooting Center, LLC |
| Region 03 | | | | Closed | | RCRA-03-2023-0029 MetLab, Inc. |
| Region 03 | | | | Closed | | RCRA-03-2023-0031 Ailya Chemical Corporation |
| Region 03 | | | | Closed | | RCRA-03-2023-0033 Walmart, Inc., Walmart Distribution Center #7034 |
| Region 03 | | | | Closed | | RCRA-03-2023-0039 Advance Stores Company, Inc., Advance Auto Distribution Center |
| Region 03 | | | | Closed | | RCRA-03-2023-0044 Sigmapharm Laboratories LLC |
| Region 03 | | | | Active | | RCRA-03-2023-0046CA Transport Pool Corporation (former General Electric Railcar Repair Services
Corporation Property) |
| Region 03 | | | | Closed | | RCRA-03-2023-0050 E.G.E. Corporation, Kenilworth Red Top Gas Station |
| Region 03 | | | | Closed | | RCRA-03-2023-0054 Divya Enterprise LLC, Sunrise Mart |
| Region 03 | | | | Closed | | RCRA-03-2023-0065 TD88 LLC t/a Baymart, Baymart Liquors |
| Region 03 | | | | Closed | | RCRA-03-2023-0071 Harry Parsons d/b/a Canal Boatyard, Tradestyle: Fisherman’s Wharf |
| Region 03 | | | | Closed | | RCRA-03-2023-0081 Bashir Naseem Corporation, Freedom Citgo |
| Region 03 | | | | Closed | | RCRA-03-2023-0091 Palram Americas, Inc. |
| Region 03 | | | | Closed | | RCRA-03-2023-0094 Amar Petroleum Inc. and Hans Gill, LLC, Roxy Gas & Snacks |
| Region 03 | | | | Closed | | RCRA-03-2023-0098 Merck Sharp & Dohme Corp. |
| Region 03 | | | | Closed | | RCRA-03-2023-0111 Winchester 101, LLC d/b/a Route 50 Gas Mart |
| Region 03 | | | | Active | | RCRA-03-2023-0112CA Mountain State Carbon, LLC, Mountain State Carbon Coke Plant |
| Region 03 | | | | Closed | | RCRA-03-2023-0119 Tastepoint Inc. |
| Region 03 | | | | Closed | | RCRA-03-2023-0123 Alloy Surfaces Company, Inc. |
| Region 03 | | | | Closed | | RCRA-03-2023-0128 Amuneal Manufacturing Corp. |
| Region 03 | | | | Closed | | RCRA-03-2023-0139 Gene’s Orange Market, LLC |
| Region 03 | | | | Closed | | RCRA-03-2023-0140 Davis GMC Truck, Inc. |
| Region 03 | | | | Closed | | RCRA-03-2023-0141 SPS Technologies, LLC |
| Region 03 | | | | Closed | | RCRA-03-2023-0142 Frederick Northup, Inc. |
| Region 03 | | | | Closed | | RCRA-03-2023-0145 Fowler Oil Co. d/b/a Uptown Shell |
| Region 03 | | | | Closed | | RCRA-03-2024-0014 Entegris, Inc. |
| Region 03 | | | | Closed | | RCRA-03-2024-0015 R.M. Roach & Sons, Inc. |
| Region 03 | | | | Closed | | RCRA-03-2024-0018 Maryland Department of Public Safety and Correctional Services, |
| Region 03 | | | | Closed | | RCRA-03-2024-0022 Agilent Technologies, Inc. |
| Region 03 | | | | Closed | | RCRA-03-2024-0023 OMNOVA North America, Inc. |
| Region 03 | | | | Closed | | RCRA-03-2024-0024 Southern Galvanizing Company |
| Region 03 | | | | Closed | | RCRA-03-2024-0031 T & D Quick Stop, Inc. |
| Region 03 | | | | Closed | | RCRA-03-2024-0038 Halifax County School Board |
| Region 03 | | | | Closed | | RCRA-03-2024-0064 Meritus Health, Meritus Medical Center |
| Region 03 | | | | Closed | | RCRA-03-2024-0065 Energy Transfer Marketing & Terminals L.P., Marcus Hook Industrial Complex |
