| Business | Phone |
| American Water Svc 453 Boot Rd, Downingtown 19335 | (610) 873-5700 |
| Barnebey Sutcliffe Corp 1055 Boot Rd, Downingtown 19335 | (610) 873-3070 |
| Trillium Inc 23 Lafayette Cir, Downingtown 19335 | (610) 383-7233 |
| Cawley Environmental Svc Inc 284 Boot Rd, Downingtown 19335 | (610) 269-4496 |
| Rafferty & James 109 Wooded Acres Ln, Downingtown 19335 | (610) 873-0066 |
| Excalibur Group Llc 512 Dublin Dr, Downingtown 19335 | (610) 280-9997 |
| On-Site Environmental Inc 807 Ravine Rd, Downingtown 19335 | (610) 269-8318 |
| Herpetological Associates Inc 110 Brandywine Ave, Downingtown 19335 | (610) 518-7690 |