| 3m (Minnesota Mining & Mfg. Co.) - Knoxville | 14 | 1722 | 1,946,083.12 |
| A-1 Fiberglass - Rinehart Manufacturing | 15 | 83 | 47,762.58 |
| A. I. Processors | 1 | 2 | 36.00 |
| A.Y. Mcdonald Mfg. Co. | 2 | 4 | 423.00 |
| A.Y.M. Inc. | 1 | 1 | 827.00 |
| Aco Yp Inc. | 1 | 1 | 7,637.00 |
| Adair County Sanitary Landfill | 28 | 28 | 506.65 |
| Adams / Taylor County Sanitary Landfill | 28 | 28 | 1,086.71 |
| Adm - Des Moines Soybean | 58 | 495 | 2,582,963.13 |
| Adm Animal Health | 1 | 1 | 5.00 |
| Adm Corn Processing | 11 | 11 | 236,820.00 |
| Adm Corn Processing - Cedar Rapids | 57 | 3720 | 50,356,119.46 |
| Adm Corn Processing - Clinton | 56 | 3146 | 23,882,886.77 |
| Adm Power Plant | 4 | 4 | 13.00 |
| Advanced Component Technologies | 12 | 278 | 122,943.70 |
| Advanced Heat Treat Corp. | 1 | 1 | 9,584.00 |
| Ag Processing Inc A Cooperative - Manning | 9 | 226 | 849,179.61 |
| Ag Processing, Inc. - Eagle Grove | 9 | 300 | 3,328,042.85 |
| Ag Processing, Inc. - Emmetsburg | 8 | 214 | 628,943.08 |
| Ag Processing, Inc. - Mason City | 8 | 253 | 887,900.02 |
| Ag Processing, Inc. - Sergeant Bluff | 8 | 20 | 424,074.69 |
| Ag Processing, Inc. - Sheldon | 8 | 277 | 1,187,619.50 |
| Ajinomoto Food Ingredients L.L.C. | 1 | 2 | 7,413.07 |
| Ajinomoto Heartland Llc. | 10 | 50 | 593,103.00 |
| Alcoa Inc. | 33 | 3071 | 3,427,190.50 |
| Alliance Pipeline L.P. - Manchester | 9 | 16 | 216,352.20 |
| Allsteel Muscatine Components Plant | 27 | 326 | 180,372.72 |
| Amana Refrigeration Products - Maytag Appliances | 37 | 1821 | 374,181.41 |
| American Coals Landfill | 28 | 28 | 1,069.83 |
| American Color Graphics | 1 | 2 | 3,291.00 |
| American Packaging Corporation | 7 | 250 | 167,366.00 |
| American Welding & Tank Company | 17 | 79 | 189,085.92 |
| Anamosa State Penitentiary | 23 | 367 | 71,755.08 |
| Anr Pipeline Co. - Birmingham Compressor | 7 | 90 | 1,914,868.09 |
| Anr Pipeline Co. - Lineville Compressor | 9 | 135 | 1,330,600.57 |
| Appanoose County Sanitary Landfill | 28 | 28 | 1,341.07 |
| Arch Mirror North | 7 | 19 | 29,830.00 |
| Archer Daniels Midland - Keokuk | 8 | 383 | 867,107.40 |
| Arrow Acme Inc. | 1 | 1 | 7.83 |
| Art'S-Way Mfg. Co. I Nc. | 1 | 1 | 11,554.00 |
| Audubon County Sanitary Landfill | 28 | 28 | 691.72 |
| Aveka Mfg. | 2 | 4 | 9,509.00 |
| Barker Co. | 1 | 1 | 250.00 |
| Barker Co. | 3 | 3 | 750.00 |
| Barton Solvents Inc. Bettendorf Branch | 17 | 31 | 4,448.00 |
| Barton Solvents Inc. Council | 17 | 31 | 4,395.00 |
| Barton Solvents Inc. Des Moin | 14 | 26 | 2,548.00 |
| Beef Prods. Inc. | 1 | 2 | 18,250.00 |
| Benco Mfg. | 3 | 3 | 180.50 |
| Benton County Sanitary Landfill | 28 | 28 | 1,296.65 |
| Bertch Cabinet Mfg., Inc. - Legacy Division | 17 | 253 | 1,023,786.39 |
| Bertch Cabinet Mfg., Inc. - Oelwein | 13 | 118 | 205,532.00 |
| Bertch Cabinet Mfg., Inc. - Waterloo/Oasis Facility | 20 | 332 | 1,095,446.26 |
| Bfc Electric Company, Llc | 9 | 58 | 1,705,600.00 |
| Bituma Corp. | 1 | 2 | 33,067.00 |
| Bituminous Materials & Supply L.P. | 1 | 2 | 0.16 |
| Black Hawk County Sanitary Landfill | 39 | 138 | 28,197.46 |
| Blackhawk Foundry & Machine | 21 | 169 | 576,731.66 |
| Bloomfield Foundry, Inc. | 9 | 242 | 393,210.89 |
| Blue Bird Midwest | 22 | 229 | 349,901.85 |
| Bluestem Landfill #1 / Cedar Rapids | 28 | 28 | 4,014.48 |