| Region 03 | | | | Closed | | RCRA-03-2024-0073 Tech Met, Inc. |
| Region 03 | | | | Active | | RCRA-03-2024-0081RA Max Environmental Technologies, Inc. |
| Region 03 | | | | Closed | | RCRA-03-2024-0083 Smithsonian Institution, Smithsonian National Museum of Natural History |
| Region 03 | | | | Active | | RCRA-03-2024-0097 Northern Virginia Electric Cooperative |
| Region 03 | | | | Closed | | RCRA-CAA-03-2018-0128 United States Department of the Army, Tobyhanna Army Depot, RCRA, CWA, CAFO |
| Region 03 | | | | Closed | | RCRA-FIFRA-03-2023-0143 GROWMARK FS, LLC |
| Region 03 | | | | Closed | | RCRA-HQ-2020-501 Demand for Pre-Agreed Upon Penalties - Bloom Energy Corporation |
| Region 03 | | | | Active | | RCRA-HQ-2024-001 The Chemours Company FC, LLC, Washington Works |
| Region 03 | | | | Closed | | SDWA-03-2017-0173DS Red Jacket Energy, LLC,, SDWA, AOC |
| Region 03 | | | | Active | | SDWA-03-2018-0068DU ARG Resources, Inc. |
| Region 03 | | | | Closed | | SDWA-03-2018-0118DS American Legion Post 907, SDWA, Administrative Order for Compliance |
| Region 03 | | | | Active | | SDWA-03-2019-0025DS United States Department of the Navy, Joint Base Anacostia-Bolling |
| Region 03 | | | | Closed | | SDWA-03-2019-0076-DS Twin Creeks LLC, SDWA, Administrative Order |
| Region 03 | | | | Active | | SDWA-03-2020-0009DU Resources Preservation, Inc. f/k/a ARG Resources, Inc. |
| Region 03 | | | | Closed | | SDWA-03-2020-0121DS Portal Hotels Site LLC d/b/a Mandarin Oriental, Washington D.C. |
| Region 03 | | | | Closed | | SDWA-03-2020-0133DS United States Department of the Navy, Washington Navy Yard, SDWA, Administrative Order on Consent |
| Region 03 | | | | Closed | | SDWA-03-2020-0134DS United States Department of the Navy, U.S. Naval Observatory, SDWA, Administrative Order on Consent |
| Region 03 | | | | Active | | SDWA-03-2022-0038DU Resources Preservation, Inc., f/k/a ARG Resources, Inc. |
| Region 03 | | | | Closed | | SDWA-03-2022-0056DS Glen Rogers Public Service District |
| Region 03 | | | | Closed | | SDWA-03-2022-0069DS Brenton County Public Service District |
| Region 03 | | | | Closed | | SDWA-03-2022-0078 Snyder Brothers, Incorporated |
| Region 03 | | | | Active | | SDWA-03-2022-0081DS National Railroad Passenger Corporation d/b/a Amtrak |
| Region 03 | | | | Active | | SDWA-03-2022-0094DS Potomac Farms LLC |
| Region 03 | | | | Closed | | SDWA-03-2022-0104DS Borough of Zelienople |
| Region 03 | | | | Closed | | SDWA-03-2022-0106DS White Sulphur Springs |
| Region 03 | | | | Closed | | SDWA-03-2022-0107DS Greater Harrison County PSD |
| Region 03 | | | | Closed | | SDWA-03-2022-0108DS City of St. Albans |
| Region 03 | | | | Closed | | SDWA-03-2022-0109DS Eastern Wyoming PSD |
| Region 03 | | | | Closed | | SDWA-03-2022-0110DS City of Williamstown |
| Region 03 | | | | Closed | | SDWA-03-2022-0141DS Mingo County Public Service District - Naugatuck |
| Region 03 | | | | Active | | SDWA-03-2022-0142DS Logan County Public Service District, Northern Regional |
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