| Business | Phone |
| Sewerage Treatment Plant 327 Passaic Ave, West Caldwell 7006 | (973) 575-0225 |
| West Caldwell Construction Co 30 Clinton Rd, West Caldwell 7006 | (973) 226-2302 |
| West Caldwell Engineering 30 Clinton Rd, West Caldwell 7006 | (973) 226-2301 |
| West Caldwell Finance Director 30 Clinton Rd, West Caldwell 7006 | (973) 226-2300 |
| West Caldwell Health Officer 30 Clinton Rd, West Caldwell 7006 | (973) 226-2303 |
| West Caldwell Pumping Station 35 Stonybrook Rd, West Caldwell 7006 | (973) 226-1340 |