Source Categories

Emissions 

(tons/yr) %

Cumulative 

%

Adhesives and Sealants 1.00E-03 0.00 0.00

Aerospace Industries 7.15E-01 0.22 0.22

Agricultural Chemicals and Pesticides 5.56E-01 0.17 0.38

Air and Gas Compressors 2.50E-01 0.08 0.46

Aluminum Extruded Products 3.89E-01 0.12 0.58

Aluminum Foundries (Castings) [1] 1.36E-01 0.04 0.62

Animal Cremation 1.18E-02 0.00 0.62

Asphalt Concrete Manufacturing 9.00E-03 0.00 0.62

Asphalt Roofing Manufacturing 8.00E-03 0.00 0.63

Automotive stampings 5.15E-01 0.16 0.78

Ball and Roller Bearings Manufacturing 4.19E-01 0.13 0.91

Blowers and Fans 1.50E-01 0.05 0.95

Boat Manufacturing 5.00E-03 0.00 0.96

Bolts, Nuts, Rivets and Washers Manufacturing 5.00E-03 0.00 0.96

Brooms and Brushes 2.50E-01 0.08 1.03

Carburetors, Pistons, Rings and Valves Manufacturing 2.50E-01 0.08 1.11

Cement, Hydraulic (not subject to Portland Cement MACT) 3.58E-01 0.11 1.22

Chemical Manufacturing: Chromium Compounds 9.79E+00 2.96 4.17

Chemical Preparations 2.10E+00 0.63 4.81

Chromic Acid Anodizing 3.37E+00 1.02 5.82

Clay Products Manufacturing 1.10E+00 0.33 6.16

Clay Refractories (not subject to Refractories Manufacturing 

MACT) 4.00E-03 0.00 6.16

Cold Finishing of Steel Shapes 5.37E-01 0.16 6.32

Commercial Physical Research 5.00E-03 0.00 6.32

Conveyors and Conveying Equipment Manufacturing 5.05E-01 0.15 6.47

Copper Rolling and Drawing 1.26E-01 0.04 6.51

Custom Compound Purchased Resins Manufacturing 3.69E+00 1.12 7.63

Cutlery 2.50E-01 0.08 7.70

Cyclic Crude and Intermediate Production [2] 3.70E-01 0.11 7.82

Decorative Chromium Electroplating 9.94E+00 3.00 10.82

Electric Lamps 2.50E-01 0.08 10.89

Electrical and electronic equipment: finishing operations [3] 5.24E+00 1.58 12.48