| Bluestem Landfill #2 / Marion | 28 | 28 | 1,317.02 |
| Bluestem Solid Waste Agency Sanitary Landfill #1 | 43 | 121 | 645,797.05 |
| Boc Gases | 1 | 2 | 25,677.00 |
| Boone County Sanitary Landfill | 28 | 28 | 5,251.63 |
| Bowie Mfg. Inc. | 1 | 2 | 8,391.00 |
| Box Usa Mfg. Of Iowa | 1 | 1 | 7.00 |
| Bp - Bettendorf Terminal | 5 | 65 | 305,860.00 |
| Bp - Cedar Rapids Terminal | 14 | 91 | 206,149.98 |
| Bp - Des Moines Terminal | 5 | 85 | 337,720.00 |
| Bpb Fort Dodge Plant | 8 | 775 | 1,179,836.05 |
| Brand Fx Body Company - Swea City | 19 | 202 | 290,124.50 |
| Brenntag Great Lakes L.L.C. Iowa Facility | 2 | 4 | 3,063.00 |
| Buena Vista County Landfill & Mrf | 28 | 28 | 446.06 |
| Bunge North America, Inc. - Bunge Avenue | 9 | 273 | 1,734,505.28 |
| Calhoun County Sanitary Landfill | 28 | 28 | 434.69 |
| Cambrex Charles City, Inc. | 16 | 330 | 236,831.63 |
| Carfrae Meat Co. Inc. | 1 | 1 | 300.00 |
| Cargill Corn Milling | 6 | 7 | 359,778.00 |
| Cargill Inc. | 1 | 2 | 48,138.00 |
| Cargill, Inc. - Cedar Rapids | 44 | 270 | 2,066,868.08 |
| Cargill, Inc. - Des Moines | 8 | 221 | 1,989,854.62 |
| Cargill, Inc. - Eddyville | 7 | 538 | 26,617,349.75 |
| Cargill, Inc. - Iowa Falls | 8 | 225 | 495,321.39 |
| Cargill, Inc. - Sioux City | 7 | 283 | 1,374,173.74 |
| Cargill, Inc. - Soybean East Plant | 7 | 153 | 866,946.04 |
| Carroll County Swm Commission / Landfill & Mrf | 28 | 28 | 962.03 |
| Carry-On Trailer Corp. | 1 | 1 | 21,500.00 |
| Case Corporation | 20 | 351 | 207,682.12 |
| Ceco Building Systems | 11 | 244 | 758,252.99 |
| Cedar Falls Municipal Electric Utility/Cts | 80 | 427 | 3,106,108.54 |
| Cedar Rapids Wpcf | 18 | 94 | 165,760.00 |
| Cedarapids, Inc. | 14 | 204 | 70,614.25 |
| Central Disposal Systems, Inc. | 34 | 45 | 568,242.40 |
| Central Iowa Power Coop. - Fair Station | 78 | 179 | 12,701,740.50 |
| Central Iowa Power Coop. - Summit Lake | 6 | 95 | 271,541.46 |
| Cf Processing, Llc | 8 | 84 | 754,845.38 |
| Cherokee County Sanitary Landfill | 28 | 28 | 4,170.74 |
| Chicago Bridge & Iron Co. | 11 | 21 | 196,431.05 |
| Chickasaw County Sanitary Landfill | 28 | 28 | 297.54 |
| City Of Ames Sanitary Landfill | 28 | 28 | 714.09 |
| City Of Ames Steam Electric Plant/Combustion Turbine | 83 | 310 | 5,683,607.15 |
| City Of Hawarden Sanitary Landfill (C&D) | 28 | 28 | 7,786.76 |
| City Of Muscatine Landfill & Recycling Center | 28 | 28 | 10,047.08 |
| City Of Newton Sanitary Landfill | 28 | 28 | 4,062.44 |
| Climax Molybdenum Company | 10 | 552 | 2,576,659.90 |
| Clinton County Sanitary Landfill (East) | 28 | 28 | 6,500.05 |
| Clow Valve Co. Fndy. | 4 | 8 | 192.02 |
| Color Converting Industries | 8 | 181 | 330,752.40 |
| Commander Buildings Inc. | 1 | 1 | 452.00 |
| Conagra Frozen Foods Council Bluffs | 1 | 1 | 9,125.00 |
| Construction Products, Inc. | 10 | 61 | 143,980.00 |
| Cornbelt Power - Wisdom Generating Station | 77 | 213 | 1,839,934.77 |
| Council Bluffs | 83 | 331 | 79,049,128.81 |
| Cr-1, L.P. - Dba Cargill Nutriproducts | 9 | 41 | 96,989.00 |
| Crane Valve | 13 | 225 | 273,786.96 |
| Crawford County Sanitary Landfill | 28 | 28 | 616.48 |
| Cryovac Inc., Sealed Air Corporation | 7 | 259 | 508,909.54 |
| Curries Division Of Aadg, Inc. - 12th Street | 12 | 140 | 210,648.43 |
