| Albemarle Alkyls Unit | 25 | 1371 | 930,599.00 |
| Pasadena Plant | 27 | 1176 | 1,248,244.01 |
| Clear Lake Plant | 62 | 1045 | 8,500,887.99 |
| Houston Chemical Complex | 11 | 1038 | 2,063,682.20 |
| Industrial Wastewater Department | 50 | 1010 | 488,638.20 |
| Petrolite Corporation | 26 | 830 | 339,259.40 |
| Lyondell Chemical Bayport | 13 | 777 | 775,872.21 |
| Pasadena Plant | 25 | 621 | 6,973,684.20 |
| Bayport Plant | 22 | 567 | 622,403.80 |
| Roger W. Powell Plant | 14 | 467 | 35,494.60 |
| Kuraray America Inc | 7 | 426 | 347,430.40 |
| Ditntrotoluene Plant | 15 | 414 | 1,210,047.23 |
| Pasadena Terminal | 16 | 397 | 387,406.47 |
| Pasadena Plant | 30 | 393 | 5,616,507.23 |
| Bayport Hdpe Plant | 11 | 393 | 694,305.40 |
| Paper Company | 19 | 389 | 622,758.40 |
| Bayport Facility | 40 | 363 | 284,104.40 |
| Lonza Incorporated | 14 | 305 | 226,422.00 |
| Pasadena Pvc Plant | 11 | 285 | 1,251,805.98 |
| Styrene Modernization Pr | 19 | 277 | 950,885.80 |
| Haldor Topsoe, Inc. | 12 | 237 | 327,721.20 |
| Basell U.S.A., Inc. | 5 | 211 | 456,701.79 |
| Clear Lake Gas Plant | 11 | 199 | 937,074.80 |
| Pasadena Pulp Mill | 3 | 188 | 22,803.00 |
| Clear Lake Manufacturing | 27 | 186 | 36,046.00 |
| Pasadena Station | 12 | 177 | 160,099.20 |
| Agrifos L L C | 10 | 171 | 1,101,985.01 |
| Kaneka Texas Corporation | 14 | 148 | 454,696.60 |
| Pasadena Terminal | 10 | 148 | 78,808.00 |
| Memc Pasadena Inc | 11 | 140 | 108,837.80 |
| Marathon Ashland Pipe Ln | 13 | 136 | 214,963.60 |
| Pasadena Plant | 16 | 129 | 701,002.60 |
| Goodyear Tire And Rubber | 12 | 121 | 101,076.77 |
| Jefferson St Truck Rack T | 11 | 118 | 147,071.60 |
| F.M.C. Corporation | 23 | 110 | 75,944.59 |
| Bayport Plant | 11 | 84 | 332,815.00 |
| Bayport Site | 9 | 76 | 48,721.00 |
| Oil Tanking Pasadena | 7 | 66 | 91,823.80 |
| Pasadena Cogeneration | 12 | 58 | 1,647,907.98 |
| Texas Pan Service Inc | 7 | 55 | 129,718.80 |
| Air Liquide Bayport Compl | 7 | 51 | 4,725,674.57 |
| Deepwater Station | 38 | 44 | 85,389.79 |
| Solvents Plant | 11 | 38 | 72,875.80 |
| Ethyl Corp. | 16 | 32 | 5,703.00 |
| Bayport Plant | 6 | 28 | 344,641.61 |
| Newpark Shipbuilding-Pasadena | 15 | 21 | 38,505.15 |
| Colex Terminal | 2 | 18 | 80,050.40 |
| Georgia Gulf Corp., Pasadena Plant Ship Dock Wharf | 12 | 16 | 38,956.08 |
| Quest Separation Techs. Inc. | 8 | 14 | 1,136.00 |
| Hoyer Terminal Services | 5 | 11 | 38,644.00 |
| Clear Lake Meter Site 1 | 2 | 10 | 24,536.00 |
| Bp Amoco Chemical Co. | 5 | 7 | 9,456.00 |
| Equistar Chemicals L.P. Bayport Polymers | 4 | 7 | 2,250.00 |
| Coastal Chemical Co. L.L.C. | 3 | 6 | 940.00 |
| Septon Co. Of America | 3 | 6 | 1,582.00 |
| Chemcomm Inc. | 3 | 6 | 4,500.00 |
| Nova Molecular Techs. Inc. | 3 | 6 | 1,500.00 |
| Sunoco Inc. (R&M) | 3 | 5 | 4,476.00 |
| American Acryl L.P. | 3 | 5 | 19,512.00 |
| Dianal America Inc. | 2 | 4 | 2,199.00 |
| Phyto-Source L.P. | 2 | 4 | 1,015.00 |
| Nissan Chemical Houston Corp. | 2 | 3 | 989.00 |
| Huish Detergents Texas | 1 | 2 | 530.00 |
| Can Holdings Inc. Ticona Gur Bayport Plant | 1 | 2 | 7,850.00 |
| Macdermid Inc. | 1 | 2 | 500.00 |
| Tessenderlo Kerley Inc. | 1 | 2 | 1,215.00 |
| Lamson & Sessions | 1 | 1 | 0.05 |
| Atofina Chemicals Inc. | 1 | 1 | 250.00 |
