- Electric services (63)
- Gas transmission and distribution (4)
- Natural gas distribution (5)
- Gas production and/or distribution (4)
- Electric and other services combined (9)
- Gas and other services combined (1)
- Water supply (15)
- Sewerage systems (3)
- Refuse systems (73)
- Sanitary services, nec (20)
- Steam and air-conditioning supply (4)
- Irrigation systems (8)