| Curries Division Of Aadg, Inc. - 9th Street | 14 | 302 | 350,320.00 |
| Curwood, Inc. | 10 | 413 | 268,970.25 |
| Decorah Ops. Textron Fastening Sys. | 3 | 3 | 15.00 |
| Delaware County Sanitary Landfill | 28 | 28 | 1,010.55 |
| Des Moines County Regional Solid Waste Commission | 28 | 28 | 9,691.82 |
| Dethmers Manufacturing Co. | 9 | 49 | 50,800.00 |
| Dial Corp. | 1 | 2 | 1,000.00 |
| Diamond Prods. Co. | 1 | 1 | 4,065.00 |
| Diamond V Mills, Inc | 9 | 226 | 424,072.01 |
| Diamond Vogel Paint Co. Inc. | 6 | 6 | 17,088.00 |
| Dickinson Landfill | 34 | 49 | 202,541.49 |
| Diosynth Inc. | 1 | 2 | 38,520.00 |
| Dodgen Industries, Inc. | 15 | 35 | 8,137.75 |
| Donaldson Company, Inc. - Cresco | 18 | 266 | 201,156.63 |
| Donaldson Company, Inc. - Grinnell | 5 | 5 | 0.00 |
| Dubuque Metropolitan Sanitary Landfill | 28 | 28 | 10,561.65 |
| Dubuque Water Pollution Control Plant | 7 | 1379 | 250,260.00 |
| Dupont Performance Coatings | 22 | 3364 | 261,544.03 |
| Dura Automotive Systems | 10 | 56 | 9,714.82 |
| Dynamic Fiberglass, Inc. | 16 | 104 | 101,386.80 |
| Eagel Window & Door Inc. | 1 | 1 | 29,824.00 |
| Eagle Ottawa Waterloo | 2 | 2 | 4,293.00 |
| Eagle Window & Door, Inc. | 13 | 304 | 654,457.08 |
| Eaton Corp. | 4 | 7 | 2,005.00 |
| Electrimold | 6 | 22 | 74,650.00 |
| Electrolux Home Products | 13 | 238 | 1,230,780.00 |
| Elkem Carbon - Keokuk | 17 | 1183 | 630,819.52 |
| Emco Enterprises Inc. | 5 | 5 | 95,280.00 |
| Enterprise Ngl Pipeline, Llc. - Iowa City Terminal | 12 | 122 | 221,883.19 |
| Equistar Chemicals, L.P. | 21 | 5157 | 18,236,206.94 |
| Evergreen Packaging Equipment | 2 | 4 | 1,000.00 |
| Excel Corp. | 1 | 1 | 10,000.00 |
| Exide Techs. | 2 | 3 | 2,958.00 |
| Fansteel Wellman Dynamics | 17 | 532 | 305,449.27 |
| Farmland Foods Inc. | 1 | 1 | 38,000.00 |
| Fayette County Slf & Recycling | 28 | 28 | 2,858.47 |
| Featherlite Manufacturing, Inc. - Cresco | 18 | 124 | 86,430.58 |
| Featherlite, Inc. - Shenandoah Operations | 14 | 67 | 90,940.34 |
| Federal Mogul Ignition Prods. Champion Spark Plug Co. | 1 | 2 | 500.00 |
| Firestone Ag Tire Company | 44 | 688 | 1,373,207.07 |
| Fisher Controls Intl. Inc. | 2 | 4 | 510.00 |
| Flannegan Sanitary Landfill | 28 | 28 | 2,249.19 |
| Fleetguard, Inc. | 9 | 288 | 268,847.20 |
| Flint Hills Resources, L.P. - Bettendorf Terminal | 12 | 164 | 544,940.00 |
| Floyd / Mitchell County Sanitary Landfill | 28 | 28 | 3,547.40 |
| Franklin County Sanitary Landfill | 28 | 28 | 2,595.59 |
| Friesen Of Iowa | 14 | 208 | 92,586.40 |
| Ge Co. | 2 | 2 | 11,279.03 |
| Gelita Usa Inc. | 2 | 3 | 2,205.82 |
| Gemini -Decorah | 1 | 1 | 878.00 |
| Genencor Intl. Inc. | 1 | 2 | 5,835.00 |
| Generac Power Systems, Inc. | 16 | 58 | 32,487.79 |
| General Mills Operations, Inc. | 18 | 1900 | 2,187,344.79 |
| Georgia Pacific - Fort Dodge | 11 | 701 | 709,627.17 |
| Gkn Armstrong Wheels, Inc. - Armstrong | 19 | 504 | 322,029.48 |
| Gkn Armstrong Wheels, Inc. - Estherville | 15 | 208 | 112,826.84 |
| Glacier Daido America, Llc | 13 | 348 | 82,894.92 |
| Glen-Gery Corporation | 18 | 72 | 406,856.93 |
| Gomaco Corp. - Plant 2 | 3 | 6 | 17,021.00 |
| Gomaco Corporation | 20 | 320 | 105,325.56 |
| Goodyear Tire & Rubber Co. | 1 | 1 | 0.00 |
| Grain Processing Corporation | 21 | 1955 | 34,908,841.26 |
| Green Valley Chemical Corporation | 20 | 223 | 2,722,034.73 |