Electrical Industrial Apparatus, nec 2.50E-03 0.00 12.48

Electronic Components, nec 7.50E-03 0.00 12.48

Engineering, Laboratory, Scientific and Research 2.50E-03 0.00 12.48

Chromium Compounds

Page 1
Source Categories

Emissions 

(tons/yr) %

Cumulative 

%

Chromium Compounds

Fabricated Metal Products Manufacturing 1.25E-01 0.04 12.52

Fabricated Metal Products, nec 1.40E+00 0.42 12.94

Fabricated Pipe and Fittings 1.25E-01 0.04 12.98

Fabricated Plate Work (Boiler Shops) 1.18E+01 3.57 16.54

Fabricated Rubber Products, nec 5.00E-03 0.00 16.55

Fabricated Structural Metal Manufacturing 6.38E+00 1.93 18.47

Fabricated Structural Metal Products 2.35E-02 0.01 18.48

Farm Machinery and Equipment Manufacturing 1.02E+00 0.31 18.79

Ferroalloy Production [4] 2.60E+00 0.79 19.57

Fluid Power Cylinders and Activators 2.50E-03 0.00 19.57

Fluid Power Pumps and Motors 1.90E-02 0.01 19.58

Food Products Machinery 1.36E-01 0.04 19.62

Food Products Machinery Manufacturing 1.00E-02 0.00 19.62

Gaskets, Packing and Sealing Devices Manufacturing 3.50E-03 0.00 19.62

General Industrial Machinery Manufacturing 5.15E-01 0.16 19.78

Hand and Edge Tools Manufacturing 3.05E-01 0.09 19.87

Hard Chromium Electroplating 1.38E+02 41.67 61.54

Hardware Manufacturing 2.66E-01 0.08 61.62

Hazardous Waste Incineration [5] 1.85E+00 0.56 62.18

Heating Equipment, Except Electric 4.14E+00 1.25 63.43

Heavy Construction, Nec 1.25E-01 0.04 63.46

Human Cremation 4.58E-03 0.00 63.47

Hydrochloric Acid Production 8.91E-06 0.00 63.47

Industrial Boilers 1.64E+00 0.50 63.96

Industrial Furnaces and Ovens 1.63E-01 0.05 64.01

Industrial Inorganic Chemical Manufacturing 1.14E+01 3.45 67.46

Industrial Machinery, nec 3.85E-01 0.12 67.58

Industrial Manufacturing and Equipment: finishing operations 

[6] 4.84E+00 1.46 69.04

Industrial Organic Chemicals Manufacturing 1.30E-01 0.04 69.08

Inorganic Pigments Manufacturing 3.18E+00 0.96 70.04

Institutional/Commercial Heating 2.40E+00 0.72 70.76

Internal Combustion Engine Manufacturing 2.50E-03 0.00 70.77

Iron and Steel Forging 4.79E+00 1.45 72.21

Iron and Steel Foundries (not subject to Iron Foundries MACT) 2.50E-01 0.08 72.29

Iron Foundries 2.58E+00 0.78 73.07

Page 2
Source Categories

Emissions 

(tons/yr) %

Cumulative 

%

Chromium Compounds

Large Appliance (Surface Coating) 2.65E-01 0.08 73.15

Lead Acid Battery Manufacturing 5.00E-03 0.00 73.15

Lead Pencils, Art Goods Manufacturing 2.50E-01 0.08 73.22

Leather Tanning and Finishing Operations 1.16E-01 0.04 73.26

Lighting Equipment 5.00E-03 0.00 73.26

Machine Tool Accessories 2.50E-03 0.00 73.26

Machine tools, Metal Cutting Types 2.79E-01 0.08 73.35

Magnetic and Optical Recording Media Manufacturing 1.33E-01 0.04 73.39

Manifold Business Forms 1.25E-01 0.04 73.42

Manufacturing Industries, nec 3.25E-01 0.10 73.52

Meat Packing Plants 5.00E-03 0.00 73.52

Medical Waste Incinerators 4.15E-01 0.13 73.65

Metal Barrels, Drums, and Pails Manufacturing 2.50E-03 0.00 73.65

Metal coating and allied services 7.81E-01 0.24 73.88

Metal Coil (Surface Coating) 1.07E-01 0.03 73.92

Metal Doors, Sash, and Trim 2.50E-01 0.08 73.99

Metal Forgings and Stampings 1.25E-01 0.04 74.03

Metal Furniture (Surface Coating) 2.50E-03 0.00 74.03

Metal Heat Treating Manufacturing 1.30E-01 0.04 74.07

Metal Sanitary Ware Manufacturing 3.78E-01 0.11 74.18

Metal Services, nec 1.25E-01 0.04 74.22

Metal Stampings Manufacturing 6.29E-01 0.19 74.41

Metal Valves [7]

