| Business | Phone |
| Envent Corp 2398 California Ave, Signal Hill 90755 | (562) 997-9465 |
| Environmental Treatment & Tech 1500 E 33rd St, Signal Hill 90755 | (562) 989-4042 |
| Heritage Environmental Svc 2440 Cerritos Ave, Signal Hill 90755 | (562) 595-0209 |
| M P Environmental Svc 2675 Temple Ave, Signal Hill 90755 | (562) 427-1374 |
| T & T Environmental 2501 Cherry Ave, Signal Hill 90755 | (562) 490-3593 |
| A One-Stop Environmental Co Signal Hill 90755 | (562) 426-2036 |
| Source Group 1962 Freeman Ave, Signal Hill 90755 | (562) 597-1055 |