| Gregory Manufacturing Co., Inc. | 13 | 85 | 111,424.60 |
| Griffin Pipe Products Company | 14 | 224 | 1,007,022.07 |
| Griffin Wheel Company | 16 | 265 | 1,402,724.06 |
| Groschopp | 12 | 191 | 119,045.43 |
| Grundy County Sanitary Landfill | 28 | 28 | 923.28 |
| Guardian Industries Corporation | 6 | 57 | 2,555,354.78 |
| Gustafson L.L.C. | 2 | 3 | 12.00 |
| H.J. Heinz, L.P. | 28 | 669 | 196,212.91 |
| Hach Co. | 1 | 2 | 1,000.00 |
| Harrison County Sanitary Landfill & Ts | 28 | 28 | 435.89 |
| Harsco Corp. Heckett Multiserv Plant 52 | 4 | 4 | 4,967.00 |
| Hearth & Home Techs. Inc. | 6 | 6 | 41,548.00 |
| Heartland Eps, Inc. | 5 | 5 | 140,000.00 |
| Helena Chemical Co. | 3 | 6 | 1,290.00 |
| Henry County Sanitary Landfill | 28 | 28 | 3,445.92 |
| Hirsch Industries, Inc. | 12 | 95 | 121,179.05 |
| Holcim (Us) Inc. - Mason City | 20 | 38 | 6,466,443.63 |
| Humbolt County Sanitary Landfill | 28 | 28 | 763.23 |
| Hydrite Chemical Co. | 1 | 2 | 970.00 |
| Ibp Inc. | 1 | 1 | 9,000.00 |
| Ibp Inc. | 1 | 2 | 36,000.00 |
| Ibp Inc. | 2 | 3 | 760.00 |
| Ibp Inc. | 2 | 3 | 25,105.00 |
| Ida County Sanitary Landfill | 28 | 28 | 420.61 |
| Industrial Laminates/Norplex, Inc. | 13 | 707 | 4,479,677.46 |
| Intier Automotive Seating Of America Romech A Div. | 1 | 2 | 20.00 |
| Iowa Army Ammunition Plant | 48 | 2024 | 2,566,742.88 |
| Iowa Army Ammunition Plant Slf | 28 | 28 | 198.56 |
| Iowa City Sanitary Landfill | 42 | 76 | 80,960.54 |
| Iowa Contract Fabricators Inc. | 1 | 1 | 82.00 |
| Iowa County Sanitary Landfill | 28 | 28 | 12,057.69 |
| Iowa E.P.S. Products, Inc. - Des Moines | 10 | 56 | 247,002.86 |
| Iowa Methodist Medical Center | 17 | 190 | 49,807.04 |
| Iowa Mold Tooling Co. Inc. | 3 | 3 | 213.00 |
| Iowa Packing Co. | 1 | 2 | 3,750.00 |
| Iowa Paint Tech. & Manufacturing Center | 16 | 459 | 43,094.55 |
| Iowa State University/ Isu Heating Plant | 40 | 846 | 7,797,128.38 |
| Ipl - Burlington Agency Street Combustion Turbines | 8 | 93 | 46,662.09 |
| Ipl - Burlington Generating Station | 82 | 341 | 16,157,316.65 |
| Ipl - Centerville Combustion Turbines And Diesels | 23 | 117 | 25,695.02 |
| Ipl - Dubuque Generating Station | 85 | 403 | 8,898,563.46 |
| Ipl - Grinnell Combustion Turbines Station | 10 | 39 | 1,869.47 |
| Ipl - Lansing Generating Station | 86 | 495 | 19,998,402.55 |
| Ipl - Lime Creek Combustion Turbines Station | 10 | 34 | 81,410.04 |
| Ipl - M.L. Kapp Generating Station | 90 | 201 | 15,026,105.06 |
| Ipl - Ottumwa Generating Station | 84 | 274 | 63,696,354.54 |
| Ipl - Prairie Creek Generating Station | 89 | 461 | 16,706,029.78 |
| Ipl - Sixth Street Generating Station | 84 | 553 | 9,723,801.88 |
| Ipl - Sutherland Generating Station | 85 | 818 | 17,686,575.26 |
| Ipsco Steel, Inc. | 16 | 249 | 2,649,458.10 |
| Ipsco Tubulars Inc. | 3 | 4 | 1,005.01 |
| Itwc | 0 | 0 | 0.00 |
| Jeld-Wen, Inc.,Dba Jeld-Wen - Dubuque | 5 | 240 | 659,382.15 |
| John Deere - Davenport Works | 39 | 540 | 181,631.11 |
| John Deere - Des Moines Works | 19 | 1043 | 290,389.81 |
| John Deere - Dubuque Works | 42 | 1383 | 3,082,955.61 |
| John Deere - Ottumwa Works | 27 | 215 | 585,780.57 |
| John Deere - Waterloo Works | 38 | 607 | 254,041.32 |
| John Deere Engine Works | 1 | 1 | 19,848.00 |
