- Electric services (693)
- Natural gas transmission (57)
- Gas transmission and distribution (40)
- Natural gas distribution (70)
- Gas production and/or distribution (45)
- Electric and other services combined (48)
- Gas and other services combined (23)
- Combination utilities, nec (97)
- Water supply (514)
- Sewerage systems (152)
- Refuse systems (2025)
- Sanitary services, nec (405)
- Steam and air-conditioning supply (56)
- Irrigation systems (889)