| TPY | facn | facility | location |
| 1) | 1176.3 | 1409010006 | AK STEEL CORPORATION | MIDDLETOWN |
| 2) | 893.4 | 0701000007 | DP&L, J.M. STUART GENERATING STATION | ABERDEEN |
| 3) | 647.8 | 1431350093 | CINERGY CORP MIAMI FORT STATION | NORTH BEND |
| 4) | 534.2 | 0320010001 | GMC POWERTRAIN DIV. | DEFIANCE |
| 5) | 529.4 | 1413100008 | CINERGY CG&E WC BECKJORD STATION | NEW RICHMOND |
| 6) | 527.7 | 0145020185 | OWENS CORNING | NEWARK |
| 7) | 468.3 | 0627000003 | OHIO VALLEY ELECTRIC CORP., KYGER CREEK STATION | CHESHIRE |
| 8) | 419.4 | 0278000463 | WCI STEEL, INC. | HOWLAND/WEATHERSFIELD/WARREN |
| 9) | 323.0 | 0641090010 | WHEELING-PITTSBURGH STEEL CORPORATION - STEUBENVILLE | STEUBENVILLE |
| 10) | 315.3 | 0684020006 | ERAMET MARIETTA, INC. | MARIETTA |
| 11) | 311.8 | 0302020012 | PREMCOR REFINING GROUP | LIMA |
| 12) | 311.1 | 0616000000 | CONESVILLE POWER PLANT | CONESVILLE |
| 13) | 280.8 | 1318120180 | FORD MOTOR COMPANY, CLEVELAND CASTING PLANT | BROOK PARK |
| 14) | 273.1 | 0684000000 | MUSKINGUM RIVER POWER PLANT | WATERFORD |
| 15) | 260.9 | 0247080229 | REPUBLIC ENGINEERED PRODUCTS, INC | LORAIN |
| 16) | 258.2 | 0487010012 | PILKINGTON NORTH AMERICA INC | ROSSFORD |
| 17) | 254.7 | 0448020007 | BP PRODUCTS NORTH AMERICA INC | OREGON |
| 18) | 243.2 | 0247030013 | AVON LAKE POWER PLANT | AVON LAKE |
| 19) | 237.2 | 1318001613 | ISG CLEVELAND INC. | CLEVELAND |
| 20) | 232.0 | 0320010003 | JOHNS MANVILLE INTERNATIONAL INC. - DEFIANCE PLANT 2 | DEFIANCE |
| 21) | 227.7 | 0641050002 | CARDINAL POWER PLANT (CARDINAL OPERATING COMPANY) | BRILLIANT |
| 22) | 220.3 | 0362000079 | GRAYMONT DOLIME (OH), INC. | GENOA |
| 23) | 206.7 | 0448010246 | SUN COMPANY, INC. | OREGON |
| 24) | 206.1 | 0656000001 | ORMET PRIMARY ALUMINUM CORP. | HANNIBAL |
| 25) | 201.6 | 0627010056 | GAVIN POWER PLANT | CHESHIRE |
| 26) | 185.1 | 0320010005 | JOHNS MANVILLE INTERNATIONAL, INC. | DEFIANCE |
| 27) | 153.6 | 0320010004 | SHUT D - JOHNS MANVILLE INTERNATIONAL, INC. - PLANT 3 | DEFIANCE |
| 28) | 141.1 | 1413090154 | CINCINNATI GAS & ELECTRIC CO., WM. H. ZIMMER | MOSCOW |
| 29) | 133.4 | 0641160017 | W. H. SAMMIS PLANT | STRATTON |
| 30) | 128.8 | 0671010028 | CHILLICOTHE PAPER INC. | CHILLICOTHE |
| 31) | 126.6 | 0372000081 | CARMEUSE LIME INC MILLERSVILLE OPERATIONS | MILLERSVILLE |
| 32) | 110.4 | 0448000012 | JOHNS MANVILLE INTERNATIONAL, INC. / PLANT #01 - WTV1 | WATERVILLE |
| 33) | 109.5 | 1576000613 | THE TIMKEN COMPANY - STEEL PLANTS | CANTON |
| 34) | 102.2 | 0285020059 | MORTON SALT DIVISION OF MORTON INTERNATIONAL, INC. | RITTMAN |
| 35) | 99.4 | 1576050614 | THE TIMKEN COMPANY - BEARING PLANTS | CANTON |
| 36) | 92.1 | 1652050040 | OWENS CORNING, MEDINA PLANT | MEDINA |