| John Deere Foundry - Waterloo | 19 | 1026 | 1,119,597.38 |
| John Deere Product Engineering Center | 15 | 1064 | 1,140,744.46 |
| John Deere Waterloo Works - Donald Street Site | 31 | 683 | 1,098,576.72 |
| John Morrell & Co. | 1 | 2 | 31,039.00 |
| Johnson Mfg. Co. | 1 | 2 | 0.21 |
| Jones County Sanitary Landfill | 28 | 28 | 796.33 |
| K.A. Steel Chemicals Inc. | 1 | 1 | 6.00 |
| Kaneb Pipe Line Op. Partnership Lp - Le Mars | 5 | 75 | 138,264.00 |
| Kaneb Pipe Line Op. Partnership Lp - Milford | 5 | 85 | 345,188.00 |
| Kaneb Pipe Line Op. Partnership Lp - Rock Rapids | 5 | 65 | 128,740.00 |
| Kay Dee Feed Co. Inc. | 2 | 4 | 20.00 |
| Kemin Inds. Inc. | 1 | 2 | 10.00 |
| Keokuk Steel Casting, Inc. - Hawkeye Facility | 19 | 320 | 835,084.94 |
| Kiefer Built, Inc. | 13 | 36 | 43,139.15 |
| Klinger Paint Co. Inc. | 4 | 8 | 14,105.00 |
| Koch Materials Co. - Dubuque Asphalt Terminal | 7 | 218 | 24,335.06 |
| Koch Nitrogen Company - Fort Dodge | 9 | 144 | 1,100,865.83 |
| Koehring Cranes, Inc. | 14 | 64 | 48,668.19 |
| Kossuth County Sanitary Landfill | 28 | 28 | 2,936.94 |
| Kraft Foods, Inc. - Davenport | 16 | 137 | 1,488,822.10 |
| Lafarge North America Inc. | 39 | 623 | 16,953,149.79 |
| Lakes Regional Healthcare | 11 | 11 | 386.04 |
| Land O Lakes Farmland Feed | 1 | 1 | 5,004.00 |
| Landfill Of North Iowa | 28 | 28 | 8,381.28 |
| Lear Corporation | 20 | 869 | 865,296.00 |
| Lee County Sanitary Landfill & Mrf/Great River Swa | 28 | 28 | 2,318.41 |
| Lehigh Cement Company - Mason City | 32 | 528 | 23,782,327.43 |
| Leiner-Davis Gelatin | 1 | 1 | 127.60 |
| Lennox Manufacturing, Inc. | 13 | 291 | 290,570.14 |
| Lewisbins+Division Orbis Corp. | 1 | 1 | 1,718.00 |
| Linwood Mining & Mineral Corporation | 7 | 424 | 1,314,939.85 |
| Loparex, Inc. | 11 | 363 | 991,868.57 |
| Louisa | 81 | 116 | 58,843,598.90 |
| Louisa County Sanitary Landfill | 28 | 28 | 3,091.49 |
| Lucas / Monroe County Sanitary Landfill | 28 | 28 | 1,434.75 |
| Maax Midwest - Cedar Mfg. | 1 | 2 | 111,850.00 |
| Magellan Pipeline Co., Llc. - Des Moines | 12 | 548 | 284,743.05 |
| Magellan Pipeline Co., Llc. - Dubuque | 11 | 70 | 499,559.64 |
| Magellan Pipeline Co., Llc. - Fort Dodge | 11 | 72 | 127,992.00 |
| Magellan Pipeline Co., Llc. - Iowa City | 12 | 272 | 149,918.63 |
| Magellan Pipeline Co., Llc. - Mason City | 11 | 215 | 84,458.36 |
| Magellan Pipeline Co., Llc. - Milford | 11 | 107 | 795,398.00 |
| Magellan Pipeline Co., Llc. - Sioux City | 14 | 360 | 200,872.00 |
| Magellan Pipeline Co., Llc. - Waterloo | 12 | 115 | 644,173.40 |
| Mahaska County Sanitary Landfill | 28 | 28 | 4,774.61 |
| Maintaineer Corp. Of Iowa | 1 | 1 | 5.00 |
| Manildra Energy Corporation | 8 | 204 | 260,658.05 |
| Maquoketa Municipal Utilities - 105 Generac Dr. | 5 | 25 | 3,661.74 |
| Marion County / South Central Iowa Solid Waste | 28 | 28 | 5,120.11 |
| Marshall County Sanitary Landfill | 28 | 28 | 4,811.22 |
| Maytag - Newton Laundry Products - Plant 2 | 32 | 1520 | 7,737,797.20 |
| Maytag Newton Laundry Prods. Pl1 | 1 | 2 | 51.00 |
| Mckee Button Company | 8 | 53 | 15,618.80 |
| Metokote Corporation - Plant 15 | 9 | 72 | 103,507.46 |
| Metokote Corporation - Plant 24 | 6 | 13 | 55,536.17 |
| Metro Methane Recovery Facility | 7 | 71 | 602,400.00 |
| Metro Park East Sanitary Landfill | 34 | 62 | 224,242.76 |
