Archived - Standard Industrial Classification - Establishments (SIC-E) 1980

H - Communication and Other Utility Industries

49 - Other Utility Industries

Establishments primarily engaged in the generation, transmission and distribution of electricity the distribution of natural gas through a system of mains the treatment and distribution of water and in operating a utility not elsewhere classified.

492 - Gas Distribution Systems Industry

4921 - Gas Distribution Systems Industry

Establishments primarily engaged in the distribution of natural gas or synthetic gas through a system of mains. Establishments primarily engaged in operating pipelines for transport of natural gas are included in 4611 - Natural Gas Pipeline Transport Industry.