| 37) | 89.7 | 0278000199 | GENERAL MOTORS LORDSTOWN COMPLEX - LORDSTOWN EAST PLANT | WARREN |
| 38) | 86.2 | 0381000011 | BUNGE NORTH AMERICA | DELPHOS |
| 39) | 85.4 | 0302020015 | INNOVENE USA LLC | LIMA |
| 40) | 84.2 | 0326000073 | NORTH STAR BHP STEEL L. L. C. | DELTA |
| 41) | 80.6 | 0204010003 | ELKEM METALS COMPANY | ASHTABULA |
| 42) | 78.0 | 0125100987 | GRIFFIN WHEEL CO. - COLUMBUS PLANT | GROVEPORT |
| 43) | 75.3 | 0285020076 | CARAUSTAR INDUSTRIES, INC. | RITTMAN |
| 44) | 71.1 | 0660010007 | OWENS BROCKWAY GLASS CONTAINERS - PLANT #12 | ZANESVILLE |
| 45) | 68.2 | 0448000013 | JOHNS MANVILLE - WATERVILLE 07 | WATERVILLE |
| 46) | 67.4 | 0374000022 | CHURCH & DWIGHT CO. | OLD FORT |
| 47) | 61.3 | 0363000002 | LAFARGE/SYSTECH ENVIRONMENTAL CORP. | PAULDING |
| 48) | 59.7 | 0684010011 | KRATON POLYMERS U.S. LLC | BELPRE |
| 49) | 57.6 | 0857780013 | DP&L, O.H. HUTCHINGS GENERATING STATION | MIAMISBURG |
| 50) | 57.2 | 0616010001 | STONE CONTAINER CORP.- COSHOCTON | COSHOCTON |
| 51) | 56.7 | 0243160009 | CLEVELAND ELECTRIC ILLUMINATING CO., EASTLAKE PLANT | EASTLAKE |
| 52) | 56.5 | 1576050694 | REPUBLIC ENGINEERED PRODUCTS, INC. | CANTON |
| 53) | 56.0 | 0322020200 | HANSON AGGREGATES MIDWEST WAGNER QUARRY | SANDUSKY |
| 54) | 54.9 | 0637010000 | GE LOGAN LIGHTING PLANT | LOGAN |
| 55) | 53.0 | 0448020006 | TOLEDO EDISON CO., BAY SHORE PLANT | OREGON |
| 56) | 51.8 | 0285010001 | THE QUALITY CASTINGS COMPANY | ORRVILLE |
| 57) | 51.5 | 0701000060 | DP&L, KILLEN GENERATING STATION | MANCHESTER |
| 58) | 46.6 | 0278000648 | ISG WARREN INC. | CLEVELAND |
| 59) | 46.3 | 0247040014 | ELYRIA FOUNDRY | ELYRIA |
| 60) | 45.8 | 0335010105 | CAMPBELL SOUP COMPANY | NAPOLEON |
| 61) | 44.3 | 0250110625 | V & M STAR | YOUNGSTOWN |
| 62) | 42.4 | 0660010101 | BURNHAM FOUNDRY | ZANESVILLE |
| 63) | 42.0 | 0857041124 | CARGILL, INC. - DAYTON | DAYTON |
| 64) | 40.9 | 1318000246 | CLEVELAND THERMAL LLC | CLEVELAND |
| 65) | 40.1 | 0773010001 | OSCO INDUSTRIES - PORTSMOUTH DIVISION | PORTSMOUTH |
| 66) | 39.6 | 1431150801 | FORMICA CORPORATION - EVENDALE OPERATIONS | EVENDALE |
| 67) | 39.6 | 1409040212 | SMART PAPERS - HAMILTON MILL | HAMILTON |
| 68) | 39.5 | 0278060023 | NILES PLANT | NILES |
| 69) | 39.4 | 0666000000 | UNITED STATES ENRICHMENT CORPORATION | PIKETON |
| 70) | 39.1 | 0448010066 | LIBBEY GLASS INC. | TOLEDO |
| 71) | 38.7 | 1431070039 | NOVEON HILTON DAVIS INC. | CINCINNATI |
| 72) | 37.9 | 0616010006 | CLOW WATER SYSTEMS COMPANY | COSHOCTON (TUSCARAWAS TWP.) |
| 73) | 37.5 | 0317010115 | NATIONAL LIME & STONE COMPANY | BUCYRUS |
| 74) | 36.2 | 0388000043 | NATIONAL LIME AND STONE COMPANY - CAREY, OH LIME PLANT | CAREY |
| 75) | 34.0 | 1677010193 | GOODYEAR TIRE & RUBBER CO. | AKRON |