| Metso Minerals Industries, Inc. | 8 | 65 | 37,559.20 |
| Metzeler Automotive Profile Systems | 19 | 1341 | 443,051.64 |
| Michael Foods | 1 | 1 | 200.00 |
| Midamerican Energy Co. - Coralville Turbines | 6 | 46 | 1,820.00 |
| Midamerican Energy Co. - Council Bluffs Energy Ctr | 56 | 390 | 74,005,088.42 |
| Midamerican Energy Co. - Electrifarm Turbines | 13 | 77 | 185,380.00 |
| Midamerican Energy Co. - George Neal North | 91 | 607 | 91,303,170.92 |
| Midamerican Energy Co. - George Neal South | 88 | 315 | 53,172,770.44 |
| Midamerican Energy Co. - Louisa Station | 56 | 319 | 53,409,159.78 |
| Midamerican Energy Co. - Merl Parr Turbines | 5 | 25 | 3,900.00 |
| Midamerican Energy Co. - Pleasant Hill Turbines | 10 | 61 | 12,462.10 |
| Midamerican Energy Co. - River Hills Turbines | 7 | 105 | 18,755.30 |
| Midamerican Energy Co. - Riverside Station | 87 | 778 | 9,828,148.66 |
| Midamerican Energy Co. - Shenandoah Power Station | 7 | 275 | 30,680.00 |
| Midamerican Energy Co. - Sycamore Turbines | 11 | 31 | 151,333.20 |
| Midamerican Energy Co. - Waterloo Lundquist Sta. | 12 | 260 | 26,484.05 |
| Midland Forge Div. | 2 | 2 | 16.58 |
| Missouri Valley Steel Co. | 1 | 1 | 250.00 |
| Modern Welding Co. Of Iowa Inc. | 3 | 3 | 9,263.00 |
| Modernfold, Inc. | 17 | 458 | 150,813.56 |
| Modine Mfg. Co. | 3 | 3 | 26.10 |
| Monsanto Company - Muscatine 3670/6908/6909 | 53 | 1398 | 1,896,006.77 |
| Montgomery County Sanitary Landfill | 28 | 28 | 1,230.71 |
| Morrison Brothers Co. | 1 | 1 | 11.00 |
| Muscatine Power & Water | 93 | 1388 | 19,103,543.39 |
| National By-Products Inc. | 1 | 2 | 1,386.00 |
| National By-Products Inc. | 1 | 2 | 2,016.00 |
| National Cooperative Refinery Association | 12 | 237 | 149,330.00 |
| Natural Gas Pipeline Co. Of America - Station 107 | 10 | 104 | 3,726,570.00 |
| Natural Gas Pipeline Co. Of America - Station 108 | 10 | 77 | 1,935,210.52 |
| Natural Gas Pipeline Co. Of America - Station 109 | 10 | 78 | 3,022,380.00 |
| Natural Gas Pipeline Co. Of America - Station 198 | 10 | 35 | 22,080.00 |
| Natural Gas Pipeline Co. Of America - Station 199 | 10 | 35 | 119,320.00 |
| Natural Gas Pipeline Co. Of America - Station 204 | 11 | 125 | 3,196,984.00 |
| Natural Gas Pipeline Co. Of America - Station 205 | 11 | 65 | 321,132.00 |
| New Ngc Inc. | 1 | 2 | 0.70 |
| Nichols Aluminum - Davenport | 19 | 405 | 1,325,000.94 |
| Nichols Aluminum Casting | 14 | 181 | 665,600.00 |
| North Central Iowa Regional Sanitary Landfill | 28 | 28 | 3,281.53 |
| North Dallas Sanitary Landfill | 28 | 28 | 2,409.71 |
| North Star Steel Company | 18 | 155 | 1,851,751.01 |
| Northern Natural Gas Co. - Garner Lng Plant | 18 | 149 | 414,282.23 |
| Northern Natural Gas Co. - Oakland Compressor | 19 | 345 | 1,854,987.63 |
| Northern Natural Gas Co. - Ogden Compressor | 18 | 267 | 4,516,317.39 |
| Northern Natural Gas Co. - Paullina Compressor | 9 | 66 | 7,101.43 |
| Northern Natural Gas Co. - Redfield Compressor | 19 | 391 | 657,379.83 |
| Northern Natural Gas Co. - Waterloo Compressor | 18 | 146 | 952,362.77 |
| Northland Prods. Co. | 1 | 2 | 10.00 |
| Northwest Iowa Area Solid Waste Agency | 28 | 28 | 5,430.84 |
| Nst Landfill Gas Of Iowa, Inc. | 5 | 5 | 0.00 |
| Nulex Inc. | 1 | 2 | 9,000.00 |
| Nutra-Flo Co. Floyd Facility | 1 | 2 | 7,200.00 |