Metalworking Machinery 2.53E-01 0.08 74.49

Mining Machinery Manufacturing 5.03E-01 0.15 74.64

Miscellaneous Fabricated Metal Products 6.51E-01 0.20 74.84

Miscellaneous Fabricated Wire Products 6.54E-01 0.20 75.03

Miscellaneous Plastics Products 1.75E-02 0.01 75.04

Miscellaneous Organic Chemical Manufacturing (MON) 1.03E-01 0.03 75.07

Municipal Waste Combustors 1.70E-01 0.05 75.12

Nonclay Refractories (not subject to Refractories 

Manufacturing MACT) 7.85E-01 0.24 75.36

Noncurrent-Carrying Wiring Devices 2.50E-03 0.00 75.36

Nonferrous Die-castings, Except Aluminum 2.50E-01 0.08 75.44

Nonferrous Forgings 3.93E-01 0.12 75.55

Nonferrous Foundries, nec 8.58E-01 0.26 75.81

Page 3
Source Categories

Emissions 

(tons/yr) %

Cumulative 

%

Chromium Compounds

Nonferrous Rolling and Drawing 2.67E-01 0.08 75.89

Paints and Allied Products Manufacturing 6.73E+00 2.03 77.93

Paper and Other Webs (Surface Coating) 2.50E-01 0.08 78.00

Paper Industries Machinery 6.27E-01 0.19 78.19

Paperboard Mills 5.00E-03 0.00 78.19

Petroleum Refining (not subject to Petroleum Refining MACT) 1.67E-01 0.05 78.24

Photographic Equipment And Supplies 5.00E-03 0.00 78.24

Plastic materials and resins manufacturing [8] 1.30E-01 0.04 78.28

Plastic Parts and Products (Surface Coating) 6.99E+00 2.11 80.39

Plating And Polishing 1.15E+01 3.48 83.87

Plumbing And Heating, Except Electric 1.28E-01 0.04 83.91

Plumbing Fixture Fittings and Trim 3.35E-01 0.10 84.01

Plywood/Particle Board Manufacturing 1.75E-04 0.00 84.01

Polishes and Sanitation Goods Manufacturing 1.15E-02 0.00 84.02

Portland Cement Combined [9] 1.34E-01 0.04 84.06

Power Transmission Equipment 5.00E-04 0.00 84.06

Prepared Feeds Manufacturing 2.50E-01 0.08 84.13

Pressed and Blown Glass and Glassware Manufacturing [10] 1.27E+00 0.38 84.52

Primary Copper (not subject to Primary Copper Smelting 

MACT) 2.50E-01 0.08 84.59

Primary Copper Smelting [11]

