49-- ELECTRIC, GAS, AND SANITARY SERVICES



491- ELECTRIC SERVICES

4911 Electric Services



492- GAS PRODUCTION AND DISTRIBUTION

4922 Natural Gas Transmission

4923 Natural Gas Transmission and Distribution

4924 Natural Gas Distribution

4925 Mixed, Manufactured, or Liquefied Petroleum Gas Production and/or



493- COMBINATION ELECTRIC AND GAS, AND OTHER UTILITY SERVICES

4931 Electric and Other Services Combined

4932 Gas and Other Services Combined

4939 Combination Utilities, Not Elsewhere Classified



494- WATER SUPPLY

4941 Water Supply



495- SANITARY SERVICES

4952 Sewerage Systems

4953 Refuse Systems

4959 Sanitary Services, Not Elsewhere Classified



496- STEAM AND AIR-CONDITIONING SUPPLY

4961 Steam and Air-Conditioning Supply



497- IRRIGATION SYSTEMS

4971 Irrigation Systems