Analysis
NAICS 48621 is the 2022 NAICS industry for pipeline transportation of natural gas, part of 4862 (Pipeline Transportation of Natural Gas).
It has only one more detailed code, 486210, which covers exactly the same activities; the definition, index entries and statistics are on that page.
County Business Patterns counts 1,908 US establishments in this code in 2023, employing 24,190 people at an average annual payroll of $147,843 per employee (97th percentile of national industries). 42% of the establishments have fewer than five employees, which is close to the national mix.
Between 2018 and 2023 the number of establishments fell 3% and employment fell 8%. The 2018 count used NAICS 2017, so part of a large move can come from codes being redefined rather than from businesses opening or closing.
Official definition
See industry description for 486210.
Source: US Census Bureau, NAICS 2022 Manual.