| Omaha Standard, Inc. | 23 | 227 | 197,743.91 |
| Omega Cabinets, Ltd. | 31 | 452 | 1,100,788.92 |
| Omnium | 7 | 14 | 439.00 |
| Orba-Johnson Transshipment | 6 | 30 | 57,805.48 |
| Ottumwa / Wapello County Sanitary Landfill | 28 | 28 | 2,973.26 |
| Paul Mueller Co. | 3 | 6 | 1,500.00 |
| Paxton & Vierling Steel Co. | 1 | 1 | 5.00 |
| Pella Corporation - Carroll Division | 12 | 178 | 157,526.93 |
| Pella Corporation - Pella Division | 85 | 667 | 2,549,148.50 |
| Pella Corporation - Shenandoah | 10 | 66 | 202,494.70 |
| Pella Corporation - Sioux Center | 14 | 146 | 327,942.40 |
| Pella Corporation - Story City Division | 9 | 93 | 69,700.00 |
| Pella Municipal Power Plant | 2 | 2 | 724.00 |
| Pella Municipal Power Plant | 51 | 506 | 2,998,198.23 |
| Penford Products Co. | 11 | 97 | 1,305,462.00 |
| Plymouth Inert Lf | 28 | 28 | 1,936.21 |
| Pmx Industries, Inc. | 9 | 242 | 200,658.01 |
| Polaris Industries, Inc. | 18 | 464 | 290,525.45 |
| Praxair Inc. | 1 | 1 | 5,103.00 |
| Precision Idler Inc. | 3 | 3 | 22,452.00 |
| Precision Inc. | 3 | 3 | 258.00 |
| Precision Inc. Corning | 2 | 2 | 13.00 |
| Prince Agri Prods. Inc. | 2 | 2 | 250.05 |
| Principal Life Insurance Company | 5 | 165 | 12,077.54 |
| Procter & Gamble Hair Care L.L.C. | 2 | 4 | 20,067.00 |
| Quad City Drum Recycling Company | 12 | 17 | 55,800.00 |
| Quad/Greenfield, Llc | 6 | 592 | 42,873.80 |
| Quality Mat Co., Inc. | 10 | 50 | 416,640.00 |
| Quinn Machine & Foundry | 9 | 3008 | 444,370.47 |
| R. R. Donnelley Printing Co. L.P. | 1 | 2 | 60,264.00 |
| Regency Thermographers | 1 | 2 | 0.47 |
| Riley Industrial Painting | 13 | 508 | 68,348.00 |
| Riley Paint Co. | 4 | 8 | 5,250.00 |
| River Terminal Corp. | 1 | 2 | 1,000.00 |
| Rock Tenn Co. | 1 | 2 | 4,019.00 |
| Rockwell Collins Inc. | 1 | 1 | 1.66 |
| Rockwell Collins Inc. - C Avenue Facility | 1 | 1 | 14.00 |
| Rockwell Collins Inc. Coralville Ops. | 1 | 1 | 1.66 |
| Roquette America Inc. Keokukplant | 6 | 7 | 192,998.30 |
| Rosenboon Machine & Tool Inc. | 1 | 2 | 2,768.00 |
| Rural Iowa Landfill | 28 | 28 | 4,668.95 |
| Sac County Sanitary Landfill | 28 | 28 | 894.43 |
| Safety-Kleen Sys. (504701) | 1 | 1 | 7.00 |
| Safety-Kleen Sys. (505301) | 1 | 1 | 5.00 |
| Scott Area Sanitary Landfill | 29 | 58 | 272,219.07 |
| Scott County Sanitary Landfill | 28 | 28 | 5,363.42 |
| Scotts Co. Fort Madison Ia | 1 | 1 | 250.00 |
| Seabee | 8 | 306 | 32,675.10 |
| Sethness Prods. Co. | 1 | 2 | 2,160.00 |
| Sheaffer Manufacturing Co., Llc | 14 | 126 | 9,011.81 |
| Shelby County Sanitary Landfill | 28 | 28 | 356.51 |
| Silgan Containers Mfg. Corp. - Fort Dodge | 11 | 59 | 536,703.59 |
| Silgan Containers Mfg. Corp. - Fort Madison | 9 | 58 | 678,032.47 |
| Sioux City Brick & Tile Company | 24 | 45 | 420,690.32 |
| Sioux City Sanitary Landfill | 28 | 28 | 7,924.12 |
| Sivyer Steel | 16 | 830 | 797,880.38 |
| Smi Joist Company | 9 | 56 | 393,236.00 |
| Snap-On Tools Manufacturing Company | 16 | 447 | 92,798.12 |
| South Central Iowa Landfill | 28 | 28 | 3,254.69 |
| South Dallas County Sanitary Landfill | 28 | 28 | 3,621.70 |
| Southeast Multi-County Sanitary Landfill | 28 | 28 | 5,723.03 |
| Spartech Townsend | 1 | 1 | 1,300.00 |
| Spec Cast | 1 | 1 | 3.91 |
| Spencer Hospital | 11 | 11 | 1,748.49 |
| Square D Co. | 1 | 1 | 500.00 |
