Industrial Stormwater Permit Guide

Your link to federal and state compliance resources

SIC Codes Covered by the MultiSector General Permit Program

Every business facility in the following SIC Codes must either have a stormwater permit or file a "no exposure certification."

Sector A: Timber Products

2411Log Storage and Handling (Wet deck storage areas only authorized if no chemical additives are used in the spray water or applied to the logs).
2421General Sawmills and Planning Mills.
2426Hardwood Dimension and Flooring Mills.
2429Special Product Sawmills, Not Elsewhere Classified.
2431–2439 (except 2434)Millwork, Veneer, Plywood, and Structural Wood (see Sector W).
2448, 2449Wood Containers.
2451, 2452Wood Buildings and Mobile Homes.
2491Wood Preserving.
2493Reconstituted Wood Products.
2499Wood Products, Not Elsewhere Classified.

Sector B: Paper and Allied Products

2611Pulp Mills.
2621Paper Mills.
2631Paperboard Mills.
2652–2657Paperboard Containers and Boxes.
2671–2679Converted Paper and Paperboard Products, Except Containers and Boxes.

Sector C: Chemical and Allied Products

2812–2819Industrial Inorganic Chemicals.
2821–2824Plastics Materials and Synthetic Resins, Synthetic Rubber, Cellulosic and Other Manmade Fibers Except Glass.
2833–2836Medicinal chemicals and botanical products; pharmaceutical preparations; in vitro and in vivo diagnostic substances; biological products, except diagnostic substances.
2841–2844Soaps, Detergents, and Cleaning Preparations; Perfumes, Cosmetics, and Other Toilet Preparations.
2851Paints, Varnishes, Lacquers, Enamels, and Allied Products.
2861–2869Industrial Organic Chemicals.
2873–2879Agricultural Chemicals.
2873Facilities that Make Fertilizer Solely from Leather Scraps and Leather Dust.
2891–2899Miscellaneous Chemical Products.
3952 (limited to list)Inks and Paints, Including China Painting Enamels, India Ink, Drawing Ink, Platinum Paints for Burnt Wood or Leather Work, Paints for China Painting, Artist's Paints and Artist's Watercolors.

Sector D: Asphalt Paving and Roofing Materials and Lubricants

2951, 2952Asphalt Paving and Roofing Materials.
2992, 2999Miscellaneous Products of Petroleum and Coal.

Sector E: Glass Clay, Cement, Concrete, and Gypsum Products

3211Flat Glass.
3221, 3229Glass and Glassware, Pressed or Blown.
3231Glass Products Made of Purchased Glass.
3241Hydraulic Cement.
3251–3259Structural Clay Products.
3261–3269Pottery and Related Products.
3271–3275Concrete, Gypsum and Plaster Products.
3291–3299Abrasive, Asbestos, and Miscellaneous Nonmetallic Mineral Products.

Sector F: Primary Metals

3312–3317Steel Works, Blast Furnaces, and Rolling and Finishing Mills.
3321–3325Iron and Steel Foundries.
3331–3339Primary Smelting and Refining of Nonferrous Metals.
3341Secondary Smelting and Refining of Nonferrous Metals.
3351–3357Rolling, Drawing, and Extruding of Nonferrous Metals.
3363–3369Nonferrous Foundries (Castings).
3398, 3399Miscellaneous Primary Metal Products.

Sector G: Metal Mining (Ore Mining and Dressing)

1011Iron Ores.
1021Copper Ores.
1031Lead and Zinc Ores.
1041, 1044Gold and Silver Ores.
1061Ferroalloy Ores, Except Vanadium.
1081Metal Mining Services.
1094, 1099Miscellaneous Metal Ores.

Sector H: Coal Mines and Coal Mining Related Facilities

1221–1241Coal Mines and Coal Mining-Related Facilities.

Sector I: Oil and Gas Extraction and Refining

1311Crude Petroleum and Natural Gas.
1321Natural Gas Liquids.
1381–1389Oil and Gas Field Services.
2911Petroleum Refineries.

Sector J: Mineral Mining and Dressing

1411Dimension Stone.
1422–1429Crushed and Broken Stone, Including Rip Rap.
1442, 1446Sand and Gravel
1455, 1459Clay, Ceramic, and Refractory Materials.
1474–1479Chemical and Fertilizer Mineral Mining.
1481Nonmetallic Minerals Services, Except Fuels.
1499Miscellaneous Nonmetallic Minerals, Except Fuels.

