| Back River Waste Water Trtmnt Plant | 6 | 345 | 91,980.00 |
| Tate & Lyle North American Sugars | 7 | 313 | 1,639,659.10 |
| Millenium Inorganic Chemicals | 13 | 276 | 14,830,810.71 |
| Fmc Corp. Organic Chemicals Division | 38 | 264 | 258,046.18 |
| Sherwin-Williams Company | 20 | 213 | 404,301.20 |
| Pemco Corporation | 13 | 181 | 509,309.80 |
| Kaydon Ring & Seal Inc. | 11 | 158 | 74,053.38 |
| Grace - Davison Chemical | 11 | 137 | 690,835.40 |
| National Gypsum | 7 | 134 | 411,099.10 |
| General Motors Truck & Bus Group | 17 | 132 | 1,036,702.00 |
| Amerada Hess Terminal | 16 | 131 | 341,750.94 |
| Wheelabrator Baltimore Lp | 33 | 129 | 3,002,046.06 |
| Gaf Building Products | 10 | 115 | 244,098.42 |
| Victor Graphics | 7 | 104 | 18,404.00 |
| Sinai Hospital Of Baltimore | 13 | 104 | 155,049.15 |
| Trigen - Leadenhall Street | 6 | 96 | 186,091.36 |
| Clean Harbors Of Baltimore | 6 | 84 | 31,390.00 |
| Red Star Yeast | 8 | 80 | 745,060.70 |
| Cpsg Gould Strret | 47 | 78 | 3,575,056.97 |
| Carr-Lowrey Glass | 7 | 72 | 270,635.00 |
| Johns Hopkins - Homewood Campus | 6 | 72 | 88,325.00 |
| Petroleum Fuel & Terminal Company | 11 | 70 | 81,257.21 |
| Vac Pac Manufacturing | 7 | 69 | 18,100.00 |
| Citgo-Star - Terminal | 10 | 68 | 123,510.00 |
| Conocophillips Baltimore Terminal | 11 | 56 | 66,672.00 |
| Sasol North America, Inc. | 17 | 55 | 841,765.11 |
| Petroleum Fuel & Terminal Company | 10 | 54 | 108,308.00 |
| Johns Hopkins Hospital | 5 | 50 | 396,136.00 |
| Cpsg Philadelphia Road | 6 | 48 | 159,336.00 |
| Trigen - North Central Avenue | 6 | 48 | 144,620.00 |
| Tnemec Company | 13 | 43 | 42,276.00 |
| Phoenix Services Incorporated | 17 | 34 | 354,419.21 |
| United States Gypsum Company | 6 | 33 | 557,628.60 |
| Furst Brothers Company | 6 | 33 | 14,300.00 |
| Lucas, John D. Printing | 9 | 30 | 25,558.00 |
| Lenmar, Inc. | 13 | 29 | 106,652.00 |
| Motiva Terminal | 13 | 26 | 217,240.00 |
| Unilever Home & Personal Care | 5 | 26 | 81,900.00 |
| National Graphics | 6 | 24 | 14,094.00 |
| Automatic Rolls | 3 | 24 | 20,156.00 |
| Hauswald Bakery/Div Of Schmidt'S | 5 | 20 | 90,760.00 |
| Life Like Products - Chesapeake Ave. | 6 | 16 | 98,884.00 |
| Rock-Tenn Box - Broening Highway | 6 | 14 | 30,372.00 |
| Stratus Petroleum | 6 | 12 | 30,295.00 |
| P Q Corporation | 6 | 12 | 385,554.43 |
| Mail-Well Label | 3 | 12 | 22,620.00 |
| Dext Company | 6 | 11 | 39,820.00 |
| Cpsg Westport | 5 | 10 | 17,400.00 |
| H & S Bakery | 5 | 10 | 143,860.00 |
| Mercy Medical Center | 9 | 9 | 7,716.16 |
| University Of Maryland At Baltimore, Environmental Health And Safety Facility | 9 | 9 | 2,030.37 |
| Johns Hopkins University School Of Medicine | 9 | 9 | 1,232.83 |
| Stericycle, Inc. (Formerly Medx, Inc. And Bfi Medical Waste, Inc.) | 9 | 9 | 14,802.52 |
| Franklin Square Hospital Center | 9 | 9 | 10,926.42 |
| Rhodia Inc. | 4 | 8 | 2,086.00 |
| Fleischmann'S Vinegar | 2 | 8 | 87,620.00 |
| Erachem Comilog Inc. Baltimore Plant | 3 | 6 | 13,103.16 |
| Safety-Kleen Sys. (201601) | 2 | 4 | 7.11 |
| Itw Food Equipment Group L.L.C.Vulcan-Hart Div. | 3 | 3 | 49.66 |
| Atotech Usa Inc. | 2 | 3 | 399.00 |
| Fox Inds. Inc. | 2 | 3 | 2,342.00 |
| Insl-X Prods. Corp. | 2 | 2 | 3,363.00 |
| Delta Chemical Corp. | 2 | 2 | 49.00 |
| Millennium Specialty Chemicals | 2 | 2 | 8.60 |
| Lebanon Chemical Corp. | 1 | 2 | 712.00 |
| Tilley Chemical Co. Inc. | 1 | 2 | 500.00 |
| Rockland Bleach & Dye Works | 1 | 2 | 6,228.00 |
| Baltimore Quality Assurance | 1 | 1 | 360.00 |
| Baltimore Galvanizing Co. Inc. | 1 | 1 | 250.00 |
| Southern Galvanizing Co. | 1 | 1 | 1,561.00 |