| St. Luke'S Regional Medical Center | 26 | 199 | 17,049.37 |
| Star Building Systems | 13 | 105 | 710,710.11 |
| Stellar Industries, Inc. | 18 | 220 | 54,789.97 |
| Sudenga Industries, Inc. | 17 | 259 | 107,514.70 |
| Swift & Co. | 1 | 2 | 22,908.00 |
| Tall Corn Ethanol L.L.C. | 7 | 8 | 10,705.00 |
| Tama County Sanitary Landfill | 28 | 28 | 1,633.22 |
| Tama Paperboard | 13 | 239 | 661,185.20 |
| Tasler, Inc. - Eps | 7 | 28 | 243,056.20 |
| Terra Nitrogen - Port Neal Complex | 8 | 95 | 8,136,469.77 |
| The Dexter Company | 18 | 898 | 2,609,435.08 |
| The Hon Company - Oak Steel Plant | 28 | 1602 | 1,290,165.40 |
| Titan Tire Corporation | 35 | 2092 | 695,415.49 |
| Traer Mfg. Inc. | 1 | 1 | 9.00 |
| Trajet Products, Inc. | 7 | 73 | 143,050.20 |
| Transco Railway Products, Inc. | 12 | 90 | 278,280.00 |
| Trimark Corp. | 1 | 1 | 0.22 |
| Tschiffgrie Excavation Inc | 28 | 28 | 4,997.63 |
| Tur-Pak Foods Inc. | 1 | 2 | 255.00 |
| Twin State Inc. | 1 | 2 | 14,955.00 |
| Twin State Inc. | 1 | 2 | 6,240.00 |
| Tyson Fresh Meats, Inc. - Waterloo | 7 | 284 | 154,705.73 |
| Tyson Retail Deli, Inc. | 8 | 161 | 222,910.64 |
| Union County Sanitary Landfill | 28 | 28 | 1,509.86 |
| Union Tank Car Co. - Muscatine | 26 | 474 | 958,652.80 |
| United Brick & Tile | 24 | 95 | 714,376.32 |
| United States Gypsum Co. - Fort Dodge | 14 | 885 | 959,923.98 |
| United States Gypsum Co. - Sperry | 9 | 254 | 979,572.25 |
| Universal Rundle Corporation | 9 | 63 | 343,760.00 |
| University Of Iowa Main Power Plant/Main Campus & Hospitals | 20 | 724 | 36,179.56 |
| University Of Northern Iowa - Power Plant/Main Campus | 29 | 777 | 1,896,834.81 |
| Unverferth Manufacturing Co., Inc. | 14 | 130 | 174,692.33 |
| Usda, National Animal Disease Center | 10 | 119 | 148,530.86 |
| Valmont Coatings Inc. (Dba Siouxland Galvanizing Corp.) | 1 | 1 | 29.00 |
| Van Buren County Sanitary Landfill | 28 | 28 | 207.65 |
| Van Diest Supply Co. | 6 | 6 | 1,816.00 |
| Vermeer Manufacturing Company | 25 | 2076 | 254,213.44 |
| Viking Alloys Fndy. | 2 | 2 | 63.00 |
| Viking Pump South Main Facility | 2 | 2 | 10.00 |
| Vogel Paint & Wax Co., Inc. - Albany Place Se. | 19 | 1249 | 291,745.29 |
| Voltmaster Co. Inc. | 1 | 2 | 15.87 |
| Wacker Biochem Corp. | 1 | 2 | 31,284.00 |
| Warren Distribution Inc. | 3 | 6 | 2,505.40 |
| Wayne-Ringgold-Decatur Co. Slf | 28 | 28 | 3,545.04 |
| Weber & Sons Button Co., Inc. | 7 | 71 | 5,682.60 |
| Webster City Diesel Turbine | 6 | 6 | 3,504.07 |
| Wellborn Inds. Ltd. | 1 | 1 | 0.10 |
| Wells' Dairy Eng. Cente R | 3 | 3 | 750.00 |
| Wells' Dairy North Ice Cream Plant | 1 | 1 | 250.00 |
| Williamsburg Mfg. | 2 | 3 | 382.68 |
| Wilson Trailer Company | 13 | 68 | 61,487.60 |
| Winegard Company | 16 | 147 | 98,772.67 |
| Winnebago Inds. Inc. | 2 | 4 | 32,886.00 |
| Winnebago Industries, Inc. - Forest City | 25 | 713 | 773,778.63 |
| Winnebago Industries, Inc. - Hampton | 19 | 238 | 223,959.60 |
| Winneshiek County Sanitary Landfill | 28 | 28 | 4,584.52 |
| Woodbury County Sanitary Landfill | 28 | 28 | 662.19 |
| Woodharbor Molding And Millworks, Inc. | 16 | 286 | 237,748.00 |
| Woodmarc, L.C. | 14 | 298 | 362,843.60 |
| Wright County Sanitary Landfill | 28 | 28 | 908.46 |
| Xerxes Corporation | 6 | 65 | 118,584.00 |
| Zinpro Corp. | 4 | 4 | 812.40 |