Primary Metal Products Manufacturing 5.49E+00 1.66 86.25

Primary Nonferrous Metals Production 1.60E-01 0.05 86.30

Printing Ink 5.37E-01 0.16 86.46

Printing Trades Machinery Manufacturing 1.85E+00 0.56 87.02

Printing, Coating, and Dyeing of Fabrics 1.46E+00 0.44 87.46

Printing/Publishing (Surface Coating) 8.00E-02 0.02 87.49

Process Control Instruments 8.50E-03 0.00 87.49

Radio and Television Communications Equipment (3663) 5.00E-03 0.00 87.49

Railroad Equipment Manufacturing 2.50E-01 0.08 87.57

Refractories Manufacturing 6.48E-01 0.20 87.76

Reinforced Plastic Composites Production 1.46E-01 0.04 87.81

Rubber and Plastic Hose and Belting Manufacturing 1.25E-01 0.04 87.84

Saw Blades and Handsaws 3.50E-03 0.00 87.84

Screw Machine Products Manufacturing 2.55E-02 0.01 87.85

Secondary Lead Smelting 2.15E-03 0.00 87.85

Page 4
Source Categories

Emissions 

(tons/yr) %

Cumulative 

%

Chromium Compounds

Secondary Nonferrous Metals Production 1.14E+00 0.34 88.20

Sewage Sludge Incineration 3.00E+00 0.91 89.10

Sheet Metal Work 7.76E-01 0.23 89.34

Shipbuilding and Ship Repair (Surface Coating) 4.69E-03 0.00 89.34

Small Arms 1.28E-01 0.04 89.38

Soap and Other Detergents Manufacturing 2.55E-01 0.08 89.45

Space Research and Technology 1.28E-01 0.04 89.49

Special Dies, Tools, Jigs and Fixtures 5.00E-01 0.15 89.64

Special Industry Machinery, nec 6.25E-02 0.02 89.66

Speed Changers, Drives, and Gears 3.10E-02 0.01 89.67

Stainless and Non-stainless Steel Manufacture - EAF [11] 8.81E+00 2.66 92.33

Stationary Internal Combustion Engines 4.92E-02 0.01 92.35

Steel and Iron Reclamation- Auto Scrap Burning 5.00E-01 0.15 92.50

Steel Foundries 1.89E+01 5.71 98.21

Steel Pipe and Tubes Manufacturing 8.30E-01 0.25 98.46

Steel Springs, Except Wire 2.50E-03 0.00 98.46

Steel Wire and Related Products Manufacturing 5.08E-01 0.15 98.61

Surface Active Agents Manufacturing 2.50E-03 0.00 98.61

Surgical and Medical Instruments Manufacturing 1.25E-01 0.04 98.65

Switchgear and Switchboard Apparatus 1.25E-01 0.04 98.69

Tanks and Tank Components Manufacturing 2.50E-03 0.00 98.69

Textile Machinery 3.50E-03 0.00 98.69

Tire Production 1.21E-02 0.00 98.69

Transformers, Except Electronic 5.00E-03 0.00 98.69

Turbines and Turbine Generator Sets 3.77E-01 0.11 98.81

Unsupported Plastics Profile Shapes 3.78E-01 0.11 98.92

Valves and Pipe Fittings Manufacturing [7] 7.87E-01 0.24 99.16

Welding Apparatus 1.78E-01 0.05 99.21

Welding Apparatus, Electric 1.25E-01 0.04 99.25

Wire Springs 1.01E+00 0.30 99.56

Wood Preserving 1.47E+00 0.44 100.00

Wool Fiberglass Manufacturing 1.21E-03 0.00 100.00

Total Emissions 331.14 100.00

Page 5
Source Categories

Emissions 

(tons/yr) %

Cumulative 

%

Chromium Compounds

Foot Notes 

[1] Aluminum Foundries (casting) (Nov. 2002 Inventory) 

combines two May 1999 categories: Aluminum Foundries and 

Aluminum Foundries (casting)

[2] Cyclic Crude and Intermediate Production was titled Cyclic 

Crude and Intermediate Production (not subject to petroleum 

refining MACT) in the May 1999 Report

[3] Electrical and Electronic Equipment: Finishing Operations 

(Nov. 2002 Inventory) combines two May 1999 categories: 

Electronic Equipment and Supplies, nec and Motor and 

Generators Manufacturing

[4] Ferroalloy Production was named Electrometallurgical 

Production in the May 1999 Report

[5] Hazardous Waste Incinerators were only included in the 

May 1999 Report for dioxins/furans; additionally, those 

emissions were all attributed to major sources

[6] Industrial Machinery and Equipment: Finishing Operations 

(Nov. 2002 Inventory) combines three May 1999 categories: Oil 

and Gas Field Machinery Manufacturing, Pumps and Pumping 

Equipment Manufacturing, and Construction Machinery 

Manufacturing 

[7] Valves and Pipefittings (Nov. 2002 Inventory) combines two 

May 1999 categories for chromium, manganese, and nickel: 

the Metal Valves category and the Valves and Pipefittings 

Manufacture category 

[8] Plastics Materials and Resins Manufacturing (Nov. 2002 

Inventory) was titled Polymers and Resins (I,II,IV) in the May 

1999 Report

[9] Portland Cement was only included in the 1999 inventory for 

dioxins/furans

[10] Pressed and Blown Glass and Glassware Manufacturing 

(Nov. 2002 Inventory) combines two May 1999 categories: 

Pressed and Blown Glass and Glassware Manufacturing and 

Glass Containers

Page 6
Source Categories

Emissions 

(tons/yr) %

Cumulative 

%

Chromium Compounds

[11] Stainless and Nonstainless EAF (Nov. 2002 Inventory) 

combines two May 1999 categories: Stainless and 

Nonstainless EAF and Blast Furnaces and Steel Mills' area 

sources 

[12] Primary Copper Smelting was removed from the 2002 

Inventory

Page 7