Sector K: Hazardous Waste Treatment, Storage, or Disposal Facilities

HZHazardous Waste Treatment Storage or Disposal.

Sector L: Landfills and Land Application Sites

LFLandfills, Land Application Sites, and Open Dumps.

Sector M: Automobile Salvage Yards

5015Automobile Salvage Yards.

Sector N: Scrap Recycling Facilities

5093Scrap Recycling Facilities.

Sector O: Steam Electric Generating Facilities

SESteam Electric Generating Facilities.

Sector P: Land Transportation and Warehousing

4011, 4013Railroad Transportation.
4111–4173Local and Highway Passenger Transportation.
4212–4231Motor Freight Transportation and Warehousing.
4311United States Postal Service.
5171Petroleum Bulk Stations and Terminals.

Sector Q: Water Transportation

4412–4499Water Transportation.

Sector R: Ship and Boat Building or Repairing Yards

3731,3732Ship and Boat Building or Repairing Yards.

Sector S: Air Transportation

4512–4581Air Transportation Facilities.

Sector T: Treatment Works

TWTreatment Works.

Sector U: Food and Kindred Products

2011–2015Meat Products.
2021–2026Dairy Products.
2032Canned, Frozen and Preserved Fruits, Vegetables and Food Specialties.
2041–2048Grain Mill Products.
2051–2053Bakery Products.
2061–2068Sugar and Confectionery Products.
2074–2079Fats and Oils.
2091–2099Miscellaneous Food Preparations and Kindred Products.
2111–2141Tobacco Products.

Sector V: Textile Mills, Apparel, and Other Fabric Product Manufacturing, Leather and Leather Products

2211–2299Textile Mill Products.
2311–2399Apparel and Other Finished Products Made From Fabrics and Similar Materials.
3131–3199 (except 3111)Leather and Leather Products, except Leather Tanning and Finishing (see Sector Z).

Sector W: Furniture and Fixtures

2434Wood Kitchen Cabinets.
2511–2599Furniture and Fixtures.

Sector X: Printing and Publishing

2711–2796Printing, Publishing, and Allied Industries.

Sector Y: Rubber, Miscellaneous Plastic Products, and Miscellaneous Manufacturing Industries.

3011Tires and Inner Tubes.
3021Rubber and Plastics Footwear.
3052, 3053Gaskets, Packing, and Sealing Devices and Rubber and Plastics Hose and Belting.
3061, 3069Fabricated Rubber Products, Not Elsewhere Classified.
3081–3089Miscellaneous Plastics Products.
3931Musical Instruments.
3942–3949Dolls, Toys, Games and Sporting and Athletic Goods.
3951–3955 (except 3952 facilities as specified in Sector C)Pens, Pencils,and Other Artists' Materials.
3961, 3965Costume Jewelry, Costume Novelties, Buttons, and Miscellaneous Notions, Except Precious Metal.
3991–3999Miscellaneous Manufacturing Industries.
3411–3499Fabricated Metal Products, Except Machinery and Transportation Equipment.
3911–3915Jewelry, Silverware, and Plated Ware.

Sector AB: Transportation Equipment, Industrial or Commercial Machinery

3511–3599 (except 3571–3579)Industrial and Commercial Machinery (except Computer and Office Equipment) (see Sector AC).
3711–3799 (except 3731, 3732)Transportation Equipment (except Ship and Boat Building and Repairing) (see Sector R).

Sector AC: Electronic, Electrical, Photographic, and Optical Goods

3571–3579Computer and Office Equipment.
3612–3699Electronic, Electrical Equipment and Components, except Computer Equipment.
3812Measuring, Analyzing and Controlling Instrument; Photographic and Optical Goods.

Sector AD: Non-Classified Facilities

N/AOther stormwater discharges designated by the Director as needing a permit (see 40 CFR 122.26(g)(1)(I)) or any facility discharging stormwater associated with industrial activity not described by any of Sectors A–AC. Note: Facilities may not elect to be covered under Sector AD. Only the Director may assign a facility to Sector AD.

1 A complete list of SIC codes (and conversions from the newer North American Industry Classification System (NAICS)) can be obtained from the Internet at or in paper form from various locations in the document entitled ‘‘Handbook of Standard Industrial Classifications,'' Office of Management and Budget, 1987. Industrial activity codes are provided on the Multi-Sector General Permit Notice of Intent (NOI) application form (EPA Form Number 